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TI83x

pjschinske·TI83x

TI83x PCB layout, top view — open source ESP32 board by pjschinske
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About the TI83x PCB

TI83x is an open source ESP32 PCB design by pjschinske, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 72.5 × 170 mm, with 103 components from 37 distinct parts.

Its main chip is the ESP32-S3-WROOM-2-N32R8V, from the ESP32 family. Other key parts include the STS234050U160, TCA9535PWR, AP63203WU-7, MCP73811T-420I/OT and XC9142B50CMR-G. By type, the board carries 51 switches, 19 capacitors, 13 resistors, 7 ICs, 4 connectors and 4 inductors.

From the project

New internals for a TI-83 Plus graphing calculator

If Texas Instruments still made a TI-83... well, it would probably look a lot a lot different than this, but this is what I would want it to look like.

I'm completely replacing the internals of a TI-83 Plus graphing calculator and moderizing them.

This project is licenced under CERN-OHL-S v2.

- A full–color 240x320 IPS touchscreen from Newhaven Display - An ESP32 microcontroller - A Lithium ion battery, charged via USB-C

TI83x, from the project README
From the project README

Main components on the TI83x

STS234050U160ESP32-S3-WROOM-2-N32R8VTCA9535PWRAP63203WU-7MCP73811T-420I/OTXC9142B50CMR-GAP9101CK6-BVTRG1

TI83x bill of materials (BOM)

103 components, 37 distinct parts.

QtyPartRefs
1
STS234050U160
U1
1
ESP32-S3-WROOM-2-N32R8V
U2
1
TCA9535PWR
U3
1
AP63203WU-7
U4
1
MCP73811T-420I/OT
U5
1
XC9142B50CMR-G
U6
1
AP9101CK6-BVTRG1
U7
1
SSM3K335R,LF
Q1
2
G6N02L
Q2, Q3
1
USB4520-03-1-A_REVA
J1
1
505110-4091
J2
1
52271-0679
J3
1
S2B-PH-K-S(LF)(SN)
J4
1
0ZCJ0075AF2E
F2
50
TS07-667-37-BK-100-SMT-TR
S1, S2, S3, S4, S5, S6, S7, S8 +42
1
EVQ-Q2B02W
S51
1
LS Q976-NR-1
D3
2
BLM18PG330SN1D
FB1, FB2
1
LQH5BPN4R7NT0L
L1
1
SRR3818A-3R9Y
L2
Show 17 more
QtyPartRefs
1
10nF
C1
6
0.1uF
C2, C4, C14, C15, C17, C28
3
22uF
C3, C7, C29
1
2.2uF
C5
4
10uF
C6, C9, C12, C16
2
47pF
C8, C13
2
1uF
C10, C11
2
5.1K
R1, R5
1
10K
R2
2
2.2k
R3, R10
1
82R
R4
2
27R
R6, R7
1
82K
R8
1
20K
R9
1
330R
R11
1
50m
R12
1
18R 1/4W
R32

TI83x design files

The KiCad project lives in the pjschinske/TI83x repository on GitHub; these links point at the commit this page was built from.

TI83x: common questions

What microcontroller does the TI83x use?

The TI83x is built around the ESP32-S3-WROOM-2-N32R8V, from the ESP32 family.

How big is the TI83x PCB?

The TI83x measures 72.5 × 170 mm, has 4 copper layers and is 0.7912 mm thick.

How many components are on the TI83x?

103 components, from 37 distinct parts. The full bill of materials is listed on this page.

Where can I download the TI83x design files?

From the pjschinske/TI83x repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the TI83x design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which pjschinske chose for the repository.

Can I test firmware for the TI83x 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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