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I decided to update my 6-channel RC LED flasher. The original design has been working well but had only one flash pattern and only sampled the PPM at the end of each cycle making it appear slow to respond to control changes.

So after a day of programming I have the PPM and flash control fully interrupt based, modular and much more versatile. The PPM detection is as good as instant and the flash pattern is defined in a timing table defining each channel.

This means I can define various standard patterns and have them selected at power on with PPM settings, a bit like programming a ESC, and remembered until reprogrammed.

I’ve included code for a PPM output channel which I may configure to allow a servo to be used for bomb-drop, a camera trigger or whatever comes to mind.

The main functions are working and all I have to do now is tie a few bits together and it’s done.

Development – on the bench

More to come…