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Engineering Projects For You

Free engineering project ideas, circuit diagrams and software codes for students and hobbyists. Complete instructions on DIY electronic devices. EFY tested circuits with source codes.

TELEPHONE RECEIVER

This simple telephone receiver without a dialling section can be connected in parallel to a telephone line. It can be easily assembled on a small vero board or a PCB. A...

POWER-SUPPLY FAILURE ALARM

Most of the power-supply failure indicator circuits need a separate power-supply for themselves. But the alarm circuit presented here needs no additional supply source. It employs an electrolytic capacitor to store...

REMOTE-CONTROLLED POWER- OFF SWITCH

Remote controllers for various audio/ video systems are usually provided with a power ‘on’/‘off’ or standby-mode selector button. But turning the system off from the remote handset actually does not cut...

TELEPHONE LINE BASED AUDIO MUTING AND LIGHT-ON CIRCUIT

Very often when enjoying music or watching TV at high audio level, we may not be able to hear a telephone ring and thus miss an important incoming phone call. To...

LOW-COST PCO BILLING METER

The circuit presented here can be used in PCOs for displaying the actual bill. The comparative disadvantages of the presented circuit are as follows: 1. The calculator used along with this circuit...

40-METRE DIRECT CONVERSATION RECEIVER

Using the circuit of direct-conversion receiver described here, one can listen to amateur radio QSO signals in CW as well as in SSB mode in the 40-metre band.The circuit makes use...

DIGITAL MAINS VOLTAGE INDICATOR

Continuous monitoring of the mains voltage is required in many applications such as manual voltage stabilisers and motor pumps. An analogue voltmeter, though cheap, has many disadvantages as it has moving...

ULTRA LOW DROP LINEAR REGULATOR

The circuit is a MOSFET based linear voltage regulator with a voltage drop of as low as 60 mV at 1 ampere. Drop of a fewer millivolts is possible with better...

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LATEST SOFTWARE PROJECTS

USB Interface Using Python Software

This is a simple transistor’s output characteristic curve-tracer program through the interfacing of USB and PIC microcontroller...

Top 20 Computer Engineering Projects

Computer Engineering Projects
Computer engineering is a discipline that integrates several fields of electrical engineering and computer science required to...

Ultrasonic Distance Meter Using Raspberry Pi 2

Ultrasonic ranging module HC-SR04 provides 2cm to 400cm non-contact distance measurement range. Its accuracy can reach ±3mm...

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