Sometimes 7805 regulator is not enough, as it gives only around 1 amp current. However, many projects need more current for example motors, relays, LED strips and logic boards together. Therefore, we need a simple solution, so we used an external power transistor TIP42 with 7805 IC. This transistor boosts output current with this the […]
Power Supply Circuits
IC LM309 Based 5 Volt Power Supply Circuit
Today many electronic circuits need stable 5 volt DC supply. However, AC mains supply is very high, so voltage reduction is also required. Also voltage regulation is important and therefore a voltage regulator circuit is used. In this article, a simple IC LM309 Based 5 Volt Power Supply Circuit is explained. Moreover, the circuit is […]
5V 0.5A Regulated Power Supply Circuit
Power supply is the heart of any electronic circuit, without stable voltage the circuit will fail. Sometimes 7805 IC is not enough and also sometimes current requirement is higher. Therefore, discrete regulator is useful. This 5V 0.5A Regulated Power Supply Circuit gives 5V output at 0.5A current. It uses TIP3055 transistor and IC TL431 reference. […]
Transistor Based 5V Linear Power Supply Circuit
Power supply is very important in electronics and most electronic circuits need stable DC voltage. However, AC voltage comes from mains and therefore the conversion is required. This Transistor Based 5V Linear Power Supply Circuit gives regulated 5 volts DC. It uses simple components, gives high current and is useful for labs and projects. Circuit […]
5V Regulated Power Supply Circuit using Transistors
A 5V regulated power supply is very important in electronics as it is used to run many digital circuits, for example, microcontrollers, sensors and logic ICs. This 5V Regulated Power Supply Circuit using Transistors gives stable 5 volts DC output. It uses transistors for voltage regulation and so it can handle more current than IC […]
220V AC Live Detection and Interface Circuit
Handling 220V AC directly is very dangerous, but still we need to know mains is ON or OFF. So, this 220V AC Live Detection and Interface Circuit is useful as it solves this safety problem easily. This circuit senses mains voltage safely and it sends clean logic level signal. Optocoupler is used for isolation, so […]