12V Switched-mode Power Supply Reverse-Engineered, Modified for 5-15V Variable Output with Voltmeter Display
This video – and accompanying blog post – by Lindsay Wilson is impressive. In it he shows and explains the steps for modifying a SMPS to deliver variable voltage, with an extensive analysis of the power supply circuit, along with reverse-engineering the PCB, removing native components, adding a new feedback divider, fitting a voltmeter display onto the supply chassis, and more.
I’ve taken a 12V 33A power supply and modified the feedback network to provide a fully adjustable 5-15V. I’ve also traced out the entire schematic. A full description of operation and details of the modification are available on my website at the link below.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.