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STD 6 channel Isolated Meter
License: CERN Open Hardware License
Mode: Editors' pick
- 2
Update time：
2024-03-07 13:11:25
Creation time：
2022-02-20 00:34:22
Description
Isolated channels of low voltage and current meter for independent and universal measurement system based on Raspberry Pico.
For voltage there is autoranging using the internal PGA with 1x to 8x gain. Input impedance is for now 160 kOhm with highest input voltage of around 32 V. Current input uses shunt resistor on board, optimal voltage drop for full scale on 8x gain is 0.25 V. 0.1 Ohm shunt means -2.5 to +2.5 A range .
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schematic diagram
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| ID | Name | Designator | Footprint | Quantity | Contributor | |
|---|---|---|---|---|---|---|
| 1 | 10uF | C1,C2,C23 | CAP-SMD_L3.2-W1.6-R-RD | 3 | TAJA106K016RNJ | |
| 2 | 100nF | C3,C4,C11,C12,C13,C14,C15,C16,C17,C18,C19,C20,C21,C22,C24,C25 | C0603 | 16 | CC0603KRX7R9BB104 | |
| 3 | 1uF | C5,C6 | C0805 | 2 | CL21B105KBFNNNE | |
| 4 | 10uF | C7,C8 | C0805 | 2 | CL21A106KAYNNNE | |
| 5 | 27pF | C9,C10 | C0603 | 2 | CL10C270JB8NNNC | |
| 6 | 1N5819WS | D1,D2 | SOD-323_L1.8-W1.3-LS2.5-RD | 2 | 1N5819WS | |
| 7 | SMBJ5.0A_C10204 | D4 | SMB_L4.6-W3.6-LS5.3-R-RD | 1 | SMBJ5.0A_C10204 | |
| 8 | M7_C95872 | D7,D8,D9,D5,D6 | DO-214AC_L4.3-W2.7-LS5.3-RD | 5 | M7_C95872 | |
| 9 | Header-Male-2.54_1x3 | H1 | HDR-TH_3P-P2.54-V-M-1 | 1 | Header-Male-2.54_1x3 | |
| 10 | Header-Male-2.54_1x4 | H2 | HDR-TH_4P-P2.54-V-M | 1 | Header-Male-2.54_1x4 | |
| 11 | 19-217/GHC-YR1S2/3T | LED1,LED2,LED3,LED4 | LED0603-R-RD | 4 | 19-217/GHC-YR1S2/3T | |
| 12 | 27.4Ω | R2,R3 | R0603 | 2 | 0603WAF274JT5E | |
| 13 | 1kΩ | R4,R5,R9,R14 | R0603 | 4 | 0603WAF1001T5E | |
| 14 | 5.1kΩ | R6,R7,R11,R12 | R0603 | 4 | 0603WAF5101T5E | |
| 15 | 220Ω | R8,R13 | R0603 | 2 | 0603WAF2200T5E | |
| 16 | 10kΩ | R10,R17,R18,R16 | R0603 | 4 | 0603WAF1002T5E | |
| 17 | JUMPER-PAD-2-NOYES_SILK | SJ3,SJ1,SJ2 | PAD-JUMPER-2-NO_YES_SILK | 3 | JUMPER-PAD-2-NOYES_SILK | |
| 18 | TS-1187A-B-A-B | SW1,SW2 | SW-SMD_4P-L5.1-W5.1-P3.70-LS6.5-TL-2 | 2 | TS-1187A-B-A-B | |
| 19 | SRV05-4-P-T7 | TV1 | SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR | 1 | SRV05-4-P-T7 | |
| 20 | RP2040 | U1 | LQFN-56_L7.0-W7.0-P0.4-EP | 1 | RP2040 | |
| 21 | P25Q80H | U2 | SOIC-8_150MIL | 1 | P25Q80H | |
| 22 | MCP3421A0T-E/CH | U3 | SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR | 1 | MCP3421A0T-E/CH | |
| 23 | π122U31 | U4 | SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL | 1 | π122U31 | |
| 24 | W25Q16JVSSIQ | U5 | SOIC-8_L5.3-W5.3-P1.27-LS8.0-BL | 1 | W25Q16JVSSIQ | |
| 25 | B0505S-1WR3 | U6 | PWRM-TH_B0503S-1WR2 | 1 | B0505S-1WR3 | |
| 26 | HT7533-1_C14289 | U7 | SOT-89-3_L4.5-W2.5-P1.50-LS4.2-BR | 1 | HT7533-1_C14289 | |
| 27 | 128x32 OLED | U10 | 128X32 OLED | 1 | 128x32 OLED | |
| 28 | USB3.1C16PFSMT | USBC1 | USB-C-SMD_TYPE-C-USB-17 | 1 | USB3.1C16PFSMT | |
| 29 | 12MHz | X1 | OSC-SMD_4P-L3.2-W2.5-BL | 1 | X322512MSB4SI | |
| 30 | nSMD005 | F1 | F1206 | 1 | nSMD005 | |
| 31 | HDR-M-2.54_1x1 | J1,J2 | HDR-M-2.54_1X1 | 2 | HDR-M-2.54_1x1 | |
| 32 | 0.05Ω | R1 | R2728 | 1 | LR2728-24R050F1 | |
| 33 | 150kΩ | R15 | R0805 | 1 | 0805W8F1503T5E | |
| 34 | Electrical Lead Connector | U8,U9 | ELECTRICAL LEAD CONNECTOR | 2 | Electrical Lead Connector | https://lcsc.com/product-detail/Banana-Connectors-Alligator-Clips-Test-Rings_Changzhou-Amass-Elec-24-301_C99097.html |
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