SM1155 series

NIPPON PRECISION CIRCUITS—4

One-shot (SM1155

×××3S)

When TG goes HIGH, a single melody play starts. Melody play continues until the melody ends, even if TG

goes open circuit or LOW mid melody. However, if the TG input goes HIGH again during melody play, the

melody play restarts from the beginning.

1 TUNE

Oscillator

OUT

TG

1M

Ω

270k

Ω

Pull-down resistance

270k

Ω

1M

Ω

270k

Ω

1 TUNE

1M

Ω 1MΩ

270k

Ω 270kΩ

From the begining