This battery circuit provides a charging current of 500 mA depending on the solar panel. The switching circuit is from a National Semiconductor documentation from the 90s.
This beat frequency oscillator or BFO was found in an American 1980s documentation. The circuit is...
We found this setting in the Texas Instruments opto-electronics manual. The bipolar can be the...
This bistable control uses a 4069 as bistable. The circuit can drive relays up to 100 mA with the...