LiPo charging circuit tutorial. Converting ATX Power Supply to Lab Bench Power Supply » Jumper One. A Digital DC Power Supply (programmable bench power supply unit), hardware version 3.0. Introduction This bench power supply unit is less complex than most other circuits but has a lot more features: The display shows the actual measurement values for voltage and current. The display shows the pre-set limits for voltage and current. Only standard components are used (no special chips). Only one power source is needed (no separate negative supply voltage for operational amplifiers or control logic)You can control the power supply from a PC. The basic electrical design idea Let's start with the simplest possible electronically stabilized power supply. The output voltage of this circuit is Uref - 0.7V. What are the problems with this circuit?
The transistor will die when there is a short circuit on the output. To overcome those problems you need some "intelligence" which will regulate the current on the output and a variable reference voltage. For the last few decades people have used operational amplifiers to provide this intelligence. Testing.
ATX psu turned into an adjustable voltage bench supply. Constant Current Source Project - Hacked Gadgets - DIY Tech Blog. Bench Power Supply 0-25v @ 0-5amp « MicroSyl | MCU Electronics projects. History This project is like the one that all of you must have done in electronics. I took the idea from Circuit Cellar. The original power supply provides an output of 2.5-15V at 500mA. This circuit will provide 0-25V at 0 to 5A. This is my second version of this power supply, the first one was made with mosfet who need a higher voltage on the gate I had to use a higher input voltage and because of this there was a lot of heat generated for nothing. I will explain you some part of this power supply. I also connect to this power supply a LCD to inform you of the set point for voltage and current, plus the current voltage and current. Features Output Voltage adjustable from 0 to 25vOutput Current adjustable from 0 to 5ampDigital reading of set points for current & voltage and output current & voltage.No need of multi tap transformer or center tap transformerShort circuit protectedVery low cost Pictures Download PowerSupply Schematic Graph LCD Schematic Graph LCD Source Code.
MintyBoost - The mysteries of Apple device charging.