HardLabs

Thc

festlv·thc

Thc PCB layout, top view — open source AVR/Arduino board by festlv
Simulate this board

About the Thc PCB

Thc is an open source AVR/Arduino PCB design by festlv, published on GitHub. It is a 2-layer board measuring 123.8 × 99.7 mm, with 72 components from 31 distinct parts.

Its main chip is the ARDUINO_MINI_PRO, from the AVR/Arduino family. Other key parts include the 4N25, LM358, CNY74-4, 7805 and ISOL_PWR. By type, the board carries 29 resistors, 12 ICs, 12 diodes, 12 capacitors, 3 connectors and 1 transistor.

From the project

An automatic torch height controller

Homebrew plasma cutter torch height controller --------------------------------------------------

Schematics, layout and code for a simple yet intelligent replacement for THC301d torch height controller.

The main difference is that this one samples cutting voltage automatically after cut is started, and then tries to keep the plasma torch at the same height.

Beware- this has only been tested for a few hours as of now, but the results seem to be as good as with THC301d (but setpoint is determined automatically).

Main components on the Thc

4N25LM358ARDUINO_MINI_PROCNY74-47805ISOL_PWR74HC04

Thc bill of materials (BOM)

72 components, 31 distinct parts.

QtyPartRefs
1
4N25
IC1
2
4N25
IC2, IC3
1
LM358
U1
1
ARDUINO_MINI_PRO
U2
2
CNY74-4
U3, U7
1
7805
U4
1
ISOL_PWR
U5
1
74HC04
U6
1
ISOL_PWR
U8
1
LM358
U9
1
BC547
Q1
1
BARREL_JACK
CON1
1
DB25
J2
1
DB9
J3
1
P***
1PIN
1
PTC 1.1A 30V
F1
1
IL300
PH1
9
5v1 ZENER
D1, D3, D4, D5, D6, D7, D8, D9 +1
1
1N4007
D2
2
12v1 ZENER
D11, D12
Show 11 more
QtyPartRefs
4
0.1uF
C1, C8, C10, C11
3
1uF
C2, C3, C5
1
100uF
C4
4
10uF
C6, C7, C9, C12
10
10K
R1, R2, R4, R5, R6, R16, R17, R18 +2
3
100R
R3, R20, R25
9
200R
R7, R8, R9, R10, R11, R12, R13, R14 +1
1
3K3
R21
2
47k
R22, R29
2
400R
R24, R26
2
1K
R27, R28

Thc design files

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

Thc: common questions

What microcontroller does the Thc use?

The Thc is built around the ARDUINO_MINI_PRO, from the AVR/Arduino family.

How big is the Thc PCB?

The Thc measures 123.8 × 99.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Thc?

72 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the Thc design files?

From the festlv/thc repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Thc design in my own project?

The repository has no license, so all rights stay with festlv. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Thc 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.

More boards in thc

Similar boards