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Category: Mini Projects
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Convert 220V AC to 12V DC Without a Transformer
Normally, transformers are used to step down voltage from high AC voltage to a lower level before converting it to…
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Simple Fire Alarm with Heat Sensor (Thermistor) and Transistor
This simple fire alarm circuit uses a heat sensor to detect high temperatures and alert you with an LED and…
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AC to DC Converter: Converting 220V AC to 12V DC
An AC to DC converter changes alternating current (AC) from the power outlet into direct current (DC) that can be…
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Clap Switch: Controlling a Light with Sound using the 555 Timer and CD4017 ICs
This project explains how to build a clap switch—an electronic circuit that toggles a light bulb ON or OFF based…
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Water Tank Level Indicator with Buzzer to Prevent Overflow
This project outlines how to build a simple and effective Water Tank Level Indicator that uses LEDs to show the…
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Smoke Detector Project
This simple smoke detector project uses two main ICs: the MOC7811 optical sensor and the LM358 operational amplifier. It can…
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Automatic, Touchless Hand Sanitizer Dispenser
This project creates a device that automatically pumps sanitizer when you place your hand near it—no touching needed! It uses…
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Non-Contact AC Voltage Detector with Mobile USB and CD4017
This project lets you detect the presence of AC voltage using a small circuit connected to a mobile device via…
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Build Your Own Portable Speaker with Bass using the CD4440 IC
This project helps you build a compact, portable speaker system with enhanced bass sound. It amplifies audio signals to drive…
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Automatic Mobile Charger with Power Cutoff
Are you worried about leaving your mobile phone plugged in overnight? Overcharging and battery overheating are common concerns for most…