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yep, thats what I think, too... Aaaaand, yes, the original 12V version used a zener... This circuit is useless.. :(
Arduino Timer Interrupts
Thermometer That Pushes Arduino to Its Limits
Easy Croissants Recipe
Great job, thank you!"putting Arduino to sleep when there is nothing to do"How about this: https://github.com/brabl2/narcoleptic
This instructible is by far the most comprehensive piece of work I have ever read! AND it does not use this platform as a free advertising opportunity...
Arduino controlled light dimmer
How to unlock Digispark ATtiny85 and convert it to a Trinket
Turn An Old Cell Phone Into A Smartwatch
It is one of the best ideas on this site I have come across so far... I made it, but it does not seem to protect against anything. Charging current is not limited anywhere below 2A, and cell discharged below 2.6V. I salvaged from an old Samsung battery. I wonder what the circuit does, if not limiting charging current, and cutting off below a save voltage (2.75V lowest?)... Any idea?
Heatless (cold) Toner Transfer for PCB making
How to Protect any 18650 Cell
Convert $2 LED Lamp to $50 Smart Lamp
The Ultimate PVC Quadcopter
Transfer Photograph onto Wood
Remote Controlled Floor Lamp
3D Printing Class
Switchifi : Wifi Enabled Switch under $20
Color + Finishes
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