IRS
About the IRS PCB
IRS is an open source AVR/Arduino PCB design by Lee34667, published on GitHub. It is a 2-layer board measuring 79 × 78 mm, with 23 components from 17 distinct parts.
Its main chip is the ATtiny85V-10S, from the AVR/Arduino family. Other key parts include the LM1875 and DM-OLED096-636. By type, the board carries 9 resistors, 3 ICs, 3 diodes, 3 capacitors, 1 transistor and 1 connector.
From the project
Creating a L9110 module using PCB techniques.
Contains some the PCB projects I have done using KiCad. Most of this boards have been used in the industries and research work.
Main components on the IRS
IRS bill of materials (BOM)
23 components, 17 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATtiny85V-10S | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | LM1875 | SOT-23-5 | U2 |
| 1 | DM-OLED096-636 | MODULE_DM-OLED096-636 | U3 |
| 1 | IRLZ44N | TO-92_Inline_W4.0mm_Horizontal_FlatSideDown | Q1 |
| 1 | USB_B_Micro | USB_Micro-B_Molex_47346-0001 | J1 |
| 1 | Battery_Cell | BatteryHolder_MPD_BH-18650-PC2 | BT1 |
| 1 | Heatsink_Pad | HSINK_577202B04000G | HS1 |
| 1 | SW_Push | SW_PUSH_6mm | SW1 |
| 3 | 1N4148WT | D_SOD-523 | D1, D2, D3 |
| 1 | 1uF/16V | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C1 |
| 2 | 100nF/16V | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C2, C3 |
| 1 | 0.5R-5W | R_Axial_DIN0414_L11.9mm_D4.5mm_P15.24mm_Horizontal | R1 |
| 1 | 0R | R_1210_3225Metric_Pad1.30x2.65mm_HandSolder | R2 |
| 2 | 47R | R_1210_3225Metric_Pad1.30x2.65mm_HandSolder | R3, R5 |
| 1 | 1k | R_1210_3225Metric_Pad1.30x2.65mm_HandSolder | R4 |
| 1 | 100k | R_1210_3225Metric_Pad1.30x2.65mm_HandSolder | R6 |
| 3 | 4.7k | R_1210_3225Metric_Pad1.30x2.65mm_HandSolder | R7, R8, R9 |
IRS design files
The KiCad project lives in the Lee34667/PCB_Kicad_Projects repository on GitHub; these links point at the commit this page was built from.
IRS: common questions
What microcontroller does the IRS use?
The IRS is built around the ATtiny85V-10S, from the AVR/Arduino family.
How big is the IRS PCB?
The IRS measures 79 × 78 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the IRS?
23 components, from 17 distinct parts. The full bill of materials is listed on this page.
Where can I download the IRS design files?
From the Lee34667/PCB_Kicad_Projects repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the IRS design in my own project?
The repository has no license, so all rights stay with Lee34667. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the IRS without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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