Joule Thief
Joule Thief is an open source PCB design by fishPointer: a 2-layer, 129.8 × 50.8 mm board with 32 components (24 distinct parts). It is built around the INA219AXD, LTC3105XMS, AD5280, DW01 and more. Filed under power & battery.
Objectives: - Extract all usable electrical energy from used/"dead" Alkaline Cells (AA, AAA, etc.) - Measure & Log energy extraction data from each cell & deliver analytics - Efficiently convert and push energy extracted into a Li-Ion power bank
Objectives: - Extract all usable electrical energy from used/"dead" Alkaline Cells (AA, AAA, etc.) - Measure & Log energy extraction data from each cell & deliver analytics - Efficiently convert and push energy extracted into a Li-Ion power bank
Topology - INA219 - Energy Metering - LTC3105 - Low Voltage Boost Converter - AD5280 - Digital Potentiometer, 200kΩ - DW01 - 18650 Single-cell BMS - TP4056 - Single-cell 18650 Charger - FS8205 - Dual-FET package for DW01 - AO3400 - Low Voltage N-E-FET - 1N5817 - Low Voltage Schottky Diode
Built around
Parts list
32 components, 24 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | INA219AXD INA219AxD | SOIC-8_3.9x4.9mm_P1.27mm | U1, U4 |
| 1 | LTC3105XMS LTC3105xMS | MSOP-12_3x4.039mm_P0.65mm | U2 |
| 1 | AD5280 | TSSOP-14_4.4x5mm_P0.65mm | U3 |
| 1 | DW01 | SOT-23-6_Handsoldering | U5 |
| 1 | FS8205A | FS8205A_Wide | U7 |
| 1 | Alkaline AA | AA_Cell_Clip_V2 | BATT_1 |
| 1 | Conn_01x06 | JST_PH_B6B-PH-K_1x06_P2.00mm_Vertical | J_OUT1 |
| 1 | 18650 | 18650_Cell_Clip_V2 | LITH1 |
| 1 | SW_DPDT_x2 | SS22F25_DPDT_Straight_V2 | SW1 |
| 1 | D_Schottky | D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | 10U 10u | Power_Inductor_101040 | L1 |
| 3 | 0.1U 0.1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C9, C10 |
| 2 | 0.1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C7 |
| 1 | 0.1U 100u | CP_Radial_D5.0mm_P2.00mm | C3 |
| 1 | 100U 10u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 10U 4.7u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6 |
| 1 | 4.7U 0.1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 2 | 0.1R | R_Shunt_2512_V2 | R1, R6 |
| 4 | 10 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R7, R8 |
Show 4 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1M | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 220K 220k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 100 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 1 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
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