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  • Hacking an Arduino ISP Shield for AtTiny45 / AtTiny85

    Nice mod -- I almost always use attiny85 or atmega328, so this mod was perfect; I followed @ArtificerMade's lead.Using solid core wire definitely helps make it easier. Take your time and you get get it nice and clean. @cyclicedundancy has a good idea. If you carry it a bit further, you could add multiple sets of headers (to go into the EVM shield) wired to the ZIF socket; for attiny2313, attiny84, etc so you could just position the daughter board in a few positions for your specific chip.

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  • Programmable Battery Protection [Open Source]

    @ac1ac: SMD's are not that hard -- google soldering drag method. these size components should be easy to do with hand soldering. For thru hole of similar design: https://oshpark.com/shared_projects/HMkBS9RI (I've built a number of these, but the BOM from the files are wrong)This SMD version is much nicer/compact in that it is slimmer and I think can slip into existing project boxes a little easier.Good job!----@jtechian: I agree, that high current needs thicker traces & a heat sink on the mosfet, but I think it wiser to just use it to drive a relay. I was going to order some boards off oshpark, but they complained about the gerbers, (oshpark lets you choose thicker weight traces.) I would modify the code the to use a watchdog timer to wake instead of disabling the watchdog, so ...see more »@ac1ac: SMD's are not that hard -- google soldering drag method. these size components should be easy to do with hand soldering. For thru hole of similar design: https://oshpark.com/shared_projects/HMkBS9RI (I've built a number of these, but the BOM from the files are wrong)This SMD version is much nicer/compact in that it is slimmer and I think can slip into existing project boxes a little easier.Good job!----@jtechian: I agree, that high current needs thicker traces & a heat sink on the mosfet, but I think it wiser to just use it to drive a relay. I was going to order some boards off oshpark, but they complained about the gerbers, (oshpark lets you choose thicker weight traces.) I would modify the code the to use a watchdog timer to wake instead of disabling the watchdog, so it spends most of it's time asleep and wakes up ever few seconds to do it's tests.

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  • Desulfator for 12V Car Batteries, in an Altoids Tin

    Could one add a simple low-voltage-disconnect (via mosfets or relays) between the desulphator and battery? So you could hook it up and walk away; and know when you returned, it would not have drained the battery completely... Say disconnect at 10.5v? Or would running thru a relay or mosfet negatively effect the pulse?

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