Greetings. Attached is very early, "proof of concept" alpha firmware to test tone output signalling for the Pixhawk LITE via the AUX pins (since this board does not have a Speaker/Buzzer OUT pin).

PLEASE NOTE THE FOLLOWING! (As the saying goes, not the usual yadda yadda!)

No warranties, expressed or implied. Install this firmware at your own risk! (It works fine for me, but that doesn't prove anything!)

This firmware is based on 3.4-dev. Whether or not you actually want to fly with it is up to you.

This firmware is currently hard-wired to output on AUX pin 1. If you have anything else on there, be sure to remove it. Later versions should allow you to choose any AUX pin.

This current firmware is designed for a PASSIVE piezo transducer. If you try use an ACTIVE piezo (the type that generates its own tone) you'll likely just get a continuous buzz. Later versions should be able to support active piezos at least for basic signalling purposes.

With a passive piezo, this firmware will play a short tune when the board starts up. Right now that's all it does as far as the piezo is concerned, and don't expect Mozart! More to come.

You can connect a passive piezo directly to AUX pin 1 between GND and SIGNAL, but (a) it will be very low volume, and (b) this can stress the output circuitry of the processor and board. I STRONGLY recommend attaching a passive piezo via a resistor and NPN transistor driver in a standard configuration. A voltage like +12v to the transistor should also provide significantly louder output from the piezo.

Please let me know if you have any questions. Have fun!

ArduCopter-v2-LW-alpha-10-1-15-A.px4

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Activity

DIY Robocars via Twitter
May 15
DIY Robocars via Twitter
May 14
DIY Robocars via Twitter
May 13
DIY Robocars via Twitter
RT @f1tenth: Say hi to our newest #F1TENTH creation for @ieee_ras_icra next week in Philly. It’s going to be huge! 😎 🔥 @AutowareFdn @PennEn…
May 13
DIY Robocars via Twitter
May 11
DIY Robocars via Twitter
May 8
DIY Robocars via Twitter
RT @SmallpixelCar: Noticed my car zigzagged in last run. It turned out to be the grass stuck in the wheel and made the odometry less accura…
May 8
DIY Robocars via Twitter
RT @SmallpixelCar: Test my car. RTK GPS worked great. Thanks @emlid for their support. https://t.co/EkQ6qmjmWR
May 8
DIY Drones via Twitter
RT @chr1sa: @kane That's @diydrones circa 2009. Still have a box of those Canon cameras that we used to strap into planes, just like this.…
May 3
DIY Robocars via Twitter
RT @chr1sa: Our next @diyrobocars race is going to be outside at a real RC racetrack in Fremont on May 28. Fully autonomous racing, head-to…
Apr 30
DIY Robocars via Twitter
RT @f1tenth: Our Spring 2022 F1TENTH course @PennEngineers is coming to an end with a head-to-head race as a big finale. So proud of our st…
Apr 26
DIY Robocars via Twitter
RT @DanielChiaJH: I wrote a thing! Throughout the development of my @diyrobocars car I've been using @foxglovedev Studio to visualize and d…
Apr 23
DIY Robocars via Twitter
RT @SmallpixelCar: My new car for high speed. Low body, everything ( @NVIDIAEmbedded Jetson Xavier NX, @emlid RTK GPS, IMC) under the deck…
Apr 23
DIY Robocars via Twitter
Apr 21
DIY Robocars via Twitter
RT @f1tenth: F1TENTH Race training setup @PennEngineers for our upcoming ICRA2022 @ieee_ras_icra competition. @OpenRoboticsOrg @IndyAChalle…
Apr 21
DIY Robocars via Twitter
RT @fatcatFABLAB: Proud to be hosting a restarted DIY Robocars NYC Meetup April 26. Come by if you want to talk about and race self-driving…
Apr 17
More…