SCR Alarm oscillator (CB6114E)

This circuit was suggested by General Electric in a 1965 documentation. The circuit can be implemented with equivalent SCR.

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Simple Audio Amplifier (CB10324E)
This circuit is from a Poptronics, American magazine of August 2000. The circuit can be assembled with...
Amplifier TDA2003 (CB17075E)
This is the normal configuration for the TDA2003 integrated circuit, an amplifier that can provide 10...
12 V x 700 mA supply (CB20181E)
This stabilized source can supply currents up to 700 mA and the output voltage is close to 15 V. a...