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2 layersRiscy, the printed circuit board in 3D

A development board based on risc5

Copper layers
2
Thickness
1.6 mm
Parts
36
Nets
43
Pads
182
Tracks, vias
407, 15
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
26 Jan 2025
Updated
5 Dec 2025

Overview

Riscy is an open-source printed circuit board by siliwho, from the siliwho/Riscy repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board with 36 parts on 43 nets, routed with 407 tracks and 15 vias.

It is built around the ESP32-C3-WROOM-02-H4, FT231XS-R and AMS1117-3.3, with the MMBT2222A among its other parts. Its parts include 12 resistors, 10 capacitors, 3 ICs, 3 connectors and 2 diodes. It belongs with the microcontroller boards boards and the ESP32 and RISC-V boards of this library.

Main components

4

README

README.md

RISCY

I am bulding a devboard using esp32-c3 for risc 5 architechture.

Module

  • esp32-c3 02 :- https://robu.in/product/espressif-esp32-c3-wroom-02-n4-module/

USB slave to UART

  • usb to uart link x1:- https://robu.in/product/ft231xs-usb-to-full-handshake-uart-ic/
  • usb c 3.1 female buy link x1 :- https://sharvielectronics.com/product/16-pin-c-type-usb-connector-smd-package/

Automatic Bootloader mechanism

  • here is the blog covering this topic: https://medium.com/@kazutaka.yoshinaga/esp32-understanding-the-automatic-boot-loader-mechanism-and-truth-table-68c4dcfd081b
  • BJT link x2 :- https://robu.in/product/mmbt2222-npn-transistor-pack-of-15/

Reset and Boot buttons

tact-switch-tvbp06-6-0x3-5mm

  • 4 pin tactile switch x2 :- https://sharvielectronics.com/product/6x6x6mm-4-pin-smd-push-button-switch-black-smd-package/?srsltid=AfmBOoqkUntN9e5Ccbb3nGcXEwSu-7Jxecq2lp09xIixMuHtoX-pbkdE

Programable LED

  • link to buy x1 each:-
    • https://robu.in/product/1206-surface-mount-led-white-50-pcs/
    • https://robu.in/product/0805-surface-mount-led-green-50-pcs/
    • https://robu.in/product/1210-surface-mount-led-red-50-pcs/

Voltage Regulator

  • link to buy x1:-
    • https://robu.in/product/ams1117-3-3v-1a-sot-223-voltage-regulator-ic-pack-of-5-ics/?gad_source=1&gclid=Cj0KCQiAhvK8BhDfARIsABsPy4iSbVYHEwlP9KEBU2B-lCpn-yx6If_Pfp03lKlFopRlRfcGBhBD0BAaAo5wEALw_wcB

Schematics

Schematics

Capacitors

  • 47 pf (1206) x2 https://robu.in/product/1206cg470j102nt-fh-smd-multilayer-ceramic-capacitor-47-pf-1k-v-1206-3216-metric-%C2%B1-5-c0g-np0/

  • 1uf (0805) x1 https://robu.in/product/1uf-1000nf-50v-capacitor-0805-smd-package-pack-of-10/?gad_source=1&gclid=CjwKCAiAqfe8BhBwEiwAsne6gRW89rA8-Swm024kPMmwT7c9DuGJLPZeQFsVlMFR-OqpyiHtYQ1T4hoC8iMQAvD_BwE

  • 0.1uf (0603) x4 https://robu.in/product/0-1uf-capacitor-smdc-0603/?gad_source=1&gclid=CjwKCAiAqfe8BhBwEiwAsne6gWn9uzvhnW72vBLiLfLgH6g2IBu4aXkYyNnVniyPnGsfjDwM305cGxoC8nkQAvD_BwE

  • 10uf (0805) x1 https://robu.in/product/10uf-10000nf-25-v-capacitor-0805-smd-package-pack-of-10/?gad_source=1&gclid=CjwKCAiAqfe8BhBwEiwAsne6gSNCd9WapUePWtNVtayLgPHIMiImB_SQO5EiwIjBxiPgrBeaZvYwxxoCuBgQAvD_BwE

  • 22uf (0805) x2 https://robu.in/product/yageo-22uf-25v-electrolytic-capacitor-5-x-11mm/?gad_source=1&gclid=CjwKCAiAqfe8BhBwEiwAsne6gWyHPdNbx2DJMTqJMZTA1229QODbWIoOOmdcEkEg3BOqxQL2i1x2ehoCttgQAvD_BwE

Resistors

  • 10k (1206) x3 https://robu.in/product/yageo-10k-ohm-1-4w-1206-surface-mount-chip-resistor-pack-of-50/?gad_source=1&gclid=CjwKCAiAqfe8BhBwEiwAsne6gZWv9w5e9PMNmgXxTNiYDh80E5rCTzmXLJArUMoy2vFAzwSFBDGwHRoCKAUQAvD_BwE
  • 2k (0603) x1 https://robu.in/product/rc0603fr-072kl-yageo-res-thick-film-0603-2k-ohm-1-0-1w1-10w-%C2%B1100ppm-c-pad-smd-t-r/?gad_source=1&gclid=CjwKCAiAqfe8BhBwEiwAsne6gWDPpM3FZ68ny4cKiBX4H2pzpEQgQKrVqhm_9OjcrVDXVOdlWZfx0RoCqCEQAvD_BwE
  • 5.1k (1206) x1 https://robu.in/product/rc1206fr-075k1l-yageo-res-thick-film-1206-5-1k-ohm-1-0-25w1-4w-%C2%B1100ppm-c-pad-smd-t-r/?gad_source=1&gclid=CjwKCAiAqfe8BhBwEiwAsne6gRqt6TucMgg01SNZ5VyACSfpWdVqewY8vab5gWvl6FbrrHuYexlRzxoCukMQAvD_BwE
  • 22k (1206) x3 https://robu.in/product/22k-ohm-1-4w-1206-surface-mount-chip-resistor-pack-of-100/?gad_source=1&gclid=CjwKCAiAqfe8BhBwEiwAsne6gS6hBlgg2iVJp858rXo21lLIIVadU-xK-fzI3kwSm3MWMYYFXDwUsBoCjh4QAvD_BwE
  • 27 (0805) x2 https://robu.in/product/rc0805fr-0727rl-yageo-smd-chip-resistor-27-ohm-%C2%B1-1-125-mw-0805-2012-metric-thick-film-general-purpose/
  • 1 (1206) x2 https://robu.in/product/1-ohm-1-4w-1206-surface-mount-chip-resistor-pack-of-100/?gad_source=1&gclid=CjwKCAiAqfe8BhBwEiwAsne6gYzLEAPAPqUGiqb02MYLoErwIDmVYmgq0LpQvgXpQUw6lDAnweQhTRoCmqYQAvD_BwE

PCB editor

alt text

3D view

alt text

Parts

36
QtyValueFootprintReferences
40.1uCapacitor_SMD:C_0603_1608MetricC2, C4, C7, C11
310kResistor_SMD:R_1206_3216MetricR1, R10, R11
322kResistor_SMD:R_1206_3216MetricR4, R5, R12
21Resistor_SMD:R_1206_3216MetricR6, R7
222uCapacitor_SMD:C_0805_2012MetricC9, C10
227Resistor_SMD:R_0805_2012MetricR8, R9
247pCapacitor_SMD:C_1206_3216MetricC5, C6
2Conn_01x15_PinConnector_PinHeader_2.54mm:PinHeader_1x15_P2.54mm_VerticalJ1, J2
2MMBT2222APackage_TO_SOT_SMD:SOT-23Q1, Q2
2SW_MEC_5Esources:SW_1825910-6-4SW1, SW3
2~Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mmJP1, JP2
110uCapacitor_SMD:C_1206_3216MetricC3
11uCapacitor_SMD:C_0805_2012MetricC1
12kResistor_SMD:R_0603_1608MetricR2
15.1kResistor_SMD:R_1206_3216MetricR3
1AMS1117-3.3Package_TO_SOT_SMD:SOT-223-3_TabPin2U4
1ESP32-C3-WROOM-02RF_Module:ESP32-C3-WROOM-02U3
1FT231XSPackage_SO:SSOP-20_3.9x8.7mm_P0.635mmU2
1LEDLED_SMD:LED_0805_2012MetricD5
1LEDLED_SMD:LED_1206_3216MetricD4
1USB_C_Receptacle_USB2.0_14PConnector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_HorizontalJ3

Questions

What parts does the Riscy use?

36 parts, built around the ESP32-C3-WROOM-02-H4, FT231XS-R, AMS1117-3.3 and MMBT2222A. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Riscy KiCad files?

From the siliwho/Riscy repository on GitHub, at the commit this page was made from: the board is riscy.kicad_pcb and its schematic riscy.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Riscy design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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