Power supply
About the Power supply PCB
Power supply is an open source PCB design by sbstnh, published on GitHub under the BSD-3-Clause license. It is a 2-layer board measuring 70 × 159.5 mm, with 38 components from 31 distinct parts.
Other key parts include the AP63200WU and AP63203WU. By type, the board carries 16 capacitors, 4 connectors, 4 test points, 4 resistors, 3 diodes and 2 ICs.
It belongs with the power & battery designs in this gallery.
From the project
A SCPI programmable precision resistor
WARNING: The programmable power resistor presented is mains powered. On the power supply board there will be mains/line voltage. Working with/on such devices can lead to damage, injury or death. Don't do it if you're not qualified or authorized to do so. You use the circuits described at you own risk. You have to make sure that the circuit is safe and adheres to the applicable standards in your location. You might operate the mainboard and ui board more safely with a bench or external power supply.
Main components on the Power supply
Power supply bill of materials (BOM)
38 components, 31 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AP63200WU | TSOT-23-6 | U101 |
| 1 | AP63203WU | TSOT-23-6 | U102 |
| 1 | LINE | Molex_KK-396_A-41791-0005_1x05_P3.96mm_Vertical | J101 |
| 1 | PWR_CH1 | Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J102 |
| 1 | PWR_CH2 | Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J103 |
| 1 | PWR_UI_BOARD | Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J104 |
| 1 | Fuse | Fuse_1206_3216Metric | F101 |
| 1 | SW_DPDT_x2 | NE1848EE | SW101 |
| 1 | Transformer_1P_1S | BLOCK_VC16_1 | T101 |
| 1 | +15V | TestPoint_Keystone_5000-5004_Miniature | TP101 |
| 1 | +3.3V | TestPoint_Keystone_5000-5004_Miniature | TP102 |
| 1 | UNREG | TestPoint_Keystone_5000-5004_Miniature | TP103 |
| 1 | GND | TestPoint_Keystone_5000-5004_Miniature | TP104 |
| 1 | B250S2A-SLIM | Diode_Bridge_Diotec_SO-DIL-Slim | D101 |
| 2 | GR | LED_0603_1608Metric | D102, D103 |
| 1 | 10u | L_Bourns-SRN4018 | L101 |
| 1 | 3.9u | L_Bourns-SRN4018 | L102 |
| 1 | 100n | C_Rect_L18.0mm_W5.0mm_P15.00mm_FKS3_FKP3 | C101 |
| 2 | 1n | C_Rect_L13.5mm_W5.0mm_P10.00mm_FKS3_FKP3_MKS4 | C102, C103 |
| 2 | 1u | C_1206_3216Metric | C104, C105 |
Show 11 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 100n | C_0805_2012Metric | C106 |
| 1 | 1u | C_0805_2012Metric | C107 |
| 2 | 100n | C_0603_1608Metric | C108, C109 |
| 1 | 1000u | CP_Radial_D16.0mm_P7.50mm | C110 |
| 1 | 56p | C_0603_1608Metric | C111 |
| 4 | 22u | C_1206_3216Metric | C112, C113, C114, C115 |
| 1 | 68u | C_Elec_6.3x5.8 | C116 |
| 1 | 270k | R_0603_1608Metric | R101 |
| 1 | 15k | R_0603_1608Metric | R102 |
| 1 | 62k | R_0603_1608Metric | R103 |
| 1 | 6.2k | R_0603_1608Metric | R104 |
Power supply design files
The KiCad project lives in the sbstnh/programmable_precision_resistor repository on GitHub; these links point at the commit this page was built from.
Power supply: common questions
How big is the Power supply PCB?
The Power supply measures 70 × 159.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Power supply?
38 components, from 31 distinct parts. The full bill of materials is listed on this page.
Where can I download the Power supply design files?
From the sbstnh/programmable_precision_resistor repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Power supply design in my own project?
Yes, under the terms of its BSD-3-Clause license, which sbstnh chose for the repository.
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