Solar flashlight (CB20488E)

This circuit charges a battery to power a flashlight at night. The circuit is from an English publication from 1991.

Non-linear amplifier (CB24008E)
In this circuit the gain decreases as the input signal intensity increases. The circuit is from a...
Programmable Twin T Band Pass Filter (CB6244E)
This circuit was found in an American 1980s documentation. Dual FETs can be replaced by single...
HDC1010 Digital Humidity Sensor (COM087E)
September 2016 - Mouser Electgronics already has in stock the new moisture digital sensor HDC1010...