This circuit is from a 90s documentation. It has a hysteresis and uses a light sensing bridge. The circuit generates a 1000 Hz modulated 10 Hz signal. The signal must be applied to an amplifier.
June 2017 - NXP's new 4 Mbit capacity NXH5194 memories are available from Mouser Electronics...
We found this circuit in a Popular Electronics of the 90s. The circuit uses a touch sensor formed by...
This simple multimeter takes advantage of the low cost common galvanometer of 200 uA or 1 mA and...