Clocks, Timers & Counters
Electronic Circuits for Hobby and Fair Projects


Home Experiments Science Fair Projects
Electronic Circuits
C=Circuit Diagram
Zener Diode Tester (555 timer) [C]
Periodic Timer [C]
Asymmetric Timer [C]
24 Hour Timer [C]
555 Pulse Generator [C]
1 Hour Timer [C]
Sequential Timer [C]
Build a Timed Burglar Alarm [C]
7 Segment LED Counter [C]
72 LED Clock [C]
NE555 Basic Monostable [C]
5 to 30 Minute Timer (7555 ) [C]
Adjustable 1-10 Minute Timer Project (555) [C]
NE555 Monostable [C]
Useful Links
R=Resource
Electrical Safety [R] [R]
Electronics Project Books

                   

Electronic Circuits
Lights & LEDs
Alarms
Sound Effects
Cars & Motorcycles
Computers / PC
Detectors & Sensors
Electronics Games
Audio & Sound
Clocks & Counters
Power Supplies
Radio
Telephone
Control & Interface
Test Equipment
Miscellany

Electronics Discoveries and Inventions
Heinrich Hertz: Radio Waves
Guglielmo Marconi: Radio
Radio and Wireless Patents
Bell: Telephone Invention
The Invention of the Transistor
Konrad Zuse: Relay Computer
The Oil-Drop Experiment

Electricity Projects Famous Electro Scientists



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Last updated: January 2017
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