Selective Light Amplifier (CB25488E)

This IR light sensor circuit was found in the July 1992 issue of Radio Electronics magazine. It is tuned for 20 kHz modulated light.

| Clique na imagem para ampliar |

Tachometer with the LM3900 (CB4030E)
The circuit presented is from the Motorola Linear Databook of 1990. The integrated circuit is a...
Test for LEDs and Microlamps (CB17277E)
This is a circuit for testing small lamps and LEDs. The lamps that can be tested are the ones...
Modulated Oscillator (CB18237E)
This TTL circuit generates an 18 MHz signal modulated at 300 Hz. Its main use is as a test...