Timer circuit diagrams

Periodic Timer

A switched timer with equal make and equal space periods timing adjustable from over 6 minutes to 38 minutes.

24 Second Shot Clock

This is a circuit intended to be used in basketball shot clock.

Bedside Lamp Timer

30 minutes operation Blinking LED signals 6 last minutes before turn-off

One second Audible Clock

A beep or metronome-like click and/or a visible flash, will beat the one-second time.

24 Second Shot Clock Mk 2

A new 24 second countdown timer from Milardo. The circuits uses fast 74LS schottky IC's