Voltage level detector (CB21504E)

This circuit was found in a 1966 EEE. The circuit can be implemented with modern general-purpose transistors.

Electric Fence (CB17629E)
Although this version of electric fence is quite sophisticated due to the number of components it uses and...
28 to 5 V Converter (CB26336E)
Using the M1575 this switching converter was found in National Semiconductor documentation from...
Headlight Wiper Interval 1 (CB6049E)
This circuit was obtained from a 1985 Electronic Desing. The circuit uses a Darlington which may be...