HardLabs

Input32DC

DavidMFlynn·SerialMRRC·Input 32 Daughter PCB/Input32DC.kicad_pcb

Input32DC PCB layout, top view — open source board by DavidMFlynn

About the Input32DC PCB

Input32DC is an open source PCB design by DavidMFlynn, published on GitHub under the MIT license. It is a 2-layer board measuring 66 × 117 mm, with 218 components from 15 distinct parts.

Other key parts include the 74HC138, 74HC251 and L78L05_SOT89. By type, the board carries 100 resistors, 40 capacitors, 37 diodes, 32 transistors, 6 ICs and 3 connectors.

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 Input32DC

74HC13874HC251L78L05_SOT89

Input32DC bill of materials (BOM)

218 components, 15 distinct parts.

QtyPartRefs
1
74HC138
U1
4
74HC251
U2, U3, U4, U5
1
L78L05_SOT89
U6
32
2N3906
Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9 +24
1
Conn_02x06_Odd_Even
J1
2
Conn_01x16
J2, J3
1
SMA
D1
32
1N4148W
D2, D3, D4, D5, D6, D7, D8, D9 +24
4
1206 LED
D34, D35, D36, D37
1
10uF
C1
39
0.1uF
C2, C3, C4, C5, C6, C7, C8, C9 +31
32
2K2
R1, R6, R9, R12, R15, R18, R21, R24 +24
32
10K
R2, R5, R8, R11, R14, R17, R20, R23 +24
32
47K
R3, R4, R7, R10, R13, R16, R19, R22 +24
4
1K0
R97, R98, R99, R100

Input32DC design files

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

Input32DC: common questions

How big is the Input32DC PCB?

The Input32DC measures 66 × 117 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Input32DC?

218 components, from 15 distinct parts. The full bill of materials is listed on this page.

Where can I download the Input32DC 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 Input32DC design in my own project?

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

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