@androidarts@mastodon.gamedev.place
2026-03-20 21:00 UTC
Made little progress today. Found a plank. Make a bird house? It might need a fan. How to power it? Intermittently during sunlight to save power. I hook up a fan to a 548 driver transistor, calculate base R to 20K. Might get 3K hrs out of 3AA? 30x1 mins per summer day. I build an LDR thing for sunlight detection. Find an ATtiny13A for timing. Install the core. Read the datasheet's watchdog stuff. Upload is flaky but eventually works. Then the chip stops responding T_T Might be USBasp firmware.
Replies (2)
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@androidarts@mastodon.gamedev.place 2026-03-20 21:15
There are low power timer ICs but my 555s are not one of them, using several milliamps. An MCU can go much lower strangely. It just needs to wake up and poke the driver transistor. It's just a hundred bytes or so of code, out of a generous 1024 for the ATtiny13A. The LDR light sensor can be read by the MCU, or a temporarily powered comparator can be used, which is what I did, connecting the output to the transistor. But there might be a better cooling solution for bird houses. Reflective coat
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@jon_dog@mastodon.social 2026-03-21 02:48
@androidarts@mastodon.gamedev.place sometimes every project is this video https://www.youtube.com/watch?v=AbSehcT19u0