This is a small lighting controller circuit based around an AVR microcontroller. It supports two inputs and two outputs and configurable timing delays. The outputs use MOSFETs that should be good for up to 50VDC and 20A.
The board/ directory contains the Eagle files for the board and
firmware/ contains the source for the firmware. You'll need
avr-gcc et al. to build it. make load will attempt to program
the firmware using my setup (avrdude w/ buspirate on
/dev/cuaU1).
NB. the current version of the board has not been built and the old version that I did build had some problems that required a bit of rework. I beat the old version into working shape and that was good enough for my immediate needs.
Not included in the schematics are the front-panel controls: a power toggle, momentary switch, generic rotary encoder (w/ press switch) and 4x20 HD44870-style LCD. The switches and encoder need pull-ups and debouncing caps.
The firmware allows triggering from logical combinations of the inputs (e.g. "input 1 high and input 2 low"). Upon triggering it waits a configurable delay (from 1us to ~1ksec) and enables one or both outputs for a configurable duration. It also supports a strobe mode that goes from milli-hertz to close to 1MHz frequency and has adjustable duration and duty cycle.
The outputs are not isolated from each other, but they are isolated from the inputs and the main board. Likewise the inputs are isolated from the main board and the output but not from each other.
This was only my 2nd attempt at cutting a board, so it's probably terrible. You have been warned :)