Timing and oscillator circuit diagrams / circuit schematics

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There are 79 circuit schematics available in this category. Click here for all circuit diagrams. The Last circuit was added on Saturday, January 28, 2023.Please note some adblockers will suppress the schematics as well as the advertisement so please disable if the schematic list is empty.

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Circuit	Category	Date Added	Votes
Egg timer circuit diagram, PCB layout and assembly information	Timing		1
Simple Sine Wave Oscillator including a PCB layout	Timing	Sep 23, 2024	-6
Direct Digital Synthesis VFO for HF Bands - based on Analog Devices AD7009 DDS (PDF)	Timing	Oct 05, 2024	-1
Continuous Coverage V.F.O. for H.F. (PDF)	Timing	Oct 05, 2024	-2
PCB exposure countdown timer based on an Atmel ATtiny2313	Timing	Jun 28, 2024	1
Long Time Period Automatic Timer	Timing	Oct 25, 2024	-2
Trangular wave generator	Timing	Mar 23, 2024	0
Triangle / Squarewave Generator using a 1458 dual opamp	Timing	Oct 21, 2024	1
3 - 12 MHz Signal Generator	Timing		1
Signal Frequency Beat Frequency Oscillator	Timing		0
Wide-swing Variable Crystal Oscillator	Timing		0
CA4060B Timer Circuits	Timing	Sep 10, 2024	-2
Special Function Timer Circuits (LM555)	Timing	Sep 10, 2024	2
10MHz GPS disciplined frequency standard	Timing	Jun 19, 2024	-1
Simple WWV receiver for 10 MHz calibration signal	Timing	Apr 12, 2024	-1
DDS/PLL based VFO synthesizer	Timing	Oct 07, 2024	0
Timer circuit based on a 14536 and 4011 CMOS chips that can be calibrated using a frequency counter	Timing	Jan 31, 2025	0
Audible timer that can be used as a cooking timer for roasting peanuts for example	Timing	Jan 31, 2025	-1
Selection of 14 oscillator circuits include sinewave, audio, logic and LED flashers	Timing	Feb 20, 2025	-1
Function Generator Sine / Triangle / Square / Saw / Burst Sweep Noise based on PIC16F870	Timing	May 16, 2024	-1
455KHz oscillator using FET and 455KHz IF transformer	Timing	May 25, 2024	1
Build a synchronous clock locked to the mains frequency	Timing	Aug 18, 2024	0
AF variable frequency generator using 555 IC	Timing		0
Crystal switcher using diodes	Timing		1
IC oscillator 1...30MHz using 74LS04 chip	Timing		2
Simple AF-oscillator / signal generator using pair on 2N2222 transistors	Timing		1
Digital clock based on 74 series logic	Timing		0
Weston Voltmeter Clock	Timing		0
Binary clock using LED matrix to display a binary clock with 6 digits of 4 binary bits each	Timing		0
Digital clock that receives and displays the time from the Rugby MSF radio transmission (PIC16F877)	Timing		-2
Line powered 60Hz clock generator (PDF)	Timing	Jan 26, 2025	0
Micro-power pulse generator (PDF)	Timing	Jan 26, 2025	0
Divide by 1.5 counter (PDF)	Timing	Jan 26, 2025	1
High-output square wave generator (PDF)	Timing	Jan 26, 2025	0
D Flip-flot one-shot circuits (PDF)	Timing	Jan 26, 2025	1
Equivalent circuit and SPICE model of 555 timer	Timing	Apr 11, 2024	0
Op Amp Triangle-Wave Generator circuit diagram and SPICE simulation files	Timing	Jan 17, 2025	0
Wien Bridge Oscillator with SPICE simulation	Timing	Mar 26, 2024	-1
Triangle / Square wave generator	Timing	Feb 21, 2025	0
Binary clock circuit diagram	Timing	Aug 18, 2024	0
Experimental DDS frequency synthesizer uses the AD9851	Timing	Oct 08, 2024	-1
LED matrix clock circuit diagram	Timing	Aug 18, 2024	1
Panel-mounting clock circuit diagram	Timing	Aug 18, 2024	0
Sidereal clock project with circuit diagrams	Timing	Aug 18, 2024	1
Simple Function Generator using TL084 or other opamp	Timing		-2
Micropower pulse generator (PDF)	Timing	Jan 26, 2025	0
Simple GPS Stabilised 10 MHz Oscillator	Timing		1
DCF-77 PIC LED clock (DCF77 is the name of a German radio station on 77.5 KHz)	Timing	Jun 27, 2024	0
24" Wall Clock	Timing		0
Sleep Timer	Timing		0
Super VXO	Timing		0
High Precision GPS/TV controlled Reference Oscillator	Timing	May 01, 2024	0
TV based Receiver for a Standard Frequency Generator	Timing	May 01, 2024	0
AD9852 DDS schematic	Timing	Feb 14, 2025	0
Decimal DDS Signal Generator	Timing		0
Build A 100Khz Crystal Calibrator	Timing		0
Crystal heater / temperature stablization circuit (TXCO)	Timing		-1
A GPS receiver based frequency standard	Timing	Mar 23, 2024	0
Long duration timer using 4060 12-stage binary ripple counter	Timing	Aug 17, 2024	0
Clock generator	Timing	Jan 26, 2025	0
555 Timer Tutorial + Circuits	Timing	Jan 26, 2025	0
All-Ears QSK Timing Generator	Timing	May 19, 2024	-1
Monostable multivibrator	Timing	Jan 01, 2025	0
GPS-based universal clock generator	Timing		0
VCO covers 300MHz to 500MHz based on Maxim MAX2608 VCO	Timing		0
Push Button Switch Debouncer	Timing	Jan 26, 2025	0
5 to 30 Minute Timer circuit diagram	Timing	Nov 27, 2024	1
NE555 Basic Monostable	Timing	Nov 27, 2024	0
Clock project based on National Semincondutor MM5402N	Timing	Jul 05, 2024	0
A universal XCO/PLL Board that replaces crystal oscillator modules	Timing	Jul 03, 2024	0
MEMS oscillator evaluation board for SiT8008/SiT8208/SiT8209 from SiTime	Timing	Jul 03, 2024	0
Homebrew DDS Generator (with AD9851) V2.0	Timing	Jul 03, 2024	1
Perfect Sinus 1 kHz Oscillator	Timing	Sep 07, 2024	0
600 MHz to 2.2GHz VCO	Timing	Sep 14, 2024	0
800 MHz to 2.2GHz Push-Pull VCO	Timing	Sep 14, 2024	0
Two-Tone Audio Generator - M0DGQ	Timing	Sep 28, 2024	0
Pure Sine-Wave Wien Oscillator	Timing	Oct 17, 2024	1
1 kHz Quadrature Oscillator	Timing	Oct 22, 2024	0
400 kHz - 30 MHz Low Noise X-tal Oscillator - DJ2LR	Timing	Oct 29, 2024	0