There are 92 circuit schematics available in this category. Click here for all circuit diagrams. The Last circuit was added on Thursday, 3 September 2015.Please note some adblockers will suppress the schematics as well as the advertisement so please disable if the schematic list is empty.

Filter schematics by description:

CircuitCategoryDate AddedOK?Votes 
Egg timer circuit diagram, PCB layout and assembly informationTiming Status2 vote up vote down
Digital Clock with Alarm Using DS1307TimingMar 25, 2009Status2 vote up vote down
Digital timer with 7-segment display and pushbuttonsTimingMar 25, 2009Status0 vote up vote down
Simple Sine Wave Oscillator including a PCB layoutTimingSep 23, 2009Status-1 vote up vote down
Direct Digital Synthesis VFO for HF Bands - based on Analog Devices AD7009 DDS (PDF)TimingOct 05, 2009Status-1 vote up vote down
Continuous Coverage V.F.O. for H.F. (PDF)TimingOct 05, 2009Status-1 vote up vote down
PCB exposure countdown timer based on an Atmel ATtiny2313TimingJun 28, 2011Status0 vote up vote down
Long Time Period Automatic TimerTimingOct 25, 2014Status0 vote up vote down
Trangular wave generatorTimingMar 23, 2015Status0 vote up vote down
Triangle / Squarewave Generator using a 1458 dual opampTimingOct 21, 2009Status0 vote up vote down
3 - 12 MHz Signal GeneratorTiming Status0 vote up vote down
Signal Frequency Beat Frequency OscillatorTiming Status0 vote up vote down
Wide-swing Variable Crystal OscillatorTiming Status0 vote up vote down
CA4060B Timer CircuitsTimingSep 10, 2006Status0 vote up vote down
Special Function Timer Circuits (LM555)TimingSep 10, 2006Status0 vote up vote down
10MHz GPS disciplined frequency standardTimingJun 19, 2011Status0 vote up vote down
Simple WWV receiver for 10 MHz calibration signalTimingApr 12, 2014Status0 vote up vote down
DDS/PLL based VFO synthesizerTimingOct 07, 2009Status1 vote up vote down
Timer circuit based on a 14536 and 4011 CMOS chips that can be calibrated using a frequency counterTimingJan 31, 2010Status-1 vote up vote down
Audible timer that can be used as a cooking timer for roasting peanuts for exampleTimingJan 31, 2010Status0 vote up vote down
Selection of 14 oscillator circuits include sinewave, audio, logic and LED flashersTimingFeb 20, 2010Status0 vote up vote down
Function Generator Sine / Triangle / Square / Saw / Burst Sweep Noise based on PIC16F870TimingMay 16, 2010Status0 vote up vote down
455KHz oscillator using FET and 455KHz IF transformerTimingMay 25, 2012Status0 vote up vote down
Build a synchronous clock locked to the mains frequencyTimingAug 18, 2009Status0 vote up vote down
AF variable frequency generator using 555 ICTiming Status0 vote up vote down
Crystal switcher using diodesTiming Status0 vote up vote down
IC oscillator 1...30MHz using 74LS04 chipTiming Status0 vote up vote down
Simple AF-oscillator / signal generator using pair on 2N2222 transistorsTiming Status0 vote up vote down
Digital clock based on 74 series logicTiming Status0 vote up vote down
Two nixie display clockTiming Status0 vote up vote down
VFD (vacuum flourescent display) clockTiming Status0 vote up vote down
Single-digit Nixie clockTiming Status0 vote up vote down
Oscilloscope CRT ClockTiming Status0 vote up vote down
Weston Voltmeter ClockTiming Status0 vote up vote down
Binary clock using LED matrix to display a binary clock with 6 digits of 4 binary bits eachTiming Status0 vote up vote down
Digital clock that receives and displays the time from the Rugby MSF radio transmission (PIC16F877)Timing Status0 vote up vote down
Line powered 60Hz clock generator (PDF)TimingJan 26, 2001Status0 vote up vote down
Micro-power pulse generator (PDF)TimingJan 26, 2001Status0 vote up vote down
Divide by 1.5 counter (PDF)TimingJan 26, 2001Status1 vote up vote down
High-output square wave generator (PDF)TimingJan 26, 2001Status0 vote up vote down
D Flip-flot one-shot circuits (PDF)TimingJan 26, 2001Status0 vote up vote down
Equivalent circuit and SPICE model of 555 timerTimingApr 11, 2011Status0 vote up vote down
Op Amp Triangle-Wave Generator circuit diagram and SPICE simulation filesTimingJan 17, 2011Status0 vote up vote down
Wien Bridge Oscillator with SPICE simulationTimingMar 26, 2011Status0 vote up vote down
Clock dividerTimingJan 26, 2001Status0 vote up vote down
Clock doublerTimingJan 26, 2001Status0 vote up vote down
CMOS oscillator using 74C14 inverting Schmitt triggerTimingJan 26, 2001Status0 vote up vote down
Crystal 32.768KHz CMOS OscillatorTimingJan 26, 2001Status0 vote up vote down
Crystal oscillator using a CMOS or HCMOS inverterTimingJan 26, 2001Status0 vote up vote down
Cheap 40KHz clock using one gate of a 74C14TimingJan 26, 2001Status0 vote up vote down
Astable 40KHz clockTimingJan 26, 2001Status0 vote up vote down
'Rounding Off' a square waveTimingJan 26, 2001Status0 vote up vote down
Switch debounce using 555TimingJan 26, 2001Status0 vote up vote down
Square wave to sine wave converterTimingJan 26, 2001Status0 vote up vote down
Triangle / Square wave generatorTimingFeb 21, 2005Status0 vote up vote down
Binary clock circuit diagramTimingAug 18, 2009Status0 vote up vote down
Experimental DDS frequency synthesizer uses the AD9851TimingOct 08, 2009Status0 vote up vote down
LED matrix clock circuit diagramTimingAug 18, 2009Status0 vote up vote down
Giant nixie clock circuit diagramTimingAug 18, 2009Status0 vote up vote down
Panel-mounting clock circuit diagramTimingAug 18, 2009Status0 vote up vote down
Sidereal clock project with circuit diagramsTimingAug 18, 2009Status0 vote up vote down
Simple Function Generator using TL084 or other opampTiming Status0 vote up vote down
Micropower pulse generator (PDF)TimingJan 26, 2001Status0 vote up vote down
Simple GPS Stabilised 10 MHz OscillatorTiming Status1 vote up vote down
xTimer V1.0 a 4-Channel Timer based on a 89C4051 + MAX7219 display driverTimingApr 22, 2014Status0 vote up vote down
xTimer using CMOS shift register 4094 for driving 7-segment LED directlyTimingApr 22, 2014Status0 vote up vote down
Ice Tube Clock - Vacuum fluorescent display (VFD) clockTimingOct 12, 2009Status0 vote up vote down
DCF-77 PIC LED clock (DCF77 is the name of a German radio station on 77.5 KHz)TimingJun 27, 2010Status0 vote up vote down
DCF77 PIC16F84A Single-Nixie clock (DCF77 is the name of a German radio station on 77.5 KHz)TimingJun 27, 2010Status0 vote up vote down
24" Wall ClockTiming Status0 vote up vote down
Sleep TimerTiming Status0 vote up vote down
Super VXOTiming Status0 vote up vote down
High Precision GPS/TV controlled Reference OscillatorTimingMay 01, 2004Status0 vote up vote down
TV based Receiver for a Standard Frequency GeneratorTimingMay 01, 2004Status0 vote up vote down
AD9852 DDS schematicTimingFeb 14, 2003Status0 vote up vote down
Decimal DDS Signal GeneratorTiming Status0 vote up vote down
Build A 100Khz Crystal CalibratorTiming Status0 vote up vote down
Crystal heater / temperature stablization circuit (TXCO)Timing Status0 vote up vote down
A GPS receiver based frequency standardTimingMar 23, 2003Status0 vote up vote down
Long duration timer using 4060 12-stage binary ripple counterTimingAug 17, 2009Status0 vote up vote down
Clock generatorTimingJan 26, 2001Status0 vote up vote down
555 Timer Tutorial + CircuitsTimingJan 26, 2001Status0 vote up vote down
All-Ears QSK Timing GeneratorTimingMay 19, 2015Status0 vote up vote down
Monostable multivibratorTimingJan 01, 2003Status0 vote up vote down
GPS-based universal clock generatorTiming Status0 vote up vote down
Homemade scope clock using a DG7 tube and a Microchip PIC16F876Timing Status0 vote up vote down
VCO covers 300MHz to 500MHz based on Maxim MAX2608 VCOTiming Status0 vote up vote down
Push Button Switch DebouncerTimingJan 26, 2001Status0 vote up vote down
Square wave oscillator using CMOS 4011 NAND chipTimingJan 26, 2001Status0 vote up vote down
5 to 30 Minute Timer circuit diagramTimingNov 27, 2002Status0 vote up vote down
NE555 Basic MonostableTimingNov 27, 2002Status0 vote up vote down
Clock project based on National Semincondutor MM5402NTimingJul 05, 2015Status0 vote up vote down