Timing, oscillators etc. (schematics)

  • Budget timer
  • Long period timer
  • 555 time delay circuit
  • Low frequency clock
  • Countdown timer with relay
  • DDS using AD9835
  • 1 Second Time Base From Crystal Osc.
  • Power-On Time Delay Relay Circuit
  • Low Voltage , High Current Time Delay Circuit
  • Power-Off Time Delay Relay Circuit
  • Generating a Delayed Pulse With a dual 555 Timer
  • 1KHz Sinewave generator
  • Timed beeper
  • Time Delay Relay
  • Time Delay Relay
  • Circuit that momentarily closes a pair of contacts at long intervals
  • Onboard Fogger Timer
  • Colpitts 1 to 20 MHz Crystal Oscillator
  • Divide By 1-1/2 Circuit
  • Simple sinewave generator
  • Two Transistor Sine Wave Oscillator
  • 10 Hz to 10 Khz VCO with Square and Triangle wave
  • Line powered 60Hz clock generator (PDF)
  • Micro-power pulse generator (PDF)
  • Darkroom camera shutter timer
  • Divide by 1.5 counter (PFD)
  • High-output square wave generator (PDF)
  • D Flip-flot one-shot circuits (PDF)
  • Clock divider
  • Clock doubler
  • CMOS oscillator
  • Crystal 32.768KHz CMOS Oscillator
  • Crystal oscillator
  • Cheap 40KHz clock
  • Stable 40KHz clock
  • 'Rounding Off' a square wave
  • Switch debounce using 555
  • Square wave to sine wave converter
  • Bedside lamp timer
  • Sun tanning timer
  • Digital Stopwatch 0-99sec
  • Digital Stopwatch 0-60sec
  • 28 LED clock timer
  • Photo timer circuit
  • Day / Night / 24 Hour Select Sensor
  • One transistor timer
  • Variable timer
  • Micropower pulse generator (PDF)
  • Square wave oscillator
  • Triangle wave oscillator
  • Sawtooth wave oscillator
  • Sine/Cosine wave oscillator
  • 555 timer
  • 555 oscillator
  • Stable multivibrator (IC)
  • Stable multivibrator (Transistor)
  • Push Button Switch Debouncer
  • Square wave oscillator
  • 5 to 30 Minute Timer
  • NE555 Basic Monostable
  • Mini DDS (Direct Digital Synthesis)
  • Astable Multivibrator
  • High Precision GPS/TV controlled Reference Oscillator
  • TV based Receiver for a Standard Frequency Generator
  • AD9852 DDS schematic
  • A GPS receiver based frequency standard
  • Monostable multivibrator
  • Clock generator
  • 555 Timer Tutorial + Circuits
  • Versatile electronic timer