Variable-scale voltmeter from 1.25 to 10 V (CB25452E)

The circuit shown with the LM3914 was found in the March 1992 issue of Radio Electronics magazine. The circuit has a full-scale adjustment.

| Clique na imagem para ampliar |

4W x 500kHz transmitter (CB21803E)
We found this 4W transmitter in a Mullard transistor manual from 1960. The circuit is powered by...
Treble Booster (CB12010E)
The response curve of this circuit has a maximum boost of around 6 kHz. The vertical scale is in...
Audible Indicator for Car (CB26291E)
Using the 555 this circuit was found in a Popular Electronics from the 90's. The circuit directly...