40W Voltage Inverter (CB25375E)

This powerful inverter provides a high-quality sine wave signal. I found it in a Radio Electronics issue from April 1991. The output power is 40W

| Clique na imagem para ampliar |

Ambient light indicator (CB21567E)
This circuit uses an LDR as a sensor to trigger an LED indicator at a preset lighting level. The...
Light Controlled Tone Generator (CB18637E)
We found this circuit in an American publication from the 80's translated into Portuguese. The...
Perforated Tape Reader (CB16920E)
We found this circuit in an old French documentation from the 70s, but it can be assembled using...