5 to 30 Minute Timer

555 timer

555 time delay circuit

Budget timer

Countdown timer with relay (PDF)

D Flip-flop one-shot circuits (PDF)

Darkroom camera shutter timer (PDF)

Long period timer

Low frequency clock

Low Voltage , High Current Time Delay Circuit

MOSFET one transistor timer

Power-On Time Delay Relay Circuit

Power-Off Time Delay Relay Circuit

Time Delay Relay

Time Delay Relay II

Variable timer

Versatile electronic timer
 

555 oscillator

Astable multivibrator (IC)

Astable multivibrator (Transistor)

1 Second Time Base From Crystal Osc.

Clock divider

Clock doubler

Clock generator

Cheap 40KHz clock

Stable 40KHz clock

DDS (Direct Digital Synthesis)

Divide by 1.5 counter (PDF)

High-output square wave generator (PDF)

Line powered 60Hz clock generator (PDF)

Micro-power pulse generator (PDF)

Random noise generator

Sawtooth wave oscillator

Sine/Cosine wave oscillator

Square wave oscillator

Square wave oscillator

Triangle wave oscillator

Square wave to sine wave converter

'Rounding Off' a square wave

Electronic Components

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e-Gizmo

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