HardLabs

DevRam

Danjovic·MSX·DevRamCart/circuit/rev-/DevRam.kicad_pcb

DevRam PCB layout, top view — open source ESP32 board by Danjovic
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About the DevRam PCB

DevRam is an open source ESP32 PCB design by Danjovic, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 100 × 64.7 mm, with 36 components from 18 distinct parts.

Its main chip is the ESP32-C3_SUPERMINI, from the ESP32 family. Other key parts include the 74AHC541, 74HC595, HM62256BLP and 74AHCT595. By type, the board carries 12 resistors, 9 capacitors, 7 ICs, 2 transistors, 2 connectors and 2 diodes.

It belongs with the retro computing designs in this gallery.

From the project

Coletânea de projetos para MSX

1) - Cartucho Caps Lock para Expert, descrito em http://danjovic.blogspot.com/2016/10/cartucho-caps-lock-para-expert.html

Main components on the DevRam

74AHC54174HC595HM62256BLP74AHCT595

DevRam bill of materials (BOM)

36 components, 18 distinct parts.

QtyPartRefs
3
74AHC541
U1, U5, U6
2
74HC595
U2, U7
1
HM62256BLP
U3
1
74AHCT595
U4
1
ESP32-C3_SUPERMINI
M1
2
BC338
Q1, Q2
1
~
CN1
1
Conn_01x14_Socket
J1
1
SW_Push
SW1
1
LED
D1
1
WS2812B
D2
7
100n
C1, C2, C3, C4, C5, C6, C7
1
100u
C8
1
100n
C9
1
1k
R1
4
10K
R2, R3, R4, R5
1
470
R6
6
1k
R7, R8, R9, R10, R11, R12

DevRam design files

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

DevRam: common questions

What microcontroller does the DevRam use?

The DevRam is built around the ESP32-C3_SUPERMINI, from the ESP32 family.

How big is the DevRam PCB?

The DevRam measures 100 × 64.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the DevRam?

36 components, from 18 distinct parts. The full bill of materials is listed on this page.

Where can I download the DevRam design files?

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

Can I use the DevRam design in my own project?

Yes, under the terms of its GPL-2.0 license, which Danjovic chose for the repository.

Can I test firmware for the DevRam 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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