2-Coil-Economizer
About the 2-Coil-Economizer PCB
2-Coil-Economizer is an open source PCB design by jrbe, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 68 × 55 mm, with 99 components from 25 distinct parts.
Other key parts include the C1879940 and TPS7B8250QDGNRQ1. By type, the board carries 38 resistors, 26 jumpers, 19 capacitors, 7 diodes, 4 transistors and 3 ICs.
From the project
2 Coil DRV103 Economizer PCB 8-28v
This V1.1 version is not working. The transistor is flipped on each channel and the DRV103's I got seem to be counterfeit. Plan is to eventually swap both DRV103's to 556 timers and to a logic ic for flexible input control to reduce cost, eliminate the DRV issues, and simplify the whole project. I do not have a need for this currently and have not had the free time to troubleshoot or rework it yet.
Main components on the 2-Coil-Economizer
2-Coil-Economizer bill of materials (BOM)
99 components, 25 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | C1879940 DRV103 SO-8 | DRV103 No Heatsink | U1, U3 |
| 1 | TPS7B8250QDGNRQ1 | SOP65P490X110-9N | U2 |
| 2 | C8326 PNP | SOT-23 | Q1, Q2 |
| 2 | SUD50P10-43L | TO-252-2 | Q3, Q4 |
| 2 | JUMPER_3_OPEN Jumper_3_Open | SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP26 |
| 16 | SJC | SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP2, JP3, JP4, JP9, JP10, JP11, JP12, JP13 +8 |
| 8 | SJO | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP5, JP6, JP7, JP8, JP17, JP18, JP19, JP20 |
| 2 | TestPoint | TestPoint_THTPad_1.0x1.0mm_Drill0.5mm | TP1, TP2 |
| 2 | C22452 D_Schottky | D_SMA_Handsoldering | D1, D2 |
| 2 | C173413 D_Zener | D_SOD-123 | D3, D4 |
| 1 | C235776 D_Zener | D_SMA | D5 |
| 2 | D_16V_ZENER D_16V_Zener | D_SMB | D6, D7 |
| 3 | 22UF_LOWR 22uF_LowR | CP_EIA-7343-15_Kemet-W_Pad2.25x2.55mm_HandSolder | C1, C8, C19 |
| 12 | 100NF 100nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C5, C6, C7, C12, C13, C14, C15 +4 |
| 2 | 10UF 10uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4 |
| 2 | 220NF 220nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10, C11 |
| 2 | 2.2K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R31 |
| 6 | 10K 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R7, R17, R18, R32 |
| 6 | 4.7K 4.7k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R5, R6, R28, R29, R30 |
| 4 | 100K 100k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R25, R33, R34 |
Show 5 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 12 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R10, R11, R12, R13, R14, R19, R20 +4 |
| 2 | 255K 255k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R15, R27 |
| 2 | 1M | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16, R26 |
| 2 | 3k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R35, R36 |
| 2 | C309610 100R 2W/3W | SMD_Res 3W 12x5.8 & 2512 | R37, R38 |
2-Coil-Economizer design files
The KiCad project lives in the jrbe/2-Coil-Economizer-PCB repository on GitHub; these links point at the commit this page was built from.
2-Coil-Economizer: common questions
How big is the 2-Coil-Economizer PCB?
The 2-Coil-Economizer measures 68 × 55 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 2-Coil-Economizer?
99 components, from 25 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 2-Coil-Economizer design files?
From the jrbe/2-Coil-Economizer-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 2-Coil-Economizer design in my own project?
Yes, under the terms of its GPL-3.0 license, which jrbe chose for the repository.