This is a sound generator based on general purpose timer IC 555. A flip-flop circuit is included, so this circuit will give sound output and blinking LED.? There are 2 modules in this circuit that are […]
Category: Fun Circuits
Two Tone Train Horn based NE556 Dual Timer
This is the circuit diagram of two tones train horn which built based dual timer IC NE556. The circuit is quite simple and easy to built and of course inexpensive. The circuit diagram is in a […]
7 Segment LED Digital Clock with IC MM5314N
This is the circuit diagram of digital clock based on IC MM5314N. The clock display uses 6 pieces of 7 Segment LED with format HH:MM:SS. The power supply for this circuit already included, so you can […]
Metronome Sound Generator
This is the electronic circuit diagram of metronome sound generator. The circuit featured adjustable volume and beats/minute with potentiometers. LED used to be a beat indication. The circuit powered with 9V DC voltage, a 9V battery […]
Clap On / Off Switch
This is the circuit diagram of Clap On / Off Switch. The circuit allows you to operate your lighting or any circuit device which use 24V / 3A maximum supply, simply by clapping your hands.?It has […]
Traffic Baton with Bulb or LED Flasher
This is the traffic baton circuit which available in two versions that are traffic baton with LED flasher and traffic baton with bulb flasher. Both the circuits powered with a 6V, 4.5Ah rechargeable battery, which is […]
Electronic Dice Based Microcontroller Atmel AT89C2051
This is the circuit diagram of electronic dice which built based microcontroller chip of Atmel AT89C2051. The application of this electronic dice is similar to the one used in a game of dice. The circuit generates […]
Electronic Stopwatch
The above simple circuit design can be utilized as an accurate stopwatch to count up to 100 seconds with a determination of 0.01 second or up to 1000 seconds with a determination of 0.1 second. This […]
Ding-Dong Door Bell
This ding-dong door bell circuit might become the simplest and cost-effective door bell circuit. The circuit is designed based on single IC 8021-2 which manufactured Formox Semiconductors. It is an 8-pin DIP (Dual Inline Package) IC […]
Simple Mat Alarm Switch
This easy to built circuit produces a warning beep when somebody crosses a secure area in your home or place of work. The transfer, hidden beneath the ground mat, causes the alarm whilst the individual walks […]