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STD Electronic load 12v 15A
License: Public Domain
Mode: Editors' pick
- 3
Update time：
2023-10-23 17:19:24
Creation time：
2021-06-16 08:58:46
Description
Microcontroller hold down the commanded current through full diapazone of temperature and voltage. Also controlled the fan RPM, reduce the current if fan can't cold radiator.
Microcontroller send through UART measured parameters and receive from UART commanded current.
Minimal foolproof.
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity | SMT Type | |
|---|---|---|---|---|---|---|
| 1 | 1uF | C1,C7,C14,C28,C29 | C0603 | 5 | CL10F104ZB8NNNC | |
| 2 | 100nF | C6,C12,C13,C16,C18,C19,C20,C21,C22,C23,C24,C26,C27 | C0603 | 13 | CL10F104ZB8NNNC | |
| 3 | 10uF | C15 | C0603 | 1 | CC0603KRX7R9BB104 | |
| 4 | 10uF | C17 | C0603 | 1 | JMK107ABJ106KAHT | |
| 5 | 10uF | C25 | C1206 | 1 | CL10F104ZB8NNNC | |
| 6 | 1N5819 | D4 | SOD-323_L1.8-W1.3-LS2.5-RD | 1 | 1N5819WS_C440261 | |
| 7 | ICSP | J1 | ICSP | 1 | HDR-M-2.54_1x5 | |
| 8 | Fan | J4 | HDR-M-2.54_1X2 | 1 | HDR-M-2.54_1x2 | |
| 9 | IRFZ44 | Q1,Q2,Q3,Q4,Q5,Q6,Q7,Q8 | TO-220 HOR | 8 | IRFZ44NPBF | |
| 10 | 2N7002 | Q10 | SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR | 1 | 2N7002 | |
| 11 | MTD3055EL | Q11 | TO-252-2_L6.6-W6.1-P4.58-LS9.9-BR | 1 | MTD3055EL | |
| 12 | 1k | R1,R7,R8,R9,R10,R12,R13,R14,R15,R16,R17,R18,R19,R20,R25,R26,R27,R28,R29,R30,R31,R32,R33,R34,R35,R36 | R0603 | 26 | R_0603_EU | |
| 13 | 8k2 % | R2,R40,R43,R48,R50 | R0603 | 5 | R_0603_EU | |
| 14 | 6k8 % | R11,R45 | R0603 | 2 | R_0603_EU | |
| 15 | 10k 3950 Al | R37 | NTC MF58_DO-35 | 1 | MF52A103H3950(A1) | |
| 16 | 3k3 % | R38 | R0603 | 1 | R_0603_EU | |
| 17 | 220k | R39,R44,R49 | R0603 | 3 | R_0603_EU | |
| 18 | 0.006 | R41 | CURRENT SHUNT 1225 | 1 | 2512_SHUNT_R003 | |
| 19 | 43k % | R42,R47,R51 | R0603 | 3 | R_0603_EU | |
| 20 | 10 | R46 | R0603 | 1 | R_0603_EU | |
| 21 | 330 | RN1 | RES-ARRAY-SMD_0402-8P-L2.0-W1.0-BL | 1 | 4D02WGJ0152TCE | |
| 22 | OLED_0.96 | U3 | OLED_0.96 | 1 | OLED_0.96 | |
| 23 | PIC24FJ16GA002-IML | U4 | QFN-ML28 | 1 | PIC24FJ16GA002-IML | |
| 24 | INA199A1 | U5 | SC-70-6_L2.2-W1.3-P0.65-LS2.1-BR | 1 | INA199A1DCKR | |
| 25 | SPX5205M5-3.3 | U6 | SOT-23-5_L3.0-W1.7-P0.95-LS2.8-TL | 1 | SPX5205M5-L-1-8/TR | |
| 26 | TactBtn | U7,U8,U9 | KEY-TACT-SMD-5.05*5.05*H COPY | 3 | TactBtn | |
| 27 | AT78L05 | U10 | SOT-89-3_L4.5-W2.5-P1.50-LS4.0-BR | 1 | AT78L05SQ-N | |
| 28 | 24C02 | U15 | SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL | 1 | 24C02/TR | |
| 29 | micro USBFemale | USB1 | MICRO-USB-SMD_5P-P0.65-H-F_C10418 | 1 | micro USBFemale | |
| 30 | LM224 | U1,U2 | SOIC-14_L8.7-W3.9-P1.27-LS6.0-BL | 2 | LM224DT | 1 |
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