Found in a 90s R-E Experimenter Handbook, this circuit has a greater gain than the previous one for presenting two stages. The integrated circuit used is uncommon today.
We found this circuit in the magazine Eletcronics Now of July 1994. The power supply is according to...
This simple circuit produces a tone when triggered by any vibration picked up by the sensor. The...
In the figure we show how two diodes can be used to simulate the center tap of a push-pull driver step....