OT Thing Tester
About the OT Thing Tester PCB
OT Thing Tester is an open source PCB design by Phunkafizer, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 84 × 93.1 mm, with 42 components from 22 distinct parts.
Other key parts include the LM358 and DS18B20. By type, the board carries 18 resistors, 6 transistors, 5 diodes, 4 connectors, 4 capacitors and 3 ICs.
It belongs with the iot & wireless and sensors designs in this gallery.
From the project
A compact universal OpenTherm WiFi Interface
A compact WiFi OpenTherm (master & slave) interface
https://www.seegel-systeme.de/2025/01/05/ot-thing-das-universelle-wifi-opentherm-interface/
OTthing is a versatile OpenTherm gateway that connects your heating system to the Internet via WiFi. It acts as an OpenTherm master (controlling your boiler) and/or slave (integrating with room thermostats), providing real-time monitoring and control through a modern web interface and Home Assistant integration.
Main components on the OT Thing Tester
OT Thing Tester bill of materials (BOM)
42 components, 22 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM358 | SO-8_3.9x4.9mm_P1.27mm | U1 |
| 2 | DS18B20 | TO-92_Inline | U2, U3 |
| 2 | BSP62 | SOT-223 | Q1, Q2 |
| 2 | BC847 | SOT-23 | Q3, Q5 |
| 2 | BC857 | SOT-23 | Q4, Q6 |
| 1 | Conn_01x05 | PinHeader_1x05_P2.54mm_Vertical | J1 |
| 1 | Conn_01x08 | PinHeader_1x08_P2.54mm_Vertical | J2 |
| 1 | Barrel_Jack_Switch | BarrelJack_GCT_DCJ200-10-A_Horizontal | J3 |
| 1 | USB_C_Receptacle_USB2.0 | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J4 |
| 2 | 1k | Potentiometer_Bourns_3266Y_Vertical | RV1, RV2 |
| 4 | LED | LED_0805_2012Metric | D1, D3, D4, D5 |
| 1 | 3V3 | D_MiniMELF | D2 |
| 2 | 100n | C_0805_2012Metric | C1, C2 |
| 2 | 47p | C_0805_2012Metric | C3, C4 |
| 1 | 22 | R_0805_2012Metric | R1 |
| 1 | 8k2 | R_0805_2012Metric | R2 |
| 2 | 2k2 | R_0805_2012Metric | R3, R6 |
| 1 | 100 | R_0805_2012Metric | R4 |
| 1 | 330 | R_0805_2012Metric | R5 |
| 6 | 4k7 | R_0805_2012Metric | R7, R9, R11, R13, R15, R16 |
Show 2 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 120 | R_0805_2012Metric | R8, R10, R12, R14 |
| 2 | 5k1 | R_0805_2012Metric | R17, R18 |
OT Thing Tester design files
The KiCad project lives in the Phunkafizer/OT-Thing repository on GitHub; these links point at the commit this page was built from.
OT Thing Tester: common questions
How big is the OT Thing Tester PCB?
The OT Thing Tester measures 84 × 93.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the OT Thing Tester?
42 components, from 22 distinct parts. The full bill of materials is listed on this page.
Where can I download the OT Thing Tester design files?
From the Phunkafizer/OT-Thing repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the OT Thing Tester design in my own project?
Yes, under the terms of its GPL-3.0 license, which Phunkafizer chose for the repository.
More boards in OT-Thing
Similar boards
Sensor smd
scottbez1
40 × 20 mm5 parts2LApache-2.04.2k
Sensors
StuckAtPrototype
15.2 × 9 mm14 parts4LApache-2.03.8k
EinkPDA screen
TalismanDesign
95 × 54 mm27 parts2LApache-2.02.0k
Microphone
Mentra-Community
5.5 × 6.1 mm6 parts2LMIT1.2k
TemperaturePCB PANEL
stuartpittaway
116 × 75.5 mm178 parts2LCC-BY-NC-4.01.1k
RPi RM0 WiFi/Bluetooth Module
schlae
11.1 × 14 mm76 parts6LNo license1.0k