Motorola Waris series S-meter
Ludo | 11 février 2018Although the following design is not revolutionary at all, it still has the benefit of fulfilling its primary function and bringing back memories of electronics courses about op amps. Moreover, it does not need any specific measuring tool for the calibration process. You’ll need something to generate a strong RX signal though, like your kid’s PMR talkie-walkies, in order to set the full range signal reading. |