1w-If
About the 1w-If PCB
1w-If is an open source PCB design by waldbaer, published on GitHub under the MIT license. It is a 2-layer board measuring 68 × 85 mm, with 44 components from 17 distinct parts.
Other key parts include the WT32-ETH01, TCA9548APWR and DS2484R. By type, the board carries 20 resistors, 9 capacitors, 7 crystals, 6 ICs and 2 diodes.
It belongs with the iot & wireless and sensors designs in this gallery.
From the project
ESP32-based 1-Wire interface supporting access with physical ethernet and MQTT protocol
An ESP32-based 1-Wire interface supporting access with physical ethernet and MQTT protocol.
Access 1-wire devices via ethernet / MQTT protocol 4 independent 1-Wire channels with hardware bus masters Over-the-air (OTA) updates (web interface and espota protocol) Responsive web interface for configuration NTP for clock synchronization 3D printed housing
DS2401 / DS2411 (Silicon Serial Number) Unique Unique 64-Bit Serial Code
Main components on the 1w-If
1w-If bill of materials (BOM)
44 components, 17 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | WT32-ETH01 | WT32-ETH01_inv_mount | U1 |
| 1 | TCA9548APWR | TSSOP-24_4.4x7.8mm_P0.65mm | U2 |
| 4 | DS2484R | SOT-23-6 | U3, U4, U5, U6 |
| 1 | PowerSupply | TerminalBlock_WAGO_2601-1103_1x03_P3.50mm_Horizontal | X1 |
| 1 | Debug Terminal | TerminalBlock_WAGO_2601-1105_1x05_P3.50mm_Horizontal | X2 |
| 1 | Ext LED Terminal | TerminalBlock_MetzConnect_Type086_RT03404HBLC_1x04_P3.81mm_Horizontal | X3 |
| 1 | 1-Wire Ch1 | TerminalBlock_WAGO_2601-1104_1x04_P3.50mm_Horizontal | X4 |
| 1 | 1-Wire Ch2 | TerminalBlock_WAGO_2601-1104_1x04_P3.50mm_Horizontal | X5 |
| 1 | 1-Wire Ch3 | TerminalBlock_WAGO_2601-1104_1x04_P3.50mm_Horizontal | X6 |
| 1 | 1-Wire Ch4 | TerminalBlock_WAGO_2601-1104_1x04_P3.50mm_Horizontal | X7 |
| 1 | LED Power 5mA | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | LED Status 5mA | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 4 | 10UF 10uF | CP_EIA-3216-18_Kemet-A_HandSolder | C1, C2, C3, C4 |
| 5 | 100NF 100nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C6, C7, C8, C9 |
| 4 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4 |
| 12 | 10K 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6, R7, R8, R9, R10, R12, R13 +4 |
| 4 | 2.2K 2.2k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11, R14, R17, R20 |
1w-If design files
The KiCad project lives in the waldbaer/1w-If repository on GitHub; these links point at the commit this page was built from.
1w-If: common questions
How big is the 1w-If PCB?
The 1w-If measures 68 × 85 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 1w-If?
44 components, from 17 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the 1w-If design files?
From the waldbaer/1w-If repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the 1w-If design in my own project?
Yes, under the terms of its MIT license, which waldbaer chose for the repository.
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