UPDI Programming Key - Sofirn SC21 (Style 2)
author: gchart
2 layer board of 0.43 x 0.81 inches (11.0 x 20.6 mm)
Uploaded:
August 19, 2022
Shared:
August 19, 2022
Total Price:
$1.75
Can be used with most USB to Serial TTL adapters. The standard CH340 adapters tend to be a great option (if it has an Rx LED, you may need to physically disable that). This programmer is my favorite as it doesn’t require any modifications. I usually order these as 0.8mm thickness option. I solder straight header pins flat to the board and then cover with clear heat shrink.
- R470 is a 0805-sized 470 Ohm resistor (or any value in that range)
- DIODE is a SOD-323 Schottky diode such as BAT54WS, 1N4148WS, or B5819WS
- Uses 3x P50-B1 pogo pins
- Heatshrink (optional but highly recommended)
Note, image of another UPDI adapter version
Can be used with most USB to Serial TTL adapters. The standard CH340 adapters tend to be a great option (if it has an Rx LED, you may need to physically disable that). This programmer is my favorite as it doesn’t require any modifications. I usually order these as 0.8mm thickness option. I solder straight header pins flat to the board and then cover with clear heat shrink.
- R470 is a 0805-sized 470 Ohm resistor (or any value in that range)
- DIODE is a SOD-323 Schottky diode such as BAT54WS, 1N4148WS, or B5819WS
- Uses 3x P50-B1 pogo pins
- Heatshrink (optional but highly recommended)
Note, image of another UPDI adapter version
