All Posts (14048)

Sort by

UAV fiction

3689442738?profile=original

I have been working through the idea that in the future the functional equivalent of military UAV surveillance systems will be implemented by government agencies for domestic policing. I am interested in the software systems associated with networked surveillance platforms.The following is some fiction that I wrote to help me visualize the processes associated with such systems, I thought readers of this site might be interested.

Domestic Vultures

robbery assault Cnr. of Preston and Reynard 11.15am

"I'll take these love", I said pushing the fat plastic Coke, a super sized Mars and cellophane of salt & vinegar chips toward the cash register. Finding opportunity was getting easier. With gf waiting in the Toyota around the corner, I was about to make the first score of the day and I think the Asian girl calculating in front of me could feel it, "$5.50 please" she said nervously.

I think somehow people can sense me, instinctively know my intent. I guess I must be unconsciously broadcasting a malevolence or it could just be the open sores, odour of burnt plastic and disheveled appearance. I don't like to be rushed, while she waited for the money, I peered over her shoulder through the door behind, seeing the flash of a television, maybe hubby was back there, better make this a quiet one.

I reached behind and pulled out my heart starter; "can I get a plastic bag with that, and while your at it, give me all the notes in the register". I watched in fascination as she crumbled before me, smiling, my dominant to her subservient was complete. I lent over the counter, getting a little closer, her eyes expanding while flicking between trusty Starter and my grin, no doubt her thoughts falling toward more intimate deeds. Reveling in the moment, I considered escalating things, but back to matters at hand. "Now that's a good girl, put that (the cash) in first, the tasty’s on top".

The electronic chime sequence triggered by opening the door provided a lovely counterpoint to her whimpers as I exited. The smell of gasoline and gf's deodorant greeted me as I climbed into the Toyota, a quick twist and mouthful of sweet acid, i'm away clean. As gf rattles on, I count the money.

1000 meters altitude 3km away at 11.30am

Vulture 3 (as christened by the implementation team) was running station keeping program alpha, hooking a sharp-edged positive thermal and riding it upward when the UMTS 850MHz 3G modem went out of standby. Handshake complete, a 1.8 Mbps connection was made over HSDPA and IP packets streamed into the autopilot control board. The ultra low power processor chomped on these, all the while intermittently polling the GPS receiver, air pressure and IR attitude sensors.

A computed flight path now in memory, signals were sent to wake up servos throughout the small aircraft. Doors on the back of the fuselage opened and a retractable two bladed propeller arm rotated up to vertical, the spinner biting into the air as the brush-less electronic motor sparked into life, the ailerons, elevators and rudder fluttering in combination to maneuver the aircraft to a steep dive heading it toward GPS coordinates 3km away, ETA three minutes.

address censored, surveillance subcontractor’s office 6pm

"yo team, whatup?" Jonathon submitted to the chat-room. Leaning back on his ergo chair taking a long slurp of his DK coffee, he watched the content frame scroll with updates from the morning shift. Apart from some minor traffic (major boring stuff) and the regular stakeout missions, it had been a pretty quiet day.

The only item of interest on his patch was a robbery assault. A Vulture had arrived post event, but got a number plate leaving the scene. The operator had polled the networks for activated location services with the same position vector as the plate (in the hope of inserting a bug) without success. It seemed this bad guy either was across RX24 proticols or so low tech he didn't have a mobile phone with integrated GPS chip.

Wireless headset on and the appropriate alarms set, he went for a quick pee before things started to get busy. The start of the shift tended to be slow but as the evening matured mission requests normally started to pile up.

"Another day another dollar"Jonathon said to the fellow next to him in front of the urinal. The fellow, a IT tech supporting his team looked across, "tell me about it, I'm off to Bali this weekend. So how are those cam streams now? Did you notice any difference with the change of network provider?"

14 Lacelle 6.15pm

“Don’t forget what I said about the smoke”, Gerry said as he watched the two skinny kids get into the beat-up Toyota. He closed both doors locking them securely.
This was the second time this week he had seen Eddie, a regular customer now. In Gerry’s estimate Eddie was coming to the tail end of the standard user lifecycle for rock stars. Usage starting spiral with requests for credit as per usual. At least in this case he had paid everything owed with enough left over to buy a little motivation.

It was routine for Gerry to make requests for any smoke as customers left. “If you come across any green, you be sure to bring it to me (big smile). You know I do like a bit of a smoke and will trade motivation for it all.”

200 George 9.35pm

“Don’t do anything I wouldn’t do”, gf told him as she got out. “Yeah, same to you.” I replied. I could see from the way she didn’t meet my eyes that something was up tonight, but quite honestly I didn’t really care. She turned walked the few steps to the black street door of the karaoke club and buzzed, the door opened and she sprang up the steps without a look back.

I guess I didn’t mind the thought of those Asian businessmen pawing her each night. They certainly paid well for the privildge. Anyhow, I felt responsible for her popularity, since we had been seeing each other she had gone from a chubby teenager to a thin but still busty girl, her natural blond hair and ofcourse chest, a big hit with the Japanese expats.

The rocks we did together straight after seeing Gerry were almost out of my system, I went back to the flat, it was time to stoke up before the main event of the evening. I called a couple of mates, we got high, shooting the crap, eating pizza in front of the tube.

address censored, surveillance subcontractor’s office 12.30am

A package appeared in Jonathon’s mission request list. Linking on the ID he made it active, with a bit of luck, this time the Vulture would be there in time to acquire a target.

Jonathon was proud of the work he did. He was employed as part of a federal government initiative. The surveillance system, of which he was a part, was a recent add-on to local law enforcement. An increasing focus on security outcomes politically, meant that blanket surveillance was now acceptable if it met budgetary considerations. While still undergoing evaluation the RX24 platform, was promised to run at a sub $100 per flight hour cost basis.

RX24 was one of a new breed of non-military surveillance systems designed to leverage friendly environment infrastructure. At its core, the RX24 system utilized a 3G cellular phone network to control a constellation of unmanned aircraft (UAVs). The UAVs, nick named Vultures, were in a 2 meter wing span ultra lightweight powered glider format, able to provide persistent stare for 6 to 12 hours (depending on usage conditions). Each Vulture was fitted with a 2kg day or night vision payload which when a data connection was opened could stream near real time surveillance images over the internet.

20 meter altitude 34 Frank 12.35am

Vulture 5’s thermal imaging payload was in automatic target acquisition mode. The autopilot board guided the aircraft in a tight figure eights above the mission address when a human sized hotspot was spat out by the pixel filter subroutine. The recognition event resulted in the autopilot processor adding a new comment in the mission chat room, “single suspect acquired 34 Frank, 12.35.22 am, actively tracking”. A white recital now appeared around the white glow of the suspect in the night vision video stream with acquire time updated every second.

A return packet stream from networkwas diverted to the DSP and the Vulture’s integrated PA started up. “This is the police, you are currently under surveillance, you are required by law to stay where you are and wait for police officers who are on route to your current location. Any attempt to evade questioning will recorded and used against you in a court of law.”
Read more…
Moderator

Sebastian Thrun, most well know for the Google Car and his recent online AI class at Stanford, is branching out with a new startup focussing on online education.

He will be teaching a free 7-week class "Programming a Robotic Car" starting on February 20.

3689442802?profile=original

There's no direct link to the class, but http://www.udacity.com has a click-through at the top of the page.  The other class currently on the site is "Building a Search Engine".

The Syllabus:

Description: This class, taught by one of the foremost experts in AI, will teach you basic methods in Artificial Intelligence, including: probabilistic inference, computer vision, machine learning, and planning, all with a focus on robotics. Extensive programming examples and assignments will apply these methods in the context of building self-driving cars. You will get a chance to visit, via video, the leading research labs in the field, and meet the scientists and engineers who are building self-driving cars at Stanford and Google.

Prerequisites: The instructor will assume solid knowledge of programming, all programming will be in Python. Knowledge of probability and linear algebra will be helpful.

Week 1: Basics of probability
Car localization with particle filters
Week 2: Gaussians and continuous probability
Tracking other cars with Kalman filters
Week 3: Image Processing and Machine Learning
Finding objects in sensor data
Week 4: Planning and search
Determining where to drive with A* search 
Finding optimal routes with dynamic programming
Week 5: Controls
Controlling steering and speeds with PID
Week 6: Putting it all together
Programming a self-driving car
Week 7: Final Exam
Exam testing your knowledge

Background:

Professor Departs Stanford U., Hoping to Teach 500,000 Students at Online Start-Up

Read more…
Developer

Here a video of a long duration LOITER (GPS position Hold) with my QRO quadcopter piloted by the ArduMega v2 board and the firmware ArduCopter v2.2 B4xp1 (with JLN mod). The flight is very stable and secure.

3689442771?profile=original

3689442587?profile=original

Avionic setup: ArduPilot Mega v2,  firmware Arducopter V2.2 B4xp1

Receiver: Turnigy 9X8C v2, Transmitter: Turnigy 9x, c 5V @ 5A Turnigy

Quacopter frame: DJI Flame Wheel F450

Hardware Setup: 4 brushless motors RC Timer BC-2836/11 (750 KV), 2 CW propellers  12 x 4.5, 2 CCW propellers 12 x 4.5, 4 ESC 40A RC Timer speed controllers, one Lipo battery 3S Turnigy Nano-Tech 2200 mAh

Take Off Weight (TOW): 1088 g without payload, Flight time: about 10 min

3689442712?profile=original

More infos at:http://diydrones.com/profile/JeanLouisNaudin

Regards,
Jean-Louis

Read more…

Futaba T14 Mz Mode configuration for all 6 modes

3689442490?profile=original

Here a quick guide how to set up your Futaba T14
 
I use 2 switches
  1st switch “SE” – 2 position switch
  2nd  switch “SB” 3 position switch
 
 

Switch “SE” – Master    Switch “SB” -  Slave

How it works:

 Switch “SE”    “UP”   position   switch “SB”  select modes 1,3,5

 Switch “SE”    “Down”   position   switch “SB” select modes 2,4,6

 Step 1 .To get the right min/max PWM output we first need to set the Endpoint of channel 5, in my case name of channel 5 is “ Aux 1”

Linkage menu > EndPoint (ATV) > ch5   Aux 1  Travel value 65% and 72% as showed photo
 
 
3689442657?profile=original
 
Step 2. Model menu >Prog. Mixes > select 1st mixing
Set Master “SW-E”  and Slave Aux 1  , Value “Offset by X and Y  +25%
 
3689442613?profile=original
3689442678?profile=original
 
To get "Logic " window:
Click second "On"  ( after green "on" )
 
 
3689442631?profile=original
v3689442695?profile=original
What's all, enjoy.. 
 
 
 
 
Read more…

An update on my project (please see my previous two posts).

See https://www.youtube.com/watch?v=lhdR2Iesfuw

This is a screencast of APM2 running in HIL mode with the X-plane RC plane in an 8kt wind over a simple course, takeoff, circuit including loiter, land, fully auto (radio not touched). In JSBSim/SITL results are actually better than X-plane HIL which has poor resolution and slow sensor update.

 

If anyone wants to try this firmware, in X-plane or in HIL or SITL *please* let me know. I would like testers.

I can build it for APM1, ardupilot-mega and APM2 boards or of course there is the desktop version for SITL

I'll upload the source to a git clone soon as well.

 

My plan is to fly a skyfun and/or skywalker with it when the weather relents.

features so far:

Same base code as ArduPlane, but new navigation, stabilize and autopilot PDEs

FBW-A, B

STABILIZE

GUIDED

LOITER

RTL

WAYPOINTS and the normal mission planner stuff

geofence

mode switching

Auto-trim - boot with elevator stick at top of the range and plane will fly a short routine to self-tune as soon as you hit AUTO mode.

Presets - presets for several different kinds of UAVs

More free memory

Trig lookup tables to free up cpu

50hz navigation

GPS extrapolation

Read more…
3D Robotics

3689442345?profile=originalPlease see this warning from the Los Angeles Police Department, sent to the California Association of Realtors. Discussion on helifreak here.  More background and discussion here. I'll be talking to the NYT about this tomorrow. 

Short form: Amateur UAV use within the usual FAA guidelines (under 400ft, within visual line-of-sight, away from built-up-areas) is allowed, as always. But commercial use requires a COA, which you're not going to get. So there's nothing new here, but it's a reminder that the guidelines will be enforced.

LAPD Warning Against Hiring Unmanned Aircraft Operators for Aerial Photos

Los Angeles authorities have asked C.A.R. to communicate this warning to REALTORS® who hire unmanned aircraft operators to take aerial photographs for marketing high-end properties.  Using these devices (also known as drones) for flight in the air with no onboard pilot may violate, among other things, the Federal Aviation Administration's (FAA) policy on unmanned aircrafts, and Los Angeles's local ordinance requiring permits for filming commercial motion pictures and still photographs.

The Los Angeles Police Department's (LAPD) investigation has apparently revealed that aerial photos where unmanned aircraft were observed have appeared on certain real estate sales websites.  According to FilmL.A., the LAPD Air Division has issued this warning as it intends to prosecute violators in the near future.  FilmL.A. is a public benefit company created by the City and County of Los Angeles to manage film permit activity and related issues.

Under the Federal Aviation Administration (FAA)'s current policy, no one can operate an unmanned aircraft in the National Airspace System without specific authority.  Operators who wish to fly an unmanned aircraft for civil use must obtain an FAA experimental airworthiness certificate, which will not be issued to an unmanned aircraft used for compensation or hire. Although the FAA allows hobbyists to fly model airplanes for recreational purposes under specific guidelines, that authority does not extend to operators flying unmanned aircraft for business purposes. More information is available from the U.S. Department of Transportation’s Notice on Unmanned Aircraft Operations and the FAA's policy. 

Read more…
3D Robotics

3689442417?profile=original

Although both iOS and Android devices allow developers to get access to gyro/accel/mag data fusion output, it's not as low-level as developers of autopilots would like. Make Windows 8 will get closer.

From The Verge:

Microsoft's Windows 8 operating system will include improved sensor support, introducing new hardware sensors for the first time in some cases, and an easy way for developers to target and make use of the hardware with Metro Style applications. Microsoft is building in adaptive brightness, automatic screen rotation, and compass support based on a number of sensors: ambient light sensor, accelerometer, magnetometer, and gyroscope.

Similar sensor support can be found in Android and iOS operating systems, but Microsoft also revealed its own "sensor fusion" support for Windows 8 today, a way for developers to use the power of each sensor together to combat the various weaknesses in each individual implementation. The combination of multiple sensors can provide better data for application developers, and sensor fusion appears to be designed to aggregate this. That, too, isn't a new concept, but perhaps Microsoft will make combined sensor algorithms more exposed than in the mobile realm. It's not clear exactly how accessible it will be, but Microsoft hopes the simple API support for developers will allow them to build Metro Style and desktop applications that use a variety of sensors, and in turn better apps for end users.

Developers with access to the Samsung Windows 8 slate PC can access the sensor support immediately, and other developers can purchase a development board that attaches via USB to test out the sensor experience. Microsoft's first beta copy of Windows 8 will be made available in late February, and we're expecting to hear more from hardware vendors throughout the year as they plan to bring these sensors to life inside future Windows tablets and slates.

Read more…

Oppurtunity to have fun while you get PhD

The folks MAVlab team from the Delft University, faculty of aerospace engineering, have been actively involved in the paparazzi community. They have been part of the the paparazzi community since 2006 and have different MAV projects running in the lab. The subjects of thier projects have covered a very wide range: From swarming over autonomous spot landing, Hybrid uav`s (quads with wings), flapping wing (www.DelFly.nl), fixed wing, rotary wing, electronics (yapa, imu`s), control and filtering software, vision algorithms, indoor operation,..

To strengthen the knowledge/expertise in thier lab they are looking to good people to do join for phd on MAV`s. If someone is actively involved in MAV`s have a master degree in engineering, computer science, computer vision. Please contact them with your cv to microuav@gmail.com. Please do include information (pictures, youtube movies) on MAV related project`s.

Read more…
3D Robotics

Check out this open access robotics journal

3689442335?profile=original

It's free and open! Current issue has an interesting paper on sensorless control of DC motors with a Kalman filter. 

The journal covers:

"...international activities that relate to the design (mechanical, control architectures, actorics, sensorics...), experimental results and applications of:

  • Autonomous Robotic Vehicles (aerial, ground, underwater)
  • Wheeled Mobile Robots
  • Reconfigurable Robots
  • Micro Robots
  • Multi-Robot Systems
  • Swarm and Cooperative Robotics
  • Soccer Robotics
  • Navigation
  • Perception
  • Localization & Mapping
  • Path Planning
  • SLAM Algorithms
  • Robot Cognition, Adaptation and Learning
  • Evolutionary Robotics
  • GA and Neural Networks for Mobile Robots
  • Simulation and Visualization Tools for Mobile Robots"
Read more…
3D Robotics

3D-printed helicopter blades

A perfect combination of my twin passions, 3D printing and copters! From Hackaday:

If you’re like us, you’ve been infatuated with the small RC helicopter you picked up on Amazon up until the point where it careened off a wall and broke its blades. Now that you’re wondering about what to do with that small pile of plastic, metal, and electronics, why not print some helicopter blades on your 3D printer?

[Taylor] printed these blades on his Utilimaker, but we don’t see why they couldn’t be printed on a Makerbot or other RepRap. The first set of printed blades worked on the top rotor, but they were too heavy when all four blades were replace. The parts were edited in netfabb using a 0.08mm layer height and now they’re working perfectly. As far as free tools go, Slic3r is the new hotness for .STL to Gcode conversion and now that [Taylor] put the files up on Thingiverse, anyone can print a set of spare blades.

Read more…

Firefly Mark One Flies in TREX Configuration.  It's like a Space Odyssey!

As you can see above the 3D printed frame project has advanced one more step.  I have fitted the 3D printed hub with 4 cut down TREX 450 (12mm) tail booms.  It's being flow in Stability Mode.  Just a note on cutting the aluminium tail booms, the easiest way I found was using a plumbers copper pipe cutter.

PID Settings:

For those who are curious, I am flying Arducopter v2.22b4, the latest version served up by Mission Planner.  I dialed back the default P values for yaw, roll, pitch and throttle to 80%.  The default values are too aggressive for such a small frame.  I think I could dial it back even further to 75% or 70% still be responsive.  I initially used 50% of default, and it was stable, but response was to slow.

3689442180?profile=original

3689442292?profile=original

Frame with the APM mounted, and RC receiver tucked under.  Very compact.
3689442226?profile=original

All connected up with cool 3 bladed props 8x4",  Unfortunately on it's first lift off took a dump and lost one of the blades on a prop, and I had no spares.  Now I have to run with the 9" 2 blade props. ;-(

3689442305?profile=original

Next Step

The next step is to fly with the integrate micro 10g motors, using the integrated arms:

3689442241?profile=original

Unfortunately, I was testing one of the motors, while holding it in my hands and it slipped out, and ripped itself apart.  Lesson learned, "Don't underestimate the torque of these little 10g motors".  Now I have to wait for another round of HK delivery.  Anyone know how to rewind these little motors?

3689442320?profile=original

Recommended Parts List

4 x Common Trex 450 tail booms (12mm)   $4.95 for 5 booms on ebay
2 x Bags of M3x20mm hex bolts $1.99 each
1 x Bag of M3 nuts $1.76

Power Distribution Board
Although I build my power bus by soldering a bunch of wires together you can order one from DiYDrones for $8. Quad Power Distribution Board

Support for APM1, APM2, and KKMulticopter

The Firefly frame has a mounting plate that will fit APM1,APM2, and even KKmulticopter controller boards.  The KKmulticopter is a good controller for those on a budget for as low as $19 on ebay.

Fully Interchangeable and Replacable Parts

Check out my shop on Shapeways for Firefly frame parts, and look out for the fully integrated frame to be put on sale, as soon as I validate that it's a good flyer, which of course, I have no doubt.

Notice that the integrated arms will have interchangeable motor mounts to custom fit various motor mount sizes.

426350.v6.s14.convert.large.jpg



Firefly Mark One with TREX 405 Tail Boom(12 mm) Motor Mounts:
448302.v1.s14.convert.large.jpg
Read more…

I've been experimenting with using an Arduino-powered vision system to detect and locate point light sources in an environment. The hardware setup is an Arduino Duemilanove, a Centeye Stonyman image sensor chip, and a printed pinhole. The Arduino acquires a 16x16 window of pixels centered underneath the pinhole, which covers a good part of the hemisphere field of view in front of the sensor. (This setup is part of a new ArduEye system that will be released soon...)

The algorithm determines that a pixel is a point light source if the four following conditions are met: First, the pixel must be brighter than it's eight neighbors. Second, the pixel's intensity must be greater than an "intensity threshold". Third, the pixel must be brighter, by a "convexity threshold", than the average of it's upper and lower neighbors. Fourth, the pixel must similarly be brighter, by the same threshold, than the average of it's left and right neighbors. The algorithm detects up to ten points of light. The Arduino script then dumps the detected light locations to the Arduino serial monitor.

A 16x16 resolution may not seem like much when spread out over a wide field of view. So to boost accuracy we use a well-known "hyperacuity" technique to refine the pixel position estimate to a precision of about a tenth of a pixel. The picture below shows the technique: If a point of light exists at a pixel, the algorithm constructs a curve using that pixel's intensity and the left and right intensities, then interpolates using a second order Lagrange polynomial, and computes the maxima of that polynomial. This gives us "h", a subpixel refinement value that we then add to the pixel's whole-valued horizontal position. The algorithm then does something similar to refine the vertical position using the intensities above and below the pixel in question. (Those of you who have studied SIFT feature descriptors should recognize this technique.) The nice thing about this technique is that you can get the precision of a 140x140 image for "light tracking" without exceeding the Arduino's 2kB memory limit.

3689442260?profile=original

The algorithm takes about 30 milliseconds to acquire a 16x16 image and another 2 or 3 milliseconds to locate the lights.

The first video shows detection of a single point light source, both with and without hyperacuity position refinement. When I add a flashlight, a second point is detected. The second video shows detection of three lights (dining room pendant lamps) including when they are dimmed way down.

It would be interesting to hack such a sensor with a quadrotor or another robotic platform- Bright lights could serve as markers, or even targets, for navigation. Perhaps each quad rotor could have an LED attached to it, and then the quad rotors could be programmed to fly in formation or (if you are brave) pursue each other.

With additional programming, that sensor could also implement optical flow computations much like I had done in a previous post.

SOURCE CODE AND PCB FILES:

The main Arduino sketch file can be found here: LightTracker_v1.zip

You will still need library files to run it. I've put these, as well as support documentation and Eagle files for the PCBs, in the downloads section of a Google Code project file, located here: http://code.google.com/p/ardueye-rocket-libraries/downloads/list

Read more…
3D Robotics

Andrew Tridgell ("Tridge") is a well-known programmer in the open source world (Samba, etc) and one of the leaders of the APM dev team. His UAV team, CanberraUAV, will be competing in this year's Outback Challenge with an APM-powered Telemaster, and at the Australian Linux conference he gave a spectacular lecture about the team's strategy and the technological challenges in the competition. 

This is a must watch for anyone interested in more advanced UAV functions. Tridge and his team have added a Panda board to APM to do image processing. This is a great opportunity to watch a world-class technologist explain the strategy they're using to try to win this competition. 

Read more…

Our first flight ever

Hello! This is our first UAV video and some clips from our first flights. We never done anything like it and you will enoy the crashes :p Our prodject is to build a UAV with the beagleboard mini computer, wify, 3g, auto pilot. But for now we

will have to learn how to fly RC,

Pictures can be found on our facebook page, just like Information technology arts.

All feedback is welcome!

Read more…
Distributor

DJI Wookong Test In The Wind

 

 

 

 

We set out to see how well the DJI Wookong WK-M would hold up in the windy conditions today, the wind at ground level was gusting anywhere from 5 to 20 MPH, we had no way of knowing what the wind was doing at altitude but you can hear the copter fighting hard to hold position and see the way the copter pitch changes as it fights into the wind, this video is long due to the last flights being complete to the battery was spent! All the flights were done in the GPS Atti mode and apart from the odd adjustment in position all flights were hands off.....

Regards

Martin

www.buildyourowndrone.co.uk

Read more…
Moderator

3.3v Power Supply Options - What's recommended?

58tut-1.jpg?width=360

The items shown above are part of a 5.8GHz video transmitter (#5) setup offered by Range Video.  All items are sold as individual items and like a big dummy I forgot to get Santa Clause order their powersupply (#4) when she placed her order for the transmitter. 

So the luck of the Irish kicks in and Mr. Murphy ordered their last Filtered Linear Power Supply and there's no telling when they will be back in stock.  So I'm on the hunt for another suitable power supply that will output the required 3.3v to run the transmitter and camera.  I've poked around and found that a lot of the setups used by fellow DIYDrones members have built in voltage regulators and are just attached to a lipo (typically 7.2v).

I have a few other projects in mind beyond the video transmitter for my Raven so getting a good lead on a good ps would be very nice to have.

I did manage to find several power supplies that may work but I'd like to know what more experienced tinkerers think.

#1

Breadboard Power Supply 5V/3.3V by Sparkfun

00114-05_i_ma.jpg?width=250This one is intended to use a walwart in the recommended 7-9v range.  It outputs a selectable 5v or 3.3v but forgive the newb-ness, I'm not sure if I HAVE to use a walwart.  Wouldn't a 2 or 3 cell lipo do the DC trick just fine?

#2

DC-DC 12V to Dual output 5V / 3.3V LED Power module

100_3610_500x334.jpg?width=250This E-Bay special is pretty cheap and has free shipping.  It seems like it would do the job just fine and would not need to be converted to not being a plug in for a breadboard. But would a LED power module work for the above mentioned video transmitter?  Voltage is spot on to what I need but I'm unsure of the LED part of the description...  

#3 

Question_mark_alternate.svg?width=250

You tell Me...  If all these finds are junk and you use something else, please let me know.  Also if you have a design I could build that would work too.

 

Read more…