Reverse
About the Reverse PCB
Reverse is an open source RISC-V PCB design by eutectic6337, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 50 × 50 mm, with 26 components from 4 distinct parts.
Its main chip is the CH32V003F4U6, from the RISC-V family. By type, the board carries 16 diodes, 8 resistors, 1 IC and 1 capacitor.
From the project
a challenge coin with blinky lights
Feature: Using 8 PWM channels to provide dimming function for 16 LEDs by connecting pairs in anti-parallel between a PWM pin and a GPIO.
built as a stack of 3 PCBs - components mounted on top of bottom board, second board has a cutout to fit a battery and for each mounted component, and top board has holes to transmit light from LEDs
finished coin to have [relatively] smooth top and bottom
Main components on the Reverse
Reverse bill of materials (BOM)
26 components, 4 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CH32V003F4U6 | QFN-20-1EP_3x3mm_P0.4mm_EP1.65x1.65mm | U1 |
| 16 | LED | LED_0402_1005Metric | D1, D2, D3, D4, D5, D6, D7, D8 +8 |
| 1 | 1uF | C_0402_1005Metric | C1 |
| 8 | 22R | R_0402_1005Metric | R1, R2, R3, R4, R5, R6, R7, R8 |
Reverse design files
The KiCad project lives in the eutectic6337/coin1 repository on GitHub; these links point at the commit this page was built from.
Reverse: common questions
What microcontroller does the Reverse use?
The Reverse is built around the CH32V003F4U6, from the RISC-V family.
How big is the Reverse PCB?
The Reverse measures 50 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Reverse?
26 components, from 4 distinct parts. The full bill of materials is listed on this page.
Where can I download the Reverse design files?
From the eutectic6337/coin1 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Reverse design in my own project?
Yes, under the terms of its CC0-1.0 license, which eutectic6337 chose for the repository.
Can I test firmware for the Reverse without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RISC-V firmware against it before you order a PCB.
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