HardLabs

PocketTRS

apuder·PocketTRS·kicad/v2.3c/PocketTRS.kicad_pcb

PocketTRS PCB layout, top view — open source ESP32 board by apuder
Simulate this board

About the PocketTRS PCB

PocketTRS is an open source ESP32 PCB design by apuder, published on GitHub. It is a 2-layer board measuring 87.6 × 83.6 mm, with 48 components from 27 distinct parts.

Its main chip is the ESP32-WROVER-B, from the ESP32 family. Other key parts include the MCP23S17_SP, MCP23S08T-E, AMS1117-3.3 and MCP43x1. By type, the board carries 18 resistors, 12 capacitors, 8 connectors, 5 ICs, 3 transistors and 2 switches.

It belongs with the audio, iot & wireless and usb & debug tools designs in this gallery.

From the project

PocketTRS uses a modern microcontroller to emulate a TRS-80 personal computer. It can be connected to any compatible VGA monitor and PS/2 keyboard. PocketTRS has TRS-IO embedded for full FreHD support. PocketTRS offers the following features:

PocketTRS uses a modern microcontroller to emulate a TRS-80 personal computer. It can be connected to any compatible VGA monitor and PS/2 keyboard. PocketTRS has TRS-IO embedded for full FreHD support. PocketTRS offers the following features:

1. Emulates a Model III and Model 4 2. Grafyx support 3. Cassette input (500 baud only) 4. Game sound 5. Emulates the 50-pin expansion interface 6. Integrated TRS-IO

PocketTRS, from the project README
From the project README

Main components on the PocketTRS

ESP32-WROVER-BMCP23S17_SPMCP23S08T-EAMS1117-3.3MCP43x1

PocketTRS bill of materials (BOM)

48 components, 27 distinct parts.

QtyPartRefs
1
ESP32-WROVER-B
U1
1
MCP23S17_SP
U2
1
MCP23S08T-E
U3
1
AMS1117-3.3
U4
1
MCP43x1
U5
1
BSS138
Q1
2
MMBT3904
Q2, Q3
1
TRS-80 Pin Header
J1
1
AudioJack3
J2
1
Mini-DIN-6
J3
1
DB15_Female_HighDensity
J4
1
Programmer
J5
1
USB_B_Micro
J6
1
TRS-80 Edge Connector
J7
1
SD_Card
J8
1
PTRS_RESET
SW1
1
ESP_RESET
SW2
3
10U
C1, C2, C11
6
100N
C3, C6, C7, C8, C9, C10
2
100U
C4, C5
Show 7 more
QtyPartRefs
1
1U
C12
2
2K
R4, R5
5
4K7
R6, R7, R12, R13, R16
1
270R
R8
1
150R
R9
7
10K
R10, R11, R17, R18, R19, R20, R21
2
12K
R14, R15

PocketTRS design files

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

PocketTRS: common questions

What microcontroller does the PocketTRS use?

The PocketTRS is built around the ESP32-WROVER-B, from the ESP32 family.

How big is the PocketTRS PCB?

The PocketTRS measures 87.6 × 83.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PocketTRS?

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

Where can I download the PocketTRS design files?

From the apuder/PocketTRS repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the PocketTRS design in my own project?

The repository has no license, so all rights stay with apuder. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the PocketTRS 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.

Similar boards