RoTec
About the RoTec PCB
RoTec is an open source PCB design by mofosyne, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 25.4 × 52.1 mm, with 21 components from 14 distinct parts.
Other key parts include the XB8089D0, HT-RA62 and nice!nano v2. By type, the board carries 6 resistors, 4 connectors, 3 ICs, 3 transistors, 2 switches and 2 capacitors.
From the project
A low-cost nrf52 device, targeting cases that supports rotary encoder. Forked from jtljac's take on faketec v5
Schematic as pdf Schematic Bill Of Materials
* You may also want to manufacture EC11 Rotary Encoder Horizontal Breakout Board, so you can more easily wire the rotary encoder to the roTec via a JST-SH-4 cable.
Main components on the RoTec
RoTec bill of materials (BOM)
21 components, 14 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XB8089D0 XySemi | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm | U1 |
| 1 | HT-RA62 Heltec | HT-RA62 | U2 |
| 1 | nice!nano v2 Nice! | NICE!NANO and pro-micro V2_2 SMD_With_Alignment_Holes | U3 |
| 3 | AO3400A Alpha & Omega Semiconductor Inc. | SOT-23_Handsoldering | Q1, Q2, Q3 |
| 1 | A1251WR-S-2P Molex PicoBlade 0532610271 CJT(Changjiang Connectors) | Combined_Battery_Connector_Molex_PicoBlade_P1.00_And_JST_PH_2.00mm | J9 |
| 3 | SM04B-SRSS-TB JST-SH-4 JST Sales America Inc. | JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J38, J50, J51 |
| 1 | HYG-5020A Buzzer 5020 HYDZ | Buzzer_5020 | BZ1 |
| 1 | TS-1088R-02026 Reset XUNPU | SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | TS-1088R-02026 SW_Push XUNPU | SW_Push_SPST_NO_Alps_SKRK | SW2 |
| 2 | 100NF 100nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 3 | 10K 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3 |
| 1 | 680K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 1.0M | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
RoTec design files
The KiCad project lives in the mofosyne/roTec_pcb repository on GitHub; these links point at the commit this page was built from.
RoTec: common questions
How big is the RoTec PCB?
The RoTec measures 25.4 × 52.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the RoTec?
21 components, from 14 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 RoTec design files?
From the mofosyne/roTec_pcb 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 RoTec design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which mofosyne chose for the repository.