.:madworm:.'s photos with the keyword: TSOP38238

After replacing the 12V victim with another ATtiny85 and switching the IR sensor to the TSOP38238 (cheaper, better range and less directional), my kitchen lights are now under remote control. It only looks ugly from below. While doing things one does in a kitchen you hardly notice any of that.

Completed the first board of the 2nd revision. The 3rd revision has some minor changes, more suitable footprints and better locations for parts. This one works nicely too. Total power consumption is about 6mA - with the LED on (powered by the pull-up). So far the only power-relevant code shuts off the analog comparator. Maybe the ADC should go to sleep as well.

It works reasonably well, although in real-world applications the IR sensor would probably have to be placed elsewhere (i.e. add wires).

If there should be a reincarnation of this board at some point, it would probably have dedicated PWM drivers. To allow for further shrinkage, I will have to use a tinier AVR package and probably get a hot-air thingy.

This thing will receive almost any 38kHz IR signal, the TSOP38238 demodulates it, the ATtiny85 measures the raw pulse-lengths and compares them against reference data. It does not do any decoding. It could, but that would make it less universal. And of course that can be changed in software. I made this to add IR control to existing projects without putting the burden of identifying the IR data ... onto the tiny shoulders of the first micro. This one will do the heavy lifting and sends simple byte-sized codes using a bit-banged software uart. The I²C lines are available as well, but I don't want to mess with the USI stuff again.