*WARNING* This design needs to be revised if you intend to use interrupts for the encoders. I will rework the entire thing to address a few issues, se be warned if you base your design on it.
MSP430-based voltage and current adjustable power supply. Aiming for 0-12V, 0-1A, but can easily be modified for higher voltages and currents. No pre-tracking switchmode for now, might be a good idea for h...
These are transformerless power supplies that can feed 5V circuits with current consumption ranges from 20-30 mA to 80-100 mA. Check the C or R values and the configurations.
You can simulate to measure supplied voltage and current. The model for Zener diode is on schematics for it.
Change values and get your needed output current.
The bridged capacitive version worked fine for a 50mA circuit...
Conversion old unregulated Tandy power supply to regulated 9 and 5 volt output.
Has also the little Voltage Sensor on board.
A new life for this power supply after 35 years, spending most of it in the attic. Had only a transformer,
capacitor and rectifier bridge. It had a fuse a long time ago ... Mostly all recycled parts with some new in the mix.
**Old pic (from ebay, no picture ta...
The circuit described in this page represents a variable power supply based on the integrated LM 317, the PCB measures 28x47 mm.
Once assembled, all the only calibration required will be to change the value of Trimmer P1 until the desired value is obtained. In case the integrated unit should heat up, a cooling fin must be installed.
[For more information](https://www.adrirobot.it/elettronica/lm317...
This circuit uses the Buck/Boost Converter circuit for typically for use in a lab bench power supply. It features both adjustable voltage AND current using potentiometers.
Without a buck/boost converter,a computer power supply can only provide a 3.3V, 5V and 12 supply lines. With the buck/boost converter created with the aid of a 555 timer, adjustable voltage is allowed. A simple transistor is us...