IR remote control ON OFF test (CB7820E)

Found in Radio Electronics from the 90s, this circuit produces pulses to test an infrared remote-control receiver.

| Clique na imagem para ampliar |

Analog Multimeter N 201 (CB18869E)
This is the circuit of the N-201 commercial multimeter of the analog type. The circuit is from...
Differential Light Sensor (CB11589E)
This circuit detects light variations using two LDRs as sensors. Operational amplifiers and...
Bandpass filter with two operational (CB20939E)
This circuit makes use of two transconductance operators. We found it in National Semiconductor...