HardLabs

Prismo

nu31hackerspace·prismo·hardware/main/pcb.kicad_pcb

Prismo PCB layout, top view — open source ESP32 board by nu31hackerspace

About the Prismo PCB

Prismo is an open source ESP32 PCB design by nu31hackerspace, published on GitHub under the MIT license. It is a 2-layer board measuring 55 × 55 mm, with 27 components from 9 distinct parts.

Its main chip is the ESP32 C3 supper mini, from the ESP32 family. By type, the board carries 16 resistors, 4 diodes, 3 transistors, 2 ICs, 1 connector and 1 buzzer.

It belongs with the iot & wireless designs in this gallery.

From the project

Open-source $10 NFC/RFID door access controller for hackerspaces and makerspaces. ESP32-C3 + PN532, MQTT, Home Assistant, self-hosted

KiCad PCB design, STEP 3D models, and 3MF enclosure files for the Prismo NFC reader.

- kikad/ — KiCad project files (schematic + PCB layout) - body/ — 3D-printable enclosure files (3MF) - relay/ — Relay module design - .step — 3D assembly models for the ESP32-C3 Super Mini, PN532 NFC module, LED PCB, and full assembly

All parts, model in OnShape. You can export all geometry in prefer format (SLT, STEP, ...).

Main components on the Prismo

ESP32 C3 supper mini

Prismo bill of materials (BOM)

27 components, 9 distinct parts.

QtyPartRefs
1
ESP32 C3 supper mini
U1
1
~
U2
3
BC547
Q1, Q2, Q3
1
Conn_01x03_Socket
J3
1
Buzzer
BZ1
4
LED_RKGB
D1, D2, D3, D4
4
150
R1, R6, R9, R12
9
100
R2, R3, R4, R5, R7, R8, R10, R11 +1
3
1000
R14, R15, R16

Prismo design files

The KiCad project lives in the nu31hackerspace/prismo repository on GitHub; these links point at the commit this page was built from.

Prismo: common questions

What microcontroller does the Prismo use?

The Prismo is built around the ESP32 C3 supper mini, from the ESP32 family.

How big is the Prismo PCB?

The Prismo measures 55 × 55 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Prismo?

27 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the Prismo design files?

From the nu31hackerspace/prismo repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Prismo design in my own project?

Yes, under the terms of its MIT license, which nu31hackerspace chose for the repository.

Can I test firmware for the Prismo without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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