Automatic Hand Dryer Circuit

T.K. Hareendran - 12/16/14

Now and again ardent hobbyists looking to add something special and individual to their rest room/bathroom want an [...]
Edge Triggered 555 Monostable Schematic

Edge-Triggered 555 Monostable Multivibrator

Jim Keith - 12/12/14

While the 555 oscillator IC is a very versatile device, it can also be quite tricky and solutions [...]
door opening alarm circuit

Door Opening Alarm with Sound Alert

Riju Thazhathuveettil - 08/14/14

The door opening alarm circuit or “Front Office Visitor Alert” is used for alerting you when a customer [...]
schematic door buzzer display

Two-Door Buzzer with Display

M.P. Valle - 07/04/14

The Two-door Buzzer with Display is applicable and well suited to be used in a house having two [...]
heater controller circuit

Dew Heater Controller For Telescope

T.K. Hareendran - 05/08/14

Dew (condensed moisture) is one of the astronomer's worst enemies, and all telescopes are subject to the dew [...]
led multicolor flashing globe circuit

Crazy Multicolor Flashing LED Globe!

T.K. Hareendran - 04/17/14

Nowadays, single-color and multi-color flashing LEDs are easily available, which obviates the requirement of external chips to produce [...]
zener diode tester circuit

Zener Diode Tester Circuit

T.K. Hareendran - 04/10/14

Diodes whose reverse-breakdown characteristics are controlled precisely during manufacture are called as Zener diodes and are intended specifically [...]
piezo trigger switch circuit

Piezo Trigger Switch Circuit

T.K. Hareendran - 04/05/14

Piezo Trigger Switch circuit described here is a microcontroller-compatible shock/impact sensor switch module works on 5VDC supply. The [...]
power failure alarm circuit

Power Failure Alarm

T.K. Hareendran - 02/17/14

This minuscule power failure alarm circuit is a power supply monitoring device that will set off a piezo-speaker [...]
sound activated motor

Fascinating Flowervase: Sound Activated Motor Driver

T.K. Hareendran - 02/11/14

If you are looking for an idea to build your own simple electronic gift, your search may end [...]
high power led dimmer circuit

High Power LED Dimmer Circuit

P. Marian - 02/07/14

I made this dimmer circuit because I have a cheap chinese LED lamp that doesn't have the option [...]

DIY Solar Boost Converter with MPPT Charge Controller

Jim Keith - 02/07/14

This is a simple solar boost converter and voltage limiter circuit that charges a 12V battery from a [...]
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