wagiminator / ch32x035-usb-pd-tester Goto Github PK

View Code? Open in Web Editor NEW

105.0 3.0 10.0 2.48 MB

USB Power Delivery Testing Device and Variable Power Supply

Home Page: https://oshwlab.com/wagiminator/ch32x035-usb-pd-tester

License: Other

C 99.00% Makefile 1.00%

ch32x035 oled pcb power-supply project risc-v usb usb-pd power-delivery

ch32x035-usb-pd-tester's Issues

PD 3.1 EPR support

Great project!
Do you plan supporting USB PD 3.1 EPR profiles {28, 36, 48}V ?
There are several 140W = 28V * 5A power bricks on the market right now to test.

Suggest changing U2 from an LDO to a zener diode

Suggest changing U2 from an LDO to a zener diode, as the operating current of U1 is less than 5mA, and the LDO seems a bit wasteful. After replacing U2 with a zener diode, the power supply cost decreases from ¥0.48 to ¥0.09.

An example of zener diode:
https://item.szlcsc.com/20275478.html?fromZone=l_c__%2522catalog%2522

LCD supply voltage

Hi @wagiminator
Are you sure that the LCD could be powered from 5V?

OLED warning

Hi,
I just build this device. Worked on first try! (nice job)

Sort of.

The OLED exists in multiple variants. I2C and SPI. While i bought the correct one 4pin, the pinout was VCC GND I2c i2c. Your pinout is GND VCC I2c I2c.

Probably worth mentioning for people interested in building.

(or maybe add 2 0R resistors on bottom that can be mounted as || or = depending on source of oled)

Recommend Projects