HardLabs

SMRRC Switch

DavidMFlynn·SerialMRRC·Switch Machine PCB/SMRRC_Switch.kicad_pcb

SMRRC Switch PCB layout, top view — open source PIC board by DavidMFlynn

About the SMRRC Switch PCB

SMRRC Switch is an open source PIC PCB design by DavidMFlynn, published on GitHub under the MIT license. It is a 2-layer board measuring 95.4 × 54.4 mm, with 53 components from 29 distinct parts.

Its main chip is the PIC16F15345-I/SO, from the PIC family. Other key parts include the L78L05_SOT89, L7806 and THVD1500. By type, the board carries 18 resistors, 9 diodes, 9 capacitors, 5 transistors, 5 connectors and 4 ICs.

It belongs with the robotics & motion designs in this gallery.

From the project

Serial Model Railroad Control

This is a set of PCBs and software to control a model railroad with RS485 data buss.

Anamation Controller, 8 servos Block Detector, detects voltage across diode/resistor Optical Detector, broken beam or reflected beam

When a command packet is received from RX1 (RS485): Source=any, Destination=Me: Parse and Process the command. Send any requested data back to the sender on TX1 (RS485). Source=any, Destination=Master: Retransmit on TX2 (USB) Source=any, Destination= other than Master or Me do nothing.

Main components on the SMRRC Switch

L78L05_SOT89L7806PIC16F15345-I/SOTHVD1500

SMRRC Switch bill of materials (BOM)

53 components, 29 distinct parts.

QtyPartRefs
1
L78L05_SOT89
U1
1
L7806
U2
1
PIC16F15345-I/SO
U3
1
THVD1500
U4
2
2N3906
Q1, Q4
2
2N3904
Q2, Q3
1
2N7000
Q5
1
Conn_01x05
J1
1
Conn_01x03
J2
1
Conn_01x03
J3
1
Conn_01x08_Socket
J4
1
Molex 3x4 10181120
J5
1
J114AF
K1
2
SW_Push
SW1, SW2
4
SMA
D1, D2, D6, D7
3
LED_Filled
D3, D4, D5
2
1N4148W
D8, D9
1
10uf
C1
1
33uF
C2
4
0.1uf
C3, C5, C7, C8
Show 9 more
QtyPartRefs
2
.1uF
C4, C6
1
220uF
C9
3
1K0
R1, R3, R5
2
47K
R2, R4
1
220
R6
2
4K7
R7, R15
7
10K
R8, R9, R10, R11, R14, R16, R18
2
2K2
R12, R13
1
27K
R17

SMRRC Switch design files

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

SMRRC Switch: common questions

What microcontroller does the SMRRC Switch use?

The SMRRC Switch is built around the PIC16F15345-I/SO, from the PIC family.

How big is the SMRRC Switch PCB?

The SMRRC Switch measures 95.4 × 54.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SMRRC Switch?

53 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the SMRRC Switch design files?

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

Can I use the SMRRC Switch design in my own project?

Yes, under the terms of its MIT license, which DavidMFlynn chose for the repository.

Can I test firmware for the SMRRC Switch without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug PIC firmware against it before you order a PCB.

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