This is the receiver for the previous circuit, also found in 90s Radio Electronics. The circuit operates at 2.25 MHz, detecting variations in signal frequency due to the Doppler effect.
This simple, unregulated power supply is indicated for non-critical projects that require currents up...
This circuit is suitable for isolating audio signals, as it has very low distortion. The used...
This circuit was designed to work with the previous one in triggering a relay by the sounds picked up...