2 layers
2 layers123.8 × 99.7 mm
Thc
festlv/thc7An automatic torch height controller
- Size
- 123.8 × 99.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 75
- Nets
- 55
- Pads
- 279
- Tracks, vias
- 560, 20
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 3
- Created
- 2 Mar 2014
- Updated
- 2 Mar 2014
Overview
Thc is an open-source printed circuit board by festlv, from the festlv/thc repository on GitHub. It is a 2-layer board of 123.8 × 99.7 mm with 75 parts on 55 nets, routed with 560 tracks and 20 vias.
It is built around the LM358, CNY74-4H and 74HC04D, with the BC547 and IL300 among its other parts. Its parts include 29 resistors, 12 capacitors, 12 ICs, 12 diodes and 3 connectors.
Main components
5
LM358
SOP-8-18V~18V 0℃~+70℃ 1.2MHz 10nA 2 24mA 3V~36V 500uA 50nA 5mV 80dB Built-in compensation SOP-8 Operational Amplifier ROHSMSKSEMIOperational Amplifier
CNY74-4H
DIP-16-55℃~+100℃ 1.3V 300mV@2mA,16mA 3V 3us@2mA,100Ω 4 4.7us@2mA,100Ω 5.3kV 50% 500mW 600% 60mA 70V DC Phototransistor DIP-16 Transistor, Photovoltaic Output Optoisolators ROHSVishay IntertechnologyTransistor, Photovoltaic Output Optoisolators
74HC04D
SOP-14-40℃~+125℃ 1 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV、400mV 14ns@6V,50pF 2V~6V 2uA 5.2mA 5.2mA 500mV~1.8V 6 74HC SOIC-14 Inverters ROHSNexperiaInverters
BC547
TO-92Bipolar (BJT)Jiangsu Changjing Electronics Technology (CJ)
IL300
DIP-8-55℃~+100℃ 1 1.25V 1.75us 1us 210mW 4.42kV 5V 60mA DC Photodiode DIP-8 Transistor, Photovoltaic Output Optoisolators ROHSVishay IntertechnologyOptocouplers - Phototransistor Output
README
README.mdHomebrew 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).
License: GNU General Public License (GPL) version 3.
Author: Reinis Veips, http://wot.lv/
Parts
75| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 10K | R3-LARGE_PADS | R1, R2, R4, R5, R6, R16, R17, R18, R19, R23 |
| 9 | 200R | R3-LARGE_PADS | R7, R8, R9, R10, R11, R12, R13, R14, R15 |
| 9 | 5v1 ZENER | D3 | D1, D3, D4, D5, D6, D7, D8, D9, D10 |
| 4 | 0.1uF | C1 | C1, C8, C10, C11 |
| 4 | 10uF | C1V7 | C6, C7, C9, C12 |
| 4 | P*** | 1pin | 1PIN, 1PIN, 1PIN, 1PIN |
| 3 | 100R | R3-LARGE_PADS | R3, R20, R25 |
| 3 | 1uF | C1 | C2, C3, C5 |
| 2 | 12v1 ZENER | D3 | D11, D12 |
| 2 | 1K | R3-LARGE_PADS | R27, R28 |
| 2 | 400R | R3-LARGE_PADS | R24, R26 |
| 2 | 47k | R3-LARGE_PADS | R22, R29 |
| 2 | 4N25 | DIP-6__300_ELL | IC2, IC3 |
| 2 | CNY74-4 | DIP-16__300 | U3, U7 |
| 1 | 100uF | C1V7 | C4 |
| 1 | 1N4007 | D5 | D2 |
| 1 | 3K3 | R3-LARGE_PADS | R21 |
| 1 | 4N25 | DIP-6__300 | IC1 |
| 1 | 74HC04 | DIP-14__300 | U6 |
| 1 | 7805 | LM78XXV | U4 |
| 1 | ARDUINO_MINI_PRO | ARDUINO_MINI | U2 |
| 1 | BARREL_JACK | BARREL_JACK | CON1 |
| 1 | BC547 | TO92-EBC | Q1 |
| 1 | DB25 | DB25FC | J2 |
| 1 | DB9 | DB9FC | J3 |
| 1 | IL300 | DIP-8__300_ELL | PH1 |
| 1 | ISOL_PWR | MCE_DIP | U8 |
| 1 | ISOL_PWR | SIL-4 | U5 |
| 1 | LM358 | DIP-8__300 | U1 |
| 1 | LM358 | DIP-8__300_ELL | U9 |
| 1 | PTC 1.1A 30V | CP4 | F1 |
Questions
How big is the Thc PCB?
It measures 123.8 × 99.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Thc use?
75 parts, built around the LM358, CNY74-4H, 74HC04D and BC547. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Thc KiCad files?
From the festlv/thc repository on GitHub, at the commit this page was made from: the board is thc.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Thc design in my own project?
Its repository states no licence, so its author keeps all rights: ask festlv before reusing the design.
More from festlv/thc
1Similar boards
- 2 layers122.2 × 99.6 mm
- 2 layers202.2 × 131 mm
New system
MadsRudolph/62768-energy-system
Team project for 62768 Electrical Energy Systems (DTU, June 2026, 3-week course). We design and build a complete electrical energy system per the course requirement spec (Kravspecifikation), from idea to a working…
131 parts - 2 layers90 × 46 mm
- 2 layers181.1 × 139.9 mm
Campervan management
akladnig/CamperVan
- CamperVan Design and Arduino Circuit Design - Campervan Design Overview - Dashboard App - Electrical System - Sensors - Circuit Design - Battery and voltage monitoring - Voltage Divider Design - Low Pass Filter - TODO
116 parts - 2 layers
- 2 layers161.2 × 117.9 mm
Control de panel
martincrespo77/Paneles-solares-pcb-esp32
Seguidor solar de 2 ejes con ESP32: firmware PlatformIO y PCB en KiCad
35 parts - 2 layers119.4 × 33 mm
KiCadPcb
Warre04/Smart_DeLonghi_ECAM13.123.B
This repository documents the process of upgrading my De'Longhi machine with smart features. The electronic system has been reverse-engineered to integrate an ESP8266, which connects to Home Assistant using ESPHome.
13 partsMIT - 4 layers140 × 136 mm
Vinyl adc rev d
MadsRudolph/vinyl-adc
Discrete 3rd-order delta-sigma stereo audio ADC, built from op-amps and logic gates: a four-layer Raspberry Pi HAT made by PCBWay, with KiCad files, SPICE simulations and measurements
184 parts1