Door buzzer or alarm (CB20492E)

This solar powered circuit was found in a 1991 documentation. The transistor is a general purpose NPN.

Shift Register Using the 4013 (CB156E)
This is a Serial In - Parallel Out or Serial Out [SIPO or SISO] shift register using the...
How to Test IGBTs (INS045E)
IGBTs are widely used in frequency inverters, power controllers, switched sources and DC/DC...
Over the Top Current Sensor (CB5379E)
This High Side Current Sensor was found in a 2005 Linear Technology manual. The current sensing...