High Power Alarm (CB20475E)

We found this circuit in a Popular Electronics from the 90's. The circuit uses three SCRs to trigger the loads.

100 kHz and 1 MHz Frequency Standard (CB14797E)
We found this circuit in old American documentation. It can be implemented with more modern...
Electrolytic Capacitor (CB18928E)
This circuit was found in European documentation from the 1980s. It uses the network frequency to test...
MAX40000 nanoPower Comparator
June 2017 - Mouser Electronics already has Maxim's new nanoPower MAX4000 comparators in stock with an...