back to meters and sniffers

voltage to sound:


Use these example circuits to install a meter into a radio that either doesn't have a meter or doesn't have
a GOOD meter. Sound indication can be easier for novice players to use.

Linear response to a logarithmic signal level may not provide a good range of sensitivity.


555-vco.jpg

audible S-meter.png

KA6BFB audible s-meter.pdf

my SN74LS124N volt to sound.jpg (1169 KB)

vco chip data



last updated 11/30/2023 at 20:19:05