"I'm quite convinced that ESCs should be in the prop wash, so I don't think physically embedding them into the centre of a quad is a good idea.
Primarily because it's the best way to keep them cool - no point in adding fans when there are already…"
"@John - there are some much smaller logic-level N-Channel MOSFETs with much higher current capacities.
Look at some of the SMT packages - TO-252, D-PAK and I-PAK are just as easy to solder as TO-220.They are probably cheaper as well - similar (or…"
"Silly, it's no more spoof-proof than any other military-grade GPS device that has the encryption keys.- It might be smaller than existing encrypted units though, which would be interesting to the USA military but not for anybody else.
The way to be…"
"@Carl - the Martian atmosphere is pretty much pure CO2, with a bit of Nitrogen and Argon.
(Traces of other things)
We're not going there anytime soon, need to be confident that the astronauts would (a) survive the trip there, (b) have enough…"
"The airbag decision was down to weight - Curiosity weighs a lot.
They reckoned that airbags big enough to land it would be too big, too heavy and probably burst on impact anyway - drop a man on an exercise ball and it's a cushion, drop a car on…"
"Either coincidental bad luck or a wire got moved by accident during the installation and shorted out.
It is practically impossible for interference on the ESC signal wire to damage any well-designed ESC, invalid input should be ignored and…"
"These brushless motors are essentially 3-phase motors, the ESC pulses the three wires in sequential order.
The direction they spin is down to the order of the wires.
So connect the three wires however you want, and if it spins the wrong way swap any…"
"You've got a completely dry joint on the 328P debug/programming port.
Top-left of the photo, top left pin (VCC). It doesn't make contact with the PCB at all.
That might be why you can't connect to the 328P.
Looking at the rest of the pin headers in…"
"I'm with bGatti here, LDOs are simply the wrong way to get significant amounts of voltage regulated power.- LDOs in parallel basically doesn't work, they'll fight each other. That's probably what killed yours.
Single-chip monolithic buck DC-DC…"
"Or rather they had some fun throwing together a load of stock geometry without needing to worry much about whether it'd make sense, be possible to build or actually fly.
(I see a Predator drone chassis and a lot of other bits of stock geometry)"
"It's always best to start by checking that the kit actually works in the first place.
Step one:Check your ESCs and motors with a normal radio Rx.
- You will also need to read the manual for your ESCs as to how to arm them. Most ESCs need some kind…"
"It seems to have been buried in the thread, but somebody needs to check this:
Dave said that he has seen the APM appear to treat "No PPM input signal" as normal operation, holding the last good values from the Rx internally.- I don't know whether…"
"I2C is seriously fragile in the first place, it's got no inherent protection against EMI.
One thing that might help is to twist SDA and SCL with 0V, but probably not enough for that kind of length.- Twisting SDA and SCL together does nothing at all…"
I think that is the same size as the monochrome OLED used on a product at work, so take a look around those.
I'll try to remember to take a look at the markings on ours when I'm back in the office.
OLEDs is better anyway as the contrast is so…"
"Clearly the necessary thing to do is to get the rangers' actions mentioned on television.
"Park Rangers steal tourist's videos of Grand Canyon!" (and other such juicy headlines).
You really should go ahead and crucify them. That ranger is saying…"