RING BELL ELECTRONIC CIRCUIT USING NE555 DIAGRAM
This circuit produces oscillating frequency around 1kHz, and able to be converted by changing the value of resistor R1. The speaker will produce a long beep sound with 1kHz frequency. Here is the schematic :
Parts list :
- Resistor R1 : 10k ohm
- Resistor R2 : 56k ohm
- Capacitor C1-C2 : 0.01 uF
- Polar capacitor C3 : 1 uF/15V
- IC timer : NE 555
- Speaker : 8 ohm 0.5 W
- ON/OFF switch
- 5-15V Power supply
