Encoder interpolator
About the Encoder interpolator PCB
Encoder interpolator is an open source PCB design by matthewSorensen, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 78 × 46 mm, with 63 components from 26 distinct parts.
Other key parts include the UA9638C, ICTW8, 24AA02-OT and MCP1754S-3302xMB. By type, the board carries 24 resistors, 22 capacitors, 5 ICs, 4 diodes, 3 jumpers and 2 connectors.
From the project
sin/cos linear encoder interpolator hardware
This project contains source files for hardware designed to interface with industry-standard 1vpp analog-output sin/cos encoders, and convert their output into a high-resolution interpolated digital quadrature signal. It uses iC-Haus' iC-TW8 16-bit sin/cos interpolator IC in order to do this, and has an interface compatible with Renishaw's REE analog interpolators. However, unlike the REE series, it isn't limited to a fixed factory-set resolution and has a SPI interface.
Main components on the Encoder interpolator
Encoder interpolator bill of materials (BOM)
63 components, 26 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | UA9638C | SOIC-8_3.9x4.9mm_P1.27mm | U1, U2 |
| 1 | ICTW8 | QFN-48-1EP_7x7mm_P0.5mm_EP5.45x5.45mm | U3 |
| 1 | 24AA02-OT | SOT-23-5 | U5 |
| 1 | MCP1754S-3302xMB | SOT-89-3 | U6 |
| 1 | DSC1001BE5-024.0000 | Oscillator5x3.2mm | X1 |
| 2 | Conn_01x12 | PinHeader_1x12_P2.54mm_Horizontal | J3, J4 |
| 1 | Jumper_2_Bridged | SolderJumper-2_P1.3mm_Bridged2Bar_Pad1.0x1.5mm | JP1 |
| 2 | SolderJumper_3_Bridged12 | SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP2, JP3 |
| 1 | SW_Push | SW_Push_1P1T_NO_CK_KMR2 | SW1 |
| 4 | LED | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1, D2, D3, D5 |
| 1 | FerriteBead_Small | R_0805_2012Metric | FB1 |
| 3 | 47pF | C_0603_1608Metric | C1, C2, C3 |
| 6 | 470pF | C_0603_1608Metric | C4, C5, C6, C7, C8, C9 |
| 2 | 10uF | C_0805_2012Metric | C10, C17 |
| 9 | 0.1uF | C_0603_1608Metric | C11, C12, C13, C14, C15, C16, C18, C20 +1 |
| 1 | 22uF | C_1206_3216Metric | C19 |
| 1 | 1uF | C_0603_1608Metric | C21 |
| 3 | 120R | R_0603_1608Metric | R1, R2, R3 |
| 7 | R1K | R_0603_1608Metric | R4, R5, R6, R7, R8, R9, R19 |
| 6 | R | R_0805_2012Metric | R10, R11, R12, R13, R14, R15 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10K | R_0805_2012Metric | R16 |
| 1 | 4.99K | R_0805_2012Metric | R17 |
| 1 | R20K | R_0603_1608Metric | R20 |
| 1 | 20K | R_0603_1608Metric | R21 |
| 3 | R10K | R_Array_Convex_4x0603 | RN1, RN2, RN3 |
| 1 | R20K | R_Array_Convex_4x0603 | RN4 |
Encoder interpolator design files
The KiCad project lives in the matthewSorensen/encoder-interpolator repository on GitHub; these links point at the commit this page was built from.
Encoder interpolator: common questions
How big is the Encoder interpolator PCB?
The Encoder interpolator measures 78 × 46 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Encoder interpolator?
63 components, from 26 distinct parts. The full bill of materials is listed on this page.
Where can I download the Encoder interpolator design files?
From the matthewSorensen/encoder-interpolator repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Encoder interpolator design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which matthewSorensen chose for the repository.