HardLabs

H bridge

Miceuz·h-bridge

H bridge PCB layout, top view — open source AVR/Arduino board by Miceuz

About the H bridge PCB

H bridge is an open source AVR/Arduino PCB design by Miceuz, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 246.4 × 163.8 mm, with 91 components from 35 distinct parts.

Its main chip is the arduino_pro_mini, from the AVR/Arduino family. Other key parts include the SP3485CN, 74LS04, 74LS08, IR21834 and LM358N. By type, the board carries 29 resistors, 27 capacitors, 12 diodes, 8 ICs, 8 connectors and 5 transistors.

From the project

High voltage H-bridge driver

Main components on the H bridge

SP3485CN74LS0474LS08arduino_pro_miniIR21834LM358NLM358

H bridge bill of materials (BOM)

91 components, 35 distinct parts.

QtyPartRefs
1
SP3485CN
IC1
1
74LS04
U1
1
74LS08
U2
1
arduino_pro_mini
U3
2
IR21834
U4, U5
1
LM358N
U6
1
LM358
U7
4
MOSFET_N
Q1, Q2, Q3, Q4
1
NPN
Q5
1
ENCODER
P1
1
ISP
P2
1
MOTOR
P3
1
POWER
P4
1
FAN
P5
2
TERM1
P6, P7
1
CONN_5
P8
1
JUMPER
JP1
1
10k
RV1
2
5.2V
D1, D2
6
DIODESCH
D5, D6, D7, D8, D9, D10
Show 15 more
QtyPartRefs
4
DIODE
D11, D12, D13, D14
14
1u
C1, C8, C9, C13, C15, C19, C20, C21 +6
1
10u
C2
4
100uF
C3, C5, C6, C14
2
1uF
C4, C11
2
0.47uF
C7, C12
1
2200uF
C10
1
10n
C16
1
100n
C17
1
100u
C18
7
10k
R1, R2, R10, R11, R14, R15, R23
16
R
R3, R4, R5, R8, R9, R12, R16, R17 +8
3
1k
R6, R7, R24
1
0.02
R13
2
10
R27, R28

H bridge design files

The KiCad project lives in the Miceuz/h-bridge repository on GitHub; these links point at the commit this page was built from.

H bridge: common questions

What microcontroller does the H bridge use?

The H bridge is built around the arduino_pro_mini, from the AVR/Arduino family.

How big is the H bridge PCB?

The H bridge measures 246.4 × 163.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the H bridge?

91 components, from 35 distinct parts. The full bill of materials is listed on this page.

Where can I download the H bridge design files?

From the Miceuz/h-bridge repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the H bridge design in my own project?

Yes, under the terms of its Apache-2.0 license, which Miceuz chose for the repository.

Can I test firmware for the H bridge without the hardware?

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

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