Eps
About the Eps PCB
Eps is an open source PCB design by prasannan-robots, published on GitHub. It is a 2-layer board measuring 90 × 96 mm, with 50 components from 36 distinct parts.
Other key parts include the LT3652IMSE, CMSH3-40MA and LT3479EDE_TRPBF. By type, the board carries 14 resistors, 11 capacitors, 10 diodes, 3 ICs, 2 connectors and 2 battery holders.
Main components on the Eps
Eps bill of materials (BOM)
50 components, 36 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LT3652IMSE | MSOP-12-1EP_3x4mm_P0.65mm_EP1.65x2.85mm | U1 |
| 1 | CMSH3-40MA | SMA | U2 |
| 1 | LT3479EDE_TRPBF Analog Devices | DFN-14_DE_LIT-L | U3 |
| 1 | Conn_01x02_Pin | PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | NTC_PIN | PinHeader_1x02_P2.54mm_Vertical | J3 |
| 2 | 3.7v | BatteryHolder_Keystone_1042_1x18650 | BT1, BT2 |
| 6 | Solar_Cells | PinHeader_1x02_P2.54mm_Vertical | SC1, SC2, SC3, SC4, SC5, SC6 |
| 6 | D_Schottky | D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D5, D6 |
| 1 | MBR340 | D_DO-201AD_P15.24mm_Horizontal | D7 |
| 1 | 1N5817 | D_DO-41_SOD81_P10.16mm_Horizontal | D8 |
| 2 | LED | LED_D5.0mm | D9, D10 |
| 1 | 4.7uH | L_Radial_D8.7mm_P5.00mm_Fastron_07HCP | L1 |
| 1 | 10uH | L_2512_6332Metric_Pad1.52x3.35mm_HandSolder | L2 |
| 1 | 2.2uF | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1 |
| 1 | 0.1uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2 |
| 1 | 10nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 100pF | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C4 |
| 1 | 470pF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5 |
| 1 | 0.1uF 10V | C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C6 |
| 1 | 10uF 10V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
Show 16 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1uF 50V | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C8 |
| 1 | 100uF 10V | C_Radial_D5.0mm_H11.0mm_P2.00mm | C9 |
| 1 | 10uF 16V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 1 | 1uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C11 |
| 1 | 17.8k | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R1 |
| 2 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R2, R3 |
| 1 | 4.32k | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R4 |
| 1 | 200k | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R5 |
| 1 | 23.2k | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R6 |
| 1 | 38.3k | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R7 |
| 2 | 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R8, R10 |
| 1 | 210k | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R9 |
| 1 | 0.068 | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R11 |
| 1 | 430k | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R12 |
| 1 | 606k | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R13 |
| 1 | 0.1 | R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R14 |
Eps design files
The KiCad project lives in the prasannan-robots/eps repository on GitHub; these links point at the commit this page was built from.
- Layouteps.kicad_pcb
- Schematiceps.kicad_sch
Eps: common questions
How big is the Eps PCB?
The Eps measures 90 × 96 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Eps?
50 components, from 36 distinct parts. The full bill of materials is listed on this page.
Where can I download the Eps design files?
From the prasannan-robots/eps repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Eps design in my own project?
The repository has no license, so all rights stay with prasannan-robots. Use it as a reference, and ask the author before reusing the design.