What is it?

This is a DIY, USB PD powered, pocket sized adjustable DC / lab bench power supply for electronic makers. It features a 0.91 inch OLED display with real-time voltage and current information as well as indicator for CC / CV mode.

It has 2 USB type C port on its side, the top input port is used for connecting to an external 60W (20V 3A) USB PD power supply and the bottom port connects to the internal MCU with UART. The UART connection will print real-time voltage and current information for experiment / logging purpose.

Technical Specification

OSR+AVG or oversampling and averaging algorithm is used to make the number of effective bits (ENOB) increases beyond the ADC’s native resolution

HCCLAB vs IMUSLAB Variant

Due to the high difficulty in assembling, we have collabs with HCCLAB from Tainan,Taiwan to help with building this product. The HCCLAB version has a slightly optimized for budget design and part list. It have the same dimension, specification and features of the imuslab version, just a bit cheaper to make.

Why did you make it?

I have always been looking for the perfect bench power supply that is light weight / portable and modern (powered by USB PD with real time power information on some sort of display). However, I can only find two types of bench power supply on the market: the traditional bulky one and some "smart" power supply that require user to navigate multiple layer of menus just to set a current limit / voltage.

Since I really love the traditional knob-adjustment design and the modern PD power features from both worlds, I decided to wait a bit until the perfect power supply shows up, which never happened. That is why I decided to take the time and make one myself.

What makes it special?

• Traditional voltage / current adjusting knobs
• Modern type C PD powering and real-time information display
• Portable and lightweight
• Completely open source
• Replaceable OLED design (in case burn-in happened after some years of use)
• UART output real-time voltage and current info, suitable for automating lab-works or data collections

Buyer Notes

• Power supply voltage reading is not calibrated by default. You might need to fine tune the values in the firmware if high accuracy is needed.

• The power supply will come with a pairs of red & black cable w/ clips

• Chunghwa Post might change their shipping policy anytime. If you have concern about whether we can ship the product to your address / country, please contact us with email before purchase.