Hi everybody, I have just finished this low cost version of APM2.5 because it's difficult to buy a original board in my country, so I decided to build my own hardware with two layers PCB :)
I have solved some bugs in hw such as:
I also added a filter for AVCC for better adc result:
Modified PPM Encoder which is more simple in connection than original:
with one 3.3V SPI extension to connect with other 3.3V SPI device
The hardware worked well. data from sensor:
Next test, set up it to frame with full supports for a quadcopter and...fly
This version costs about $53, nice price, hah ^^
Some pictures (Dimension: 56mm x 56mm)
Bottom, I'd like to change original name for my new board? Is it OK?
I'm considering to open this hardware after I finished all test for this board. Someone can tell me any legacy problem when I share my Altium design to open source community?
Note: xtPilot is a modified hardware based on the APM2.5 open-hardware project.
Comments
did you use a reflow for the surface mount elements?
impressive indeed, could you show some of the process and equipment used?
You soldered that by hand? Respect.
You could definitely shrink it down more by getting rid of some of the commonly unused bits.
It's a work of art, Xuan! Nice to see a constructive derivative of APM.
@Graham: I did it just for hobbby :3 no plan yet!
impressive! how was it built ? looks like it was mass produced and not hand made.
@Luis: $53 for all. Yep, I solder all components by hand @@
@Hein: I'm sorry, I forgot to check with kk2 :D
@Thomas: I've recalculated, It just costs me $47.731, but AIO doesn't have enough feature like apm2.5, Sir. If I choose another components to replace the original components and reduce some of them but still keep the hardware works well, cost can be reduced to approx. 45$ @@ lol..
anyway you could miniaturize this by completely removing PWM RC input leaving only ppm with all surface mount mini connectors (HKmini like)? and making connectors+LEDs and baro on opposite board faces, so the board can be mounted with the baro facing down and connectors/LEDs up like on a pixhawk?
otherwise an interesting form factor (with room for improvement)!
is 53 all or just the PCB?
did you do all the soldering by hand? thats quite the skill the photos look pretty good.
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