This is 0-30V Transistor Based Variable Power Supply Circuit which gives adjustable output voltage and maximum current is around 2A. The main power transistor is 2N3055 and it works as series pass transistor in the circuit. Since, it is linear type regulator the output is smooth and stable. Therefore, it is good for lab testing […]
Power Supply Circuits
2N3055 Based 12V DC Voltage Regulator Circuit
This post is for simple 2N3055 Based 12V DC Voltage Regulator Circuit, which gives stable 12V output and is useful for power supply projects. For example, battery charger, amplifier supply, small lab supply and this circuit is easy to build. The circuits components are with low cost and easily available. Basically, this regulator works as […]
Switch Mode LED Driver Circuit using Transistors
Nowadays, LED is used everywhere, its used in display, in indicator and for decoration purpose also. But LED needs proper current, so if we connect LED direct to battery then it may get damage. So, in this post we have designed a Switch Mode LED Driver Circuit using Transistors. This circuit is simple as it […]
12V Boost Converter Circuit from 3.3V to 5V Supply
Nowadays, many electronic projects need higher voltage. However, the available supply is very low for example 3V or 3.3V batteries are common. But many circuits need 12V so, here we have designed a 12V Boost Converter Circuit from 3.3V to 5V Supply. This circuit increases low DC voltage to high DC voltage and therefore, it […]
Boost Converter Circuit From 5V to 12V using Transistors
Many electronic projects need 12V power, but sometimes only 5V supply is available, for example from USB, logic board or microcontroller. So, here this Boost Converter Circuit From 5V to 12V using Transistors is useful which converts 5V DC to 12V DC. It uses simple components like transistors and inductor, it is with low cost […]
Simple 12V Power Supply Circuit with Filter Capacitor
Today, many electronic circuits need DC power, but main supply is AC power, so we must change AC to DC. Therefore, this Simple 12V Power Supply Circuit with Filter Capacitor is needed, as this circuit gives 12V DC output and current capacity is up to 2A. This circuit is very simple, easy to make, cost […]