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Configurable RS232 To TTL To I2C Adaptor
RS232 signals cover a much longer distance than standard TTL and I2C signals. Also, RS232 signals have better noise immunity. RS232 is a well-known standard supported by many popular integrated...
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Solar Light For A Portable Toilet
Fig. 1: Proposed toilet system Despite being more expensive than standard permanent outdoor toilets, portable toilets (Fig. 1) have several significant benefits as these are self-contained and can be...
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Low-Cost Dusk-Dawn Controller
Fig. 1: Author’s prototype: (a) dawn mode, (b) dusk mode and (c) prototype Solar streetlights can be easily integrated with a dusk-dawn controller by simply employing a pnp transistor and a few...
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Low-Cost LPG Leakage Detector
The circuit for an LPG leakage detector is readily available in the market, but it is extremely expensive and usually based on a microcontroller (MCU). Presented here is a low-cost circuit for an LPG...
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Electronic Thermostat For Fridge
A thermostat is a standard equipment for sensing temperature of a system and maintaining it at a pre-defined point. It is a regular feature in air-conditioners, room heaters and refrigerators. Although...
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Infrared Motion-Sensing Relay Switch
This circuit is designed for use with all kinds of medium-power automobile/domestic 12V DC loads. It is a simple solid-state relay (SSR) switch, controlled by a standard passive infrared (PIR) motion...
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RGB Colour Generator
Fig. 1: Concept of primary colour mixing Presented here is a red, green and blue (RGB) colour generator using AT89C2051 microcontroller (MCU). This is a simple and low-cost circuit for a multiple...
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Plus-minus 5V Supply From 9V Battery
Op-amps require dual-polarity supply for proper operation. When working with battery supply, it becomes difficult to get dual power supply for the op-amps. Presented here is a simple circuit that...
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PIN Diode Based Fire Sensor
Here is an ultra-sensitive fire sensor that activates an alarm when it detects fire. Thermistor based fire alarms have a drawback; the alarm turns on only if the fire heats the thermistor in close...
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High-Impedance Audio Buffer With JFET
The buffer circuit described here can be used to enhance the AC input impedance of audio amplifiers that are used with pickups in musical instruments. Some signal sources for preamplifiers, passive...
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Restaurant Menu Ordering System
Automation systems are increasing in day to day life. Applications like home and industrial automation reduce man power while increasing the efficiency. Here in this project let us see how automated...
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Arduino For Atmega32
Arduino is very helpful for people who have little knowledge of programming or electronics. The user does not need to understand the hardware or the low level coding of the AVR controller. Arduino is...
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Automatic Anchor Light
Federal and international regulations require boats to carry lights between sunset and sunrise and during conditions of restricted visibility. The number and colours of the lights vary with the size of...
View ArticleTop 20 Raspberry Pi Project Ideas For The Engineer In You
Raspberry is a development board that has made a lot of noise since its introduction to the public. The cost and the wide support community has further added to the wide range of applications this...
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Arduino-Based FM Receiver
This project is an FM receiver circuit radio based on Philips TEA5767 digital radio-receiver module. The radio receiver uses I2C interface with Arduino UNO development board. The TEA5767 module offers...
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Electronics Projects: Power Bank for Smartphones
This power bank can be used for charging smartphones. The circuit uses two integrated modules and a lithium-ion battery. The first module is a lithium-ion battery charger and the second is a DC-DC...
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Simple FM Receiver
Contents What is a FM receiver? FM receiver components list FM receiver circuitry More projects What is a FM receiver? A radio receiver is an electronic device that receives radio waves and converts...
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IR Remote Control for Home Appliances
Most remote controls around us, use IR for signal transmission. An IR remote control for home appliances helps you connect to your decices at ease and operate them from the comfort of your bed or your...
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Intelligent Water Pump Controller with Water-level Display
Most of the circuits for intelligent level controller for water in tanks employ a bunch of wires running between the circuit and the overhead tank, which accounts for almost half the cost of the entire...
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555 Timer PWM Audio Amplifier
The “555” integrated circuit is a general-purpose timer useful for a variety of functions. In this 555 audio PWM project, we explore its use as an astable multivibrator. The ubiquitous 555 timer IC...
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