ESP32-T7S3-MultiFunctionUniversalTurnout
About the ESP32-T7S3-MultiFunctionUniversalTurnout PCB
ESP32-T7S3-MultiFunctionUniversalTurnout is an open source ESP32 PCB design by RobertPHeller, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 99.1 × 125.7 mm, with 102 components from 45 distinct parts.
Its main chip is the TTGO-T7_S3-V1.1, from the ESP32 family. Other key parts include the AP63205, TC4426, 74HCT14, LM339 and PCA9685. By type, the board carries 30 resistors, 17 diodes, 17 capacitors, 11 ICs, 9 jumpers and 5 connectors.
From the project
ESP32 based LCC Boards
This is a LCC node circuit board that is based around an Lily Go TTGO-T7S3 (Mini32) board to manage and operate a collection of model railroad sensors and actuators.
- Four occupancy detectors. CT Coil type sensors, so they won't work with DC systems without an AC bias. - Four turnout drivers with point sense. These are on a daughter board. There are four daughter board types: one for stall motors (Tortoise and the like), one for single-coil motors (Kato), one for twin-coil motors (Atlas, Peco), and one for servos. - Four Schmitt Trigger inputs, meant for push buttons. - Four Buffered…
Main components on the ESP32-T7S3-MultiFunctionUniversalTurnout
ESP32-T7S3-MultiFunctionUniversalTurnout bill of materials (BOM)
102 components, 45 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TTGO-T7_S3-V1.1 | ESP32_mini | U201 |
| 1 | AP63205 | TSOT-23-6_MK06A | U301 |
| 2 | TC4426 | SOIC-8_3.9x4.9mm_Pitch1.27mm | U401, U402 |
| 1 | 74HCT14 | SOIC-14_3.9x8.7mm_Pitch1.27mm | U403 |
| 2 | LM339 | SOIC-14_3.9x8.7mm_Pitch1.27mm | U601, U602 |
| 1 | PCA9685 | TSSOP-28_4.4x9.7mm_Pitch0.65mm | U701 |
| 2 | TBD62X83A | SOIC-18W_7.5x11.6mm_Pitch1.27mm | U702, U703 |
| 1 | TCAN332DR | SOIC-8_3.9x4.9mm_Pitch1.27mm | U801 |
| 1 | Turnout Daughterboard | Socket_Strip_Straight_1x10_Pitch2.54mm | J101 |
| 2 | RJ45 | RJ45_8N-S | J801, J802 |
| 1 | A7 A6 A5 A4 A3 A2 A1 A0 C | TerminalBlock_Pheonix_MPT-2.54mm_9pol | P701 |
| 1 | B7 B6 B5 B4 B3 B2 B1 B0 C | TerminalBlock_Pheonix_MPT-2.54mm_9pol | P702 |
| 8 | 0 | R_1206 | JP701, JP702, JP703, JP704, JP705, JP706, JP707, JP708 |
| 1 | Termination | Pin_Header_Straight_2x02_Pitch2.54mm | JP801 |
| 2 | 1.5K Ohms | 4816P | RP701, RP702 |
| 4 | 25K Ohms | Potentiometer_Trimmer_Bourns_3214J | RV601, RV602, RV603, RV604 |
| 1 | + 12V - | TerminalBlock_Pheonix_MPT-2.54mm_2pol | T701 |
| 1 | - 15 in + | TerminalBlock_Pheonix_MPT-2.54mm_2pol | T801 |
| 1 | - 15 out + | TerminalBlock_Pheonix_MPT-2.54mm_2pol | T802 |
| 1 | +V 1 2 3 4 GND | TerminalBlock_Pheonix_MPT-2.54mm_6pol | Term401 |
Show 25 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1 2 3 4 GND | TerminalBlock_Pheonix_MPT-2.54mm_5pol | Term402 |
| 1 | 4B 4A 3B 3A 2B 2A 1B 1A | TerminalBlock_Pheonix_MPT-2.54mm_8pol | Term601 |
| 1 | ACT1 | LED_0402 | D2 |
| 1 | ACT2 | LED_0402 | D4 |
| 8 | 1N4148 | D_SOD-323 | D601, D602, D603, D604, D605, D606, D607, D608 |
| 4 | LED | LED_0603 | D609, D610, D611, D612 |
| 3 | DFLS240-7 | D_PowerDI-123 | D701, D801, D802 |
| 1 | 4.7uH | L_7.3x7.3_H4.5 | L301 |
| 1 | 10uf | CP_Elec_5x5.3 | C301 |
| 1 | 100nf | C_0603 | C302 |
| 2 | 22uf | C_0603 | C303, C304 |
| 3 | .1 uf | C_0603 | C401, C701, C801 |
| 4 | 10 nf | C_0603 | C402, C403, C404, C405 |
| 4 | 2.2uf 35V | CP_Elec_4x5.7 | C601, C602, C603, C604 |
| 1 | 15 uf 15V | CP_Elec_4x5.7 | C802 |
| 1 | 47 nf | C_0603 | C803 |
| 2 | 270 | R_0402 | R2, R3 |
| 2 | 2.4K | R_0402 | R203, R206 |
| 4 | R | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R401, R403, R405, R407 |
| 4 | 1.5K Ohms | R_0603 | R402, R404, R406, R408 |
| 4 | 10K Ohms | R_0603 | R409, R410, R411, R412 |
| 4 | 22K Ohms | R_0603 | R601, R602, R603, R604 |
| 4 | 1M Ohms | R_0603 | R605, R606, R607, R608 |
| 4 | 2.7K Ohms | R_0603 | R609, R610, R611, R612 |
| 2 | 60 Ohms | R_1206 | R801, R802 |
ESP32-T7S3-MultiFunctionUniversalTurnout design files
The KiCad project lives in the RobertPHeller/ESP32-LCC repository on GitHub; these links point at the commit this page was built from.
ESP32-T7S3-MultiFunctionUniversalTurnout: common questions
What microcontroller does the ESP32-T7S3-MultiFunctionUniversalTurnout use?
The ESP32-T7S3-MultiFunctionUniversalTurnout is built around the TTGO-T7_S3-V1.1, from the ESP32 family.
How big is the ESP32-T7S3-MultiFunctionUniversalTurnout PCB?
The ESP32-T7S3-MultiFunctionUniversalTurnout measures 99.1 × 125.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the ESP32-T7S3-MultiFunctionUniversalTurnout?
102 components, from 45 distinct parts. The full bill of materials is listed on this page.
Where can I download the ESP32-T7S3-MultiFunctionUniversalTurnout design files?
From the RobertPHeller/ESP32-LCC repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the ESP32-T7S3-MultiFunctionUniversalTurnout design in my own project?
Yes, under the terms of its CC-BY-4.0 license, which RobertPHeller chose for the repository.
Can I test firmware for the ESP32-T7S3-MultiFunctionUniversalTurnout 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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