Search results for: fuel

Battery Fuel Gauge with Zero Parts and Zero Pins on AVR

Blink LED Cropped

It can be nice to know how much battery power you have. It becomes critically important with LiPo batteries since you can permanently damage them by running the voltage down too low. Typically battery voltage detection requires adding a circuit with extra parts and their associated power requirements. Wouldn’t it be great to be able to do this using nothing but software? Read on for a no parts, no pins, no power solution…

Continue reading

Marketizing Zipcar

There are normally lots of Zipcars near me, but looking at Thanksgiving day things look pretty bleak…

SNAG-0001.png

If I want a Zipcar on Thanksgiving, my only option is to wait and hope someone cancels their existing reservation (which for other reasons will all likely happen 3 hours and 1 minute before the reservation start times).

Maybe a little marketization could fix this problem and make everyone better off….

Continue reading

Blinking Blue- Powering a 3.7 volt LED from a 2.4 volt coin cell with a $0.02 charge pump

www.GIFCreator.me_D8DxdM

Everyone loves blue LEDs and everyone loves coin cell batteries, but if you want to power a blue LED from a coin cell you will need some help. Here is a super-cheap and easy way add a to boost your LED voltage with only an additional capacitor & diode, and a little software.

Continue reading