Automotive bargraph voltmeter (CB20661E)

Based on the well-known LM3914, this circuit was found in an old American documentation. Trimpots adjust the scale limits.

| Clique na imagem para ampliar |

Pure sine generator (CB8429E)
Found in a Maxim publication from the 90s, this circuit generates signals from 10 to 25 kHz with a...
5 MHz oscillator with 250 kHz variation (CB13852E)
We found this oscillator in a documentation for radio amateurs from the 1970s. The circuit can use...
100 W Inverter (2) (CB13974E)
This circuit is a manual of 1972 RCA power transistors. The critical components of the project are...