3 ms·
Folks interested in this, might be interested in the already available Tritium Batteries [1] that last for ~ 20+ years. SparkFun did a DIY Kit[2], but have sin
by schappim 5y ago
Folks interested in this, might be interested in the already available Tritium Batteries [1] that last for ~ 20+ years.
SparkFun did a DIY Kit[2], but have since discontinued it.
[1] https://citylabs.net/products/ https://citylabs.net/products/
[2] https://www.sparkfun.com/products/retired/14773 https://www.sparkfun.com/products/retired/14773