Position: Index > Oscillator Circuit >

Use the LM386 as the sine wave oscillator circuit

2016-08-22 00:44  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.

The driver alcohol detection alarm controller circuit is as shown in the figure. The QM-NJ9 is alcohol gas sensor, if it detects the alcohol odor, the resistance of QM-NJ9 between A and B will shrink, and the wiper potential of potentiometer RPl will rise up. When the voltage level is 1.6V, the ICl high-power switching device TWH8778 is connected to make the IC2 voice IC TM801 to work, the output is amplified by the IC3 integrated amplifier LM386, and then the amplified output drives the speaker BLl to send out alarm.