Mouse and Rat repellent circuit using astable multivibrator
The Mouse and Rat repellent circuit using astable multivibrator which use sound waves or ultrasonic so it escaped away. Use transistor and piezoelectric.
10 Comments
June 21, 2017
The Mouse and Rat repellent circuit using astable multivibrator which use sound waves or ultrasonic so it escaped away. Use transistor and piezoelectric.
The cricket sound effect circuit which is an another Sound effects generator byLM324 op-amp and emit by a buzzer. And they have sound similarly the cricket
Here is The 4 Sound effects generator using UM3561 and a few parts only. It can make siren, Ambulance sirens, Police car sirens, Fire truck siren and Space
This is police siren circuit using 555 IC, with PCB layout, using 2 IC-555 as frequency oscillators and transistor to drive sound to the speaker [...]
Here is the tone generator circuit,it is small size. I use IC digital CMOS 4011 quad NAND gate.