Temperature Based Fan Speed Control And Monitoring Using Arduino
This project is a standalone automatic fan speed controller that controls the speed of an electric fan according to the requirement. Use of embedded technology makes this closed-loop feedback-control system efficient...
Magnet Operated Toggle Switch
When the author decided to develop a magnet operated toggle switch, what he had had in mind was an ‘unorthodox’ design that was as simple and sensitive as possible. Admit it,...
TRAFFIC CONTROLLER
This simple traffic controller can be used to teach children rudiments of traffic rules.
The circuit (shown in Fig. 1) uses readily available components. It mainly comprises rectifier diodes (1N4001), a 5V...
1Hz Precision Clock Timer
This timer makes an LED flash once every second along with a beep. The timing circuit uses a quartz crystal available in digital watches or clocks which generates precise frequency of...
Voltage Based Controller For Switches
Here’s a simple voltage based controller circuit for controlling four switches from a distance through just a pair of wires.
Voltage based controller circuit
In the circuit, the inverting inputs (pin 2) of...
Analogue Wattmeter
Unlike current or voltage measurement, the measurement of power is somewhat inconvenient as power is the product of voltage (V) and current (I) flowing through a dissipative circuit.
In a linear-moving coil...
Digital Stop Watch
Here’s a digital stop watch built around timer IC LM555 and 4-digit counter IC with multiplexed 7-segment output drivers (MM74C926).
IC MM74C926 consists of a 4-digit counter, an internal output latch, npn...
Smart Cellphone Guard
Smart cellphone guard presented here is in fact a simple infrared (IR) sensor alarm secures your cellphone with an invisible beam of light that will trip an alarm if anyone tries...
Convert 12V DC To 9V DC Using IC LM2576
You may already have on hand a 12V AC/DC adaptor or 12V from your PC or 12V battery, but you need a 9V, 2.5A DC power supply for your embedded system....
Medium-Power FM Transmitter
The range of this FM transmitter is around 100 metres at 9V DC supply.
The circuit comprises three stages. The first stage is a microphone preamplifier built around BC548 transistor. The next...
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In analogue electronics, oscillators and their implementation using integrated circuits (ICs) is an important subject. As 555...
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Creating A Chat Bot With Recast.AI
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