Free Simple Circuit Diagram
Below is a comparator circuit which is can measure with step of 1 volt, the voltage of car battery. The indication of voltage is done by comparison of battery voltage with the reference set by D1. This voltage is applied to the inverting inputs of amplifiers with to compare the battery voltage. We can regulate the gradation of voltage that […]
Read more
The circuit diagram below shows a circuit of graphic equalizer 6 band of regulation. The potentiometer RV1-6 regulates each band, and the sliding type is the recommended for better visual indication. . The gain is null (flat) in the center position of potentiometer, but in the maximum and minimum position has +/- 15 dB, boost or cutting off, respectively. It […]
Read more
Below is a classic circuit of regulation of tone of three way. With this circuit, we can regulate low, mid and high frequencies of acoustic signal. We can regulate the boost/cut in the range of +- 18 dB/oct. The supply on the the circuit is 15V, but it can be supplied with 9 until 30V. It’s enough to connected pin […]
Read more
The mains supply can be conveniently reduced with no heat dissipation by the reactance of C1; then rectified by D1 (1N4007) and D2 (1N4007) and clamped to 24V by the Zener Diode D3 (24V) due to the very low current consumption of this circuit. The built-in microphone pick-up the music diffused by the loudspeaker(s) of any type of media player […]
Read more