(specifically versions like or 1.4 ) is a rite of passage for many hardware hackers and repair technicians. Whether you're trying to unbrick a motherboard, unlock a "turbo boost" on a locked BIOS, or just experiment with EEPROMs, this little $5 device is indispensable.
Set your multimeter to DC volts. Probe between VCC and GND on the clip. Must read 3.3V. Probe MOSI and GND – should also be 3.3V. If 5V, do not proceed.
These tools are available at various retailers, often bundled with test clips for in-circuit programming:
Most modules have a jumper to switch between "UART" (serial) and "Programmer" (I2C/SPI) modes. For BIOS flashing, ensure the jumper is set to the Programmer pins. 2. Software: The "1.31 Free" and Beyond
Usb Drive Ch341 3 1 -
(specifically versions like or 1.4 ) is a rite of passage for many hardware hackers and repair technicians. Whether you're trying to unbrick a motherboard, unlock a "turbo boost" on a locked BIOS, or just experiment with EEPROMs, this little $5 device is indispensable.
Set your multimeter to DC volts. Probe between VCC and GND on the clip. Must read 3.3V. Probe MOSI and GND – should also be 3.3V. If 5V, do not proceed.
These tools are available at various retailers, often bundled with test clips for in-circuit programming:
Most modules have a jumper to switch between "UART" (serial) and "Programmer" (I2C/SPI) modes. For BIOS flashing, ensure the jumper is set to the Programmer pins. 2. Software: The "1.31 Free" and Beyond
