VU meter with LM3914 (CB24653E)

This audio level indicator was found in October 1980 Radio Electronics magazine. See the table with the dB values of the indicated signals.

| Clique na imagem para ampliar |

Crystal Radio (CB14727E)
This circuit is from a 1957 Raytheon transistor manual. The diode can be of general-purpose...
Low Voltage Protector (CB4146E)
The circuit shown in the figure shuts off a load when the voltage drops below the value determined...
Siren (CB4381E)
This circuit was obtained from an English magazine from 1976. The signal from the circuit should be...