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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.

FM BOOSTER

Here is a low-cost circuit of an FM booster that can be used to listen to programmes from distant FM stations clearly. The circuit comprises a common-emitter tuned RF preamplifier wired...

FASTEST FINGER FIRST INDICATOR

Quiz-type game shows are increasingly becoming popular on television these days. In such games, fastest finger first indicators (FFFIs) are used to test the player’s reaction time. The player’s designated number...

MAGNETIC PROXIMITY SWITCH

Here is an interesting circuit for a magnetic proximity switch which can be used in various applications.The circuit, consists of a reed switch at its heart. When a magnet is brought...

ECONOMICAL PUMP CONTROLLER

The automatic pump controller eliminates the need for any manual switching of pumps installed for the purpose of pumping water from a reservoir to an overhead tank (refer Fig.1). It automatically...

SIMPLE SOLDERING IRON TEMPERATURE REGULATOR

Soldering irons are available in different wattage and usually run at 230V AC mains. However, these have no temperature control. Low-voltage soldering irons (e.g., 12V) generally form part of a soldering...

VERSATILE CMOS/ TTL LOGIC AND CLOCK PROBE

For fault diagnosis of any logic circuit, you need a probe that can test the logic level or existence of clock activity. The circuit shown here can be used to test...

ELECTRONIC SCORING GAME

You can play this game alone or with your friends. The circuit comprises a timer IC, two decade counters and a display driver along with a 7-segment display.The game is simple....

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...