TechCrate 003 — Breadboard Beethoven

Build a pushbutton piano on a breadboard. Use a 555 timer, resistors and capacitors to produce different speaker tones when you press the keys.

• 1 × 555 timer chip
• 6 × 1K resistors
• 1 × 4.7K resistor
• 1 × 0.1µF (104) capacitor
• 1 × 10µF capacitor
• 6 × pushbuttons
• 1 × 8-ohm speaker

Breadboard, 9V battery, Battery snap connector, Jumper wires.

Subscriber instructions PDF · Build video and customer files

Optional: compare the key resistor values with power disconnected and explore how they relate to pitch. The complete build and its checks work without a meter.

ProTechTrader Large Screen Digital Multimeter PDM-711