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PVC Hookup Wire Storage
Impossible Nail in Wooden Block
Great Instructable. You might want to complement the charger with a controlled discharge to check on the cells and add longevity. See for example my Instructable http://www.instructables.com/id/Li-Ion-Discharger
Hot glue faux cast iron weld beads
Coloring Epoxy With Laser Toner
Thank you. This was a really fun project to do. I (re)learned a ton on vector math and astronomy along the way.
Two axis star trackerView Instructable »
Great minimalistic project! Now (I am just teasing a bit) some deep sleep mode and this project can be "gardenized". I would expect, though not sure, that if it is possible, a thorough reconnect to the Wifi is probably needed.
You're welcome! I posted the project I mentioned. http://www.instructables.com/id/Star-Finder/
Li-Ion dischargerView Instructable »
Great instructable! I understand you use this to avoid under-voltage while flying. If you also want to watch your battery under a tiny load, you might want to put a lot of emphasis on extreme low power usage and avoid a separate power supply, so actually self-measuring Vcc. Here is an example. Mind you, same idea, but different application.http://www.instructables.com/id/Lithium-Cell-Protection-in-Arduino-Projects/
Lithium Cell protection in ...View Instructable »
Indeed! Thank you for your kind comment.
Exactly right. And that is also why I needed that blue switch."On", as in, capacitor to RST connected: use for sketch uploading to the ATtiny85."Off", use for uploading ISP or HV sketch to the Nano.
Star finderView Instructable »
I made this variant. The top side of the ZIF socket acts as a normal programmer, the bottom sie being this HV programmer. The only thing to o is to reprogram the Nano and off you go. The little switch is to enable the "do not reset" capacitor, needed for normal programming.
May I suggest a few additional power savers?- Consider using an arduino pro mini, as it doesn't have a usb-2-serial chip using power;- Remove all permanent-on LEDs;- Remove the power regulator from the UNO and use a LiPo 3.7 volt cell instead of 9 volts;- Use the LowPower.h library to send the processor in a deep sleep in the Loop() most of the time;- Power down the I2C interface while asleep (I will post a project that used this used shortly)Using all these techniques you can make this thing run for a year on one battery!
Simple and cheap Fuse Doctor for Attiny
Straightening wire and beyondView Instructable »
I am afraid this instructable is not antirely clear. You have to use the "Embed Video" tab it seems, then it works.Choose the +Add button, then select choose video, then paste the link.
Nix that please. A 7555 is using much less energy, but requires higher voltage. I recreated this project using a ATtiny85 that's 99.9% of the time in sleep mode and lasts 100 days on a single 3V CR2032 coin cell. 8 year old son of a friend of mine drove the teacher bonkers but kept his mouth shut!
SAE J1772 EV charger checkerView Instructable »
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