2 layers152.4 × 147.3 mm
JACartCommBoard
JACart2/Hardware-Electronics
This repository is copied from a deprecated repository, located at https://github.com/JACart/jacartelectronics.
44 parts
2 layers
This repository is copied from a deprecated repository, located at https://github.com/JACart/jacartelectronics.
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 56
- Nets
- 93
- Pads
- 227
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 5 (file 20171130)
- Created
- 4 Feb 2025
- Updated
- 14 May 2025
Overview
JACart is an open-source printed circuit board by JACart2, from the JACart2/Hardware-Electronics repository on GitHub. It is a 2-layer board with 56 parts on 93 nets.
It is built around the LMC6484IN, LM7805 and BAT85S-TR. Its parts include 18 resistors, 9 diodes, 7 capacitors, 6 switches and 4 connectors.
Main components
3
LMC6484IN
DIP-14-40℃~+85℃ 0.01pA 0.02pA 1.3V/us 1.5MHz 1uV/℃ 20mA 2mA 37nV/√Hz@1kHz 3V~15.5V 4 750uV 82dB Rail-to-Rail Input, Rail-to-Rail Output DIP-14 Operational Amplifier ROHSTexas InstrumentsPrecision Op Amps
LM7805
TO-2630℃~+125℃ 1 1A 20V 2V 42uV 5V 62dB@(120Hz) 8mA Fixed Over Temperature Protection、Short Circuit Protection Positive TO-263 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSYONGYUTAIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BAT85S-TR
DO-35Schottky DiodesVishay Intertechnology
README
README.mdJACart Hardware & Electronics Repo
This repository is copied from a deprecated repository, located at https://github.com/JACart/jacart_electronics.
** First time explorer's guide **
So you're new here. It's recommended you look through the schematics directory first. There you'll find a file named control_flow.png which will help you understand how the different pieces of the cart interact at an abstract level (current as of May-2025). Take a moment to inspect the cart to compare what you see in the diagram.
Visit the PCBFiles directory and read the README before diving into trying to understand the files found there.
Repo Contents
cart_teleop_dac:/ Updated Arduino code that utilizes DACs instead of PWM signals. This version should be the one used as of May-2025
python_teleop:/ Stand-alone python controller for teleop_board. run with python3 wasd_teleop.py locally; Not compatible with Docker setup.
libs:/ Required libraries for the Arudino code
PCBFiles:/ Directory containing PCB schematics for the JACart
schematics:/ Directory containing diagrams that show control flow and wiring in the cart.
RemoteKillSwitch:/ Contains server-side and client-side code for a remote kill switch for the cart.
jac-cart-dac-diagnostic:/ Contains Arduino code for diagnosing DACs on board the main control board.
deprecated:/ Contains outdated Arduino code
Parts
56| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 1N4148 | JACart:DO35-7 | D1, D2, D3, D4, D5, D6 |
| 4 | 470 | JACart:AXIAL-0.3 | R2, R4, R7, R9 |
| 3 | 10k | JACart:AXIAL-0.3 | R11, R12, R14 |
| 3 | 220 | JACart:AXIAL-0.3 | R5, R6, R13 |
| 3 | 2N3904 | JACart:TO92 | Q1, Q2, Q3 |
| 2 | 0.1uF | JACart:CAP-PTH-SMALL-KIT | C1, C6 |
| 2 | 1k | JACart:AXIAL-0.3 | R17, R18 |
| 2 | 330uF | JACart:PANASONIC_A | C4, C5 |
| 2 | 510 | JACart:AXIAL-0.3 | R1, R3 |
| 2 | BAT85S-TR | JACart:DIOAD950W60L350D150 | Z1, Z2 |
| 2 | MCP4725 | JACart:1X06_ROUND_70 | JP1, JP2 |
| 2 | PC817 | JACart:DIL04 | OK1, OK2 |
| 1 | 0.33µF | JACart:0805 | C2 |
| 1 | 1.0uF | JACart:CAP-PTH-SMALL-KIT | C7 |
| 1 | 100 | JACart:AXIAL-0.3 | R16 |
| 1 | 10uF | JACart:CPOL-RADIAL-2.5MM-5MM | C3 |
| 1 | 1M | JACart:AXIAL-0.3 | R8 |
| 1 | 1k | JACart:RJ9W | R15 |
| 1 | 39-30-1060 | JACart:39-30-1060_1 | J1 |
| 1 | ARD-NANO30NP | JACart:ARDNANO30NP | IC2 |
| 1 | Auto | JACart:LED_5MM | LED3 |
| 1 | Brake | JACart:GLX-S-88M | J4 |
| 1 | Brake | JACart:RELAY_JS1-5V-F | K6 |
| 1 | Brake | JACart:LED_5MM | LED1 |
| 1 | Brake(1) | JACart:RELAY_JS1-5V-F | K1 |
| 1 | Brake(2) | JACart:RELAY_JS1-5V-F | K2 |
| 1 | LM7805 | JACart:78XXS | IC1 |
| 1 | LMC6484IN | JACart:DIP794W56P254L1905H533Q14N | IC3 |
| 1 | Steering | JACart:GLX-S-88M | J3 |
| 1 | TBD | JACart:AXIAL-0.3 | R10 |
| 1 | Throttle | JACart:RELAY_JS1-5V-F | K5 |
| 1 | Throttle | JACart:LED_5MM | LED2 |
| 1 | Throttle | JACart:GLX-S-88M | J5 |
| 1 | Throttle(3) | JACart:RELAY_JS1-5V-F | K3 |
| 1 | Throttle(4) | JACart:RELAY_JS1-5V-F | K4 |
Questions
What parts does the JACart use?
56 parts, built around the LMC6484IN, LM7805 and BAT85S-TR. 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 JACart KiCad files?
From the JACart2/Hardware-Electronics repository on GitHub, at the commit this page was made from: the board is PCBFiles/deprecated/JACart - Rev 1/JACart/JACart.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the JACart design in my own project?
Its repository states no licence, so its author keeps all rights: ask JACart2 before reusing the design.
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