OpenIEMA
About the OpenIEMA PCB
OpenIEMA is an open source PCB design by aaravjhamb, published on GitHub. It is a 2-layer board measuring 40 × 69.8 mm, with 53 components from 29 distinct parts.
Other key parts include the MCP73831-2-MC, TPS61023DRLR, OPA1678 and TPA6132A2RTE. By type, the board carries 18 capacitors, 16 resistors, 6 diodes, 5 connectors, 4 ICs and 2 inductors.
It belongs with the audio and power & battery designs in this gallery.
From the project
A high quality open source In Ear Monitor Amplifier!! (IEMA for short)
OpenIEMA is an Open Source, In Ear Monitor Amplifier built as an alternative to the Behringer P2 with dual headphone outputs driven from a mono balanced XLR input, with onboard LiPo power and USB-C charging!!
40 × 70 mm, 2-layer, designed in KiCad 10.
- KiCad 10 for schematic capture and layout - pcb2blender for the Blender renders - TI TPA6132A2 + OPA1678, Microchip MCP73831, TI TPS61023
Main components on the OpenIEMA
OpenIEMA bill of materials (BOM)
53 components, 29 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCP73831-2-MC | DFN-8-1EP_3x2mm_P0.5mm_EP1.7x1.4mm | U1 |
| 1 | TPS61023DRLR TI(德州仪器) | SOT-563_L1.6-W1.2-P0.50-LS1.6-BR | U2 |
| 1 | OPA1678 | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | TPA6132A2RTE | WQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm_ThermalVias | U4 |
| 1 | Battery | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J1 |
| 1 | XLR3 | Jack_XLR_Neutrik_NC3FD-H_Horizontal | J2 |
| 1 | USB_C_Receptacle_PowerOnly_6P | USB_C_Receptacle_HRO_TYPE-C-31-M-17 | J3 |
| 2 | C12569 AudioJack3 | Jack_3.5mm_PJ320A_Horizontal | J4, J5 |
| 1 | 10k pot | Potentiometer_Bourns_PTV09A_Single_Vertical | RV1 |
| 1 | SW_SPDT | SW_SPDT_PCM12 | SW2 |
| 4 | LED | LED_0805_2012Metric | D1, D4, D5, D6 |
| 2 | BAV99 | SOT-23 | D2, D3 |
| 1 | FerriteBead | R_0805_2012Metric | FB1 |
| 1 | 1uH | L_Taiyo-Yuden_NR-40xx | L1 |
| 2 | 4.7u | C_0603_1608Metric | C1, C2 |
| 1 | 10u, ceramic | C_0805_2012Metric | C3 |
| 2 | 22u | C_0805_2012Metric | C4, C5 |
| 4 | 10u | C_0805_2012Metric | C6, C7, C8, C14 |
| 4 | 100n | C_0603_1608Metric | C9, C10, C15, C16 |
| 2 | 47u - polarized | CP_Elec_6.3x7.7 | C11, C12 |
Show 9 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 100nf | C_0603_1608Metric | C13 |
| 2 | 1u | C_0603_1608Metric | C17, C18 |
| 2 | 5.1k | R_0603_1608Metric | R1, R2 |
| 1 | 2k | R_0603_1608Metric | R3 |
| 2 | 1k | R_0603_1608Metric | R4, R15 |
| 1 | 732k | R_0603_1608Metric | R5 |
| 3 | 100k | R_0603_1608Metric | R6, R11, R14 |
| 6 | 10k | R_0603_1608Metric | R7, R8, R9, R10, R12, R13 |
| 1 | 4.7k | R_0603_1608Metric | R16 |
OpenIEMA design files
The KiCad project lives in the aaravjhamb/openIEMA repository on GitHub; these links point at the commit this page was built from.
- LayoutPCB/OpenIEMA.kicad_pcb
- SchematicPCB/OpenIEMA.kicad_sch
- BOMbom.csv
OpenIEMA: common questions
How big is the OpenIEMA PCB?
The OpenIEMA measures 40 × 69.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the OpenIEMA?
53 components, from 29 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 OpenIEMA design files?
From the aaravjhamb/openIEMA 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 OpenIEMA design in my own project?
The repository has no license, so all rights stay with aaravjhamb. Use it as a reference, and ask the author before reusing the design.
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