Psu
About the Psu PCB
Psu is an open source PCB design by eshazen, published on GitHub. It is a 2-layer board measuring 177.8 × 114.3 mm, with 61 components from 34 distinct parts.
Other key parts include the 6SN7. By type, the board carries 15 capacitors, 14 connectors, 13 diodes, 13 resistors, 1 IC and 1 transistor.
From the project
2023-02-23 Mostly working. Relay wiring incorrect (see ECOs). Otherwise all outputs verified working, at least with no load.
2023-02-23 Mostly working. Relay wiring incorrect (see ECOs). Otherwise all outputs verified working, at least with no load.
C13 should be much bigger, maybe 4700uF Bridge footprints are wrong (holes way too small) Relay wiring is incorrect Can't use the S4 or S6 outputs of the CW multipler, only S5, S7. Maybe add an S3 tap? In any case, fix J14 wiring.
AC power entry, fuse, power switch +8V for logic (~1A) regulator on CPU board makes 5V for DAC (Antek 6.3V winding too wimpy) -5V for Z axis drive (low current). Should be regulated 8-stage CW generator for -1500V Jumpers to select output…
Main components on the Psu
Psu bill of materials (BOM)
61 components, 34 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 6SN7 LM7905_TO220 | TO-220-3_Vertical | U1 |
| 1 | NMOS | TO-220-3_Vertical | Q1 |
| 1 | CONN_01X02 Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | CONN_01X04 Conn_01x05 | GSP1.8101.1 | J2 |
| 1 | CONN_01X03 Conn_01x02 | Molex_KK-396_A-41791-0002_1x02_P3.96mm_Vertical | J3 |
| 1 | CONN_01X06 Conn_01x06 | Molex_KK-396_A-41791-0006_1x06_P3.96mm_Vertical | J4 |
| 3 | Conn_01x03 | Molex_KK-396_A-41791-0003_1x03_P3.96mm_Vertical | J5, J8, J13 |
| 1 | Conn_01x05 | Molex_KK-396_A-41791-0005_1x05_P3.96mm_Vertical | J6 |
| 1 | Conn_01x08 | Molex_KK-396_A-41791-0008_1x08_P3.96mm_Vertical | J7 |
| 2 | Conn_01x04 | Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J9, J10 |
| 2 | Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J12, J15 |
| 1 | Conn_01x05 | Molex_KK-396_5273-05A_1x05_P3.96mm_Vertical | J14 |
| 1 | Fuse | HBH-I-R | F1 |
| 1 | PR16-12V-540-2C | DIP-22_W7.62mm_LongPads | K1 |
| 1 | SW_SPST | 8GA1016-Z | SW1 |
| 1 | A1A | LED_D1.8mm_W1.8mm_H2.4mm_Horizontal_O3.81mm_Z4.9mm | NE1 |
| 10 | 1N4007 | D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2, D3, D4, D5, D6, D7, D8 +2 |
| 2 | D_Bridge_+-AA | Diode_Bridge_19.0x3.5x10.0mm_P5.0mm | D11, D14 |
| 1 | LED | LED_D3.0mm | D12 |
| 3 | 47u 400V | CP_Radial_D12.5mm_P5.00mm | C1, C5, C6 |
Show 14 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 100u 400V | CP_Radial_D22.0mm_P10.00mm_SnapIn | C2, C14, C15 |
| 1 | 0.025UF 47u 400V | CP_Radial_D12.5mm_P5.00mm | C3 |
| 1 | 0.025UF 100u 400V | CP_Radial_D22.0mm_P10.00mm_SnapIn | C4 |
| 2 | 220PF 47u 400V | CP_Radial_D12.5mm_P5.00mm | C7, C8 |
| 2 | 0.1UF 47u 400V | CP_Radial_D12.5mm_P5.00mm | C9, C10 |
| 2 | 10u 25V | CP_Radial_D5.0mm_P2.00mm | C11, C13 |
| 1 | 1u 10V | C_Disc_D5.0mm_W2.5mm_P5.00mm | C12 |
| 1 | 100 ohm 1/2W | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R1 |
| 1 | 120 ohm 5W | R_Axial_DIN0617_L17.0mm_D6.0mm_P25.40mm_Horizontal | R2 |
| 1 | 100k | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R3 |
| 2 | 200 ohm 5W | R_Axial_DIN0617_L17.0mm_D6.0mm_P25.40mm_Horizontal | R4, R5 |
| 6 | 1.0M 2W | R_Axial_DIN0309_L9.0mm_D3.2mm_P15.24mm_Horizontal | R6, R7, R8, R9, R10, R11 |
| 1 | 10k | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R12 |
| 1 | 1.8K 3.3K | R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R13 |
Psu design files
The KiCad project lives in the eshazen/scope-clock repository on GitHub; these links point at the commit this page was built from.
Psu: common questions
How big is the Psu PCB?
The Psu measures 177.8 × 114.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Psu?
61 components, from 34 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 Psu design files?
From the eshazen/scope-clock 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 Psu design in my own project?
The repository has no license, so all rights stay with eshazen. Use it as a reference, and ask the author before reusing the design.
