Timer IC 555 is low cost high performance and very popular IC and is used in most circuit. In this website we have posted various electronic project using ic 555. Now here, is a simple project using 555 which gives hour of entertainment.
The circuit of drummer is build around NE555 followed by few passive components. The circuit posted here is simply triggering circuit whose time is adjusted by variable resistor VR1. The two capacitor C1, C2 is connected to trigger pin (pin 2) of IC1. The output is taken from pin 3 and is given to 8-ohm speaker through capacitor C2 and C4.
The output of this circuit taken from pin 3 and is connected to positive terminal of two parallel capacitors C3 and C4. This circuit gives very good drum sound like in disco and jazz music. Capacitor C1 & C2, and C3 & C4 is replaced by two 20 µF capacitors.
This circuit is also useful for musician who wants to practice music at constant rhythm. The rhythm can be carried through VR1.
PARTS LIST OF SIMPLE DRUMMER USING TIMER IC 555
|Resistor (all ¼-watt, ± 5% Carbon)|
|R1 = 1.2 KΩ
VR1 = 100 KΩ
|C1 – C2 = 10 µF/16V|
|IC1 = NE555|
|LS1 = 8 Ω Loud Speaker|