Electronic Drums Simulator Circuit

Do anyone want to play drums but do not have full drum kit?

This Electronic Drums Simulator Circuit work like small electronic drum.

It uses smart parts to make drum sound like kick and snare.

Sound come from electronics and not from real drum.

Can make sound using things like relaxation oscillator like build and drop sound or twin T oscillator which is another sound maker.

Circuit Working:

Parts List:

This circuit uses two twin-T oscillators.

They use transistors Q1, Q2 BC547 with some resistors and capacitors.

Twin-T good for stable sound.

In this circuit they are almost ready to start but just need small push.

When we touch the pad it connect base of transistor to ground.

Then transistor start working and it turns ON the oscillator.

Each oscillator make different drum sound depending on parts used.

We can change pitch tone using two 25k pots like P1 and P2.

To play just touch a pad it make that drum sound come from speaker.

Touch pads becomes fast one after other to make drum beats.

For drum roll slide finger across pads quickly which will make fast drum sound.

Formulas:

This circuit use special setup of resistors, capacitors and transistors to make Twin-T oscillator.

It makes steady sound at set frequency.

Twin-T use feedback parts R1, C1, C2 to keep sound going.

These parts decide the frequency.

It works using positive feedback.

Formula for frequency (f in Hz) is:

f = 1 / 2πRC

where:

• R is resistance and here in this circuit it is pot P1
• C is capacitance and in this circuit it is C1 and C2 = 4.7nF capacitors like C3

Note:

This design is good for making sound in electronic drums.

We can change frequency by changing R or C to get different drum sounds.

How to Build:

To build a Electronic Drums Simulator Circuit follow the below mentioned steps:

Transistors Connections:

• Q1 BC547 base goes to touch pad, collector goes to point between R2 47k and C2 4.7nF and emitter goes to ground.
• Q2 BC547 base goes to touch pad, collector goes to point between R7 47k and C4 22nF and emitter goes to ground.

Resistors Connections:

• R1 100k connects from 9V battery + to circuit.
• R2 47k connects between base of Q1 and C2 4.7nF.
• R5 22k goes to output.
• R7 47k connect between base of Q2 and C4 22nF.
• R8 47k connects from collector of Q2 to output.

Capacitors Connections:

• C1 10nF connect from R2 47k to ground.
• C2 4.7nF connect between Q1 collector and R2.
• C4 22nF connect between base of Q2 and R7.

Note:

• Always check wiring before turning power ON.
• Use right parts for our voltage.

Conclusion:

Electronic Drums Simulator Circuit is fun and helpful project to learn electronics.

Not very real in sound but good to understand how sound is made by circuits.

References:

Electronic drum