Peedee
About the Peedee PCB
Peedee is an open source PCB design by JBlitzar, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 16 × 42.5 mm, with 17 components from 10 distinct parts.
Other key parts include the FRC0805F1002TS and CH224K. By type, the board carries 5 ICs, 5 diodes, 2 resistors, 1 connector, 1 switch and 1 LED.
It belongs with the power & battery designs in this gallery.
From the project
USB-C power delivery board
It's a USB-C power delivery board. It uses just a bare CH224k with no MCU or other ICs, but it also offers convenience through its user interface, which allows users to select voltage levels without needing to look at a complex silkscreen lookup table. Instead, I used a diode-matrix ROM to convert one-hot encoded voltage selections into the proper signals for the three binary configuration lines. The schematic is deceptively simple-- I had to translate the datasheet and invent the diode ROM. One unexpected tricky part of this project was resistor sorting. This is because peedee, as per the…
Main components on the Peedee
Peedee bill of materials (BOM)
17 components, 10 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | FRC0805F1002TS 10k FOJAN(富捷) | R0805 | U1, U3, U4, U5 |
| 1 | CH224K WCH(南京沁恒) | ESSOP-10_L4.9-W3.9-P1.0-LS6.0-TL-EP | U2 |
| 1 | Conn_02x05_Odd_Even | PinHeader_2x05_P2.54mm_Vertical | J2 |
| 1 | TIMR-05-T-V-T/R Diptronics(圜达) | SW-SMD_TIMR-05-T-V-T-R | SW1 |
| 1 | TYPE-C 16PIN 2MD(073) TYPE-C 16PIN 2MD SHOU HAN(首韩) | USB-C-SMD_TYPE-C-16PIN-2MD-073 | USB1 |
| 1 | KT-0805G 0805G KENTO | LED0805-R-RD | LED1 |
| 5 | 1N4148W ~ JSMSEMI(杰盛微) | SOD-123_L2.8-W1.8-LS3.7-RD-1 | D6, D7, D8, D9, D10 |
| 1 | CL10A105KO8NNNC 1uf SAMSUNG(三星) | C0603 | C1 |
| 1 | FRC2010F1001TS 1k FOJAN(富捷) | R2010 | R1 |
| 1 | 0603WAF2700T5E 270Ω UNI-ROYAL(厚声) | R0603 | R2 |
Peedee design files
The KiCad project lives in the JBlitzar/peedee repository on GitHub; these links point at the commit this page was built from.
Peedee: common questions
How big is the Peedee PCB?
The Peedee measures 16 × 42.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Peedee?
17 components, from 10 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Peedee design files?
From the JBlitzar/peedee repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Peedee design in my own project?
Yes, under the terms of its GPL-3.0 license, which JBlitzar chose for the repository.
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