SCR Rain or Leak Alarm (CB22097E)

This sensitive circuit was found in old documentation. The SCR can be any of the 106 series and the transistor a BC548.

Handbook of Electronics Formulas and Calculations - Volume 1
Author: Newton C. Braga Published:Aug, 2016 Formato:Book and e-Book Pages:...
Ground-Referenced Constant Current power Supply (CB25616E)
Unlike the previous circuit, this circuit from Electronics Now, October 1993, has the load...
Touch Switch (CB6447E)
This circuit was suggested by Motorola in a 1969 publication. It makes use of components of the...