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STD MLX90640 thermal imager【OSHWhub】
Profile：MLX90640 is used as a sensor thermal imager, the main control is stm32f401ccu6, the onboard flash is used as a U disk to save pictures, powered by lithium battery, 2-inch screen, small tool for testing whether the circuit board is hot
License: MIT
Description
project from oswhhub user sjj12345
mlx90640, although the price is not cheap, but it is much cheaper than the finished product (the function is also corresponding to a little less), the main control stm32f401ccu6, the charging chip ip2312, and an 8m "big" flash soldered to the external flash, it feels like saving pictures Enough. The screen uses a 2-inch spi screen. The refresh is a bit slow (it can be used). The circuit board picture is as follows
Since it is a product, I drew a shell
The program part uses bilinear interpolation, transfers the corresponding sensor pixels to the screen display size minus a little space left by the edge, and uses it to write the interface. It uses the ready-made functions in the dsp library, and the processing speed of the actual measurement and handwriting is no different.
With the addition of a file system, saving pictures is a bit slow, taking several seconds
actual eff
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity | Paste Type | |
|---|---|---|---|---|---|---|
| 1 | 15pF | C1,C2 | C0603 | 2 | CC0603JRNPO8BN150 | |
| 2 | 4.7uF | C3,C16 | C0603 | 2 | CC0603KRX5R6BB475 | |
| 3 | 100nF | C4,C5,C6,C7,C17,C18,C19,C20 | C0603 | 8 | CC0603KRX7R9BB104 | |
| 4 | 22uF | C8,C10,C11 | C0805 | 3 | CL21A226MAYNNNE | |
| 5 | 10uF | C9,C12 | C0805 | 2 | 0805X106M250NT | |
| 6 | 4.7uF | C13 | C0603 | 1 | CL10A475KP8NNNC | |
| 7 | 22pF | C14 | C0603 | 1 | CC0603FRNPO9BN220 | |
| 8 | 10uF | C15 | C0603 | 1 | GRT188R61E106ME13D | |
| 9 | LESD3Z5.0CMT1G | D2,D3 | SOD-323_L1.8-W1.3-LS2.5-BI | 2 | LESD3Z5.0CMT1G | |
| 10 | 0.5K-AS-22PWBG | FPC1 | FPC-SMD_22P-P0.50_0.5K-AS-22PWB | 1 | 0.5K-AS-22PWBG | |
| 11 | HDR-M-2.54_1x4 | J1,J2 | HDR-M-2.54_1X4 | 2 | HDR-M-2.54_1x4 | |
| 12 | HDR-M-2.54_1x2 | J3 | HDR-M-2.54_1X2 | 1 | HDR-M-2.54_1x2 | |
| 13 | SIQ-02FVS3 | K1 | SIQ-02FVS3 | 1 | SIQ-02FVS3 | |
| 14 | 10uH | L1 | L0805 | 1 | MLZ2012E100MT000 | |
| 15 | 1uH | L2 | IND-SMD_L5.4-W5.2 | 1 | YSPI0520-1R0M | |
| 16 | 2.2uH | L3 | L0806 | 1 | LQM2MPN2R2MEHL | |
| 17 | D-G060306G1-KS2 | LED1,LED2,LED3 | LED0603-RD | 3 | D-G060306G1-KS2 | |
| 18 | S8050_C908252 | Q1 | SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR | 1 | S8050_C908252 | |
| 19 | 0 | R1 | R0603 | 1 | 0603WAF0000T5E | |
| 20 | 5.1K | R2,R3 | R0603 | 2 | 0603WAJ0512T5E | |
| 21 | 10K | R4,R18,R19 | R0603 | 3 | TC0325B1002T5E | |
| 22 | 1K | R5 | R0603 | 1 | TC0325B1002T5E | |
| 23 | 2 | R6 | R0603 | 1 | 0603WAF200KT5E | |
| 24 | 0.5 | R7 | R0805 | 1 | RTT05R500FTP | |
| 25 | 1K | R8 | R0603 | 1 | RMC06031K1%N | |
| 26 | 51K | R9 | R0603 | 1 | AR03BTCX5102 | |
| 27 | 100 | R10,R11 | R0603 | 2 | CR0603JA0101G | |
| 28 | 10R | R12 | R0603 | 1 | TC0325B1002T5E | |
| 29 | 10K | R13,R14 | R0603 | 2 | 0603WAF1002T5E | |
| 30 | 22 | R15,R16 | R0603 | 2 | 0603WAJ0220T5E | |
| 31 | 1K | R17 | R0603 | 1 | 0603WAF1002T5E | |
| 32 | 4.7K | R20,R21 | R0603 | 2 | RC0603JR-074K7L | |
| 33 | 442k | R22 | R0603 | 1 | CR0603JA0101G | |
| 34 | 160k | R23 | R0603 | 1 | CR0603JA0101G | |
| 35 | 680K | R26 | R0603 | 1 | TC0325F6803T5E | |
| 36 | 150K | R27 | R0603 | 1 | TR0603B150KP0525 | |
| 37 | ST-1185S | SW1,SW2 | SW-SMD_ST-1185S | 2 | ST-1185S | |
| 38 | MK-12C02-G025 | SW3 | SW-SMD_MK-12C02-G025 | 1 | MK-12C02-G025 | |
| 39 | TS-1086E-AC03526 | SW4,SW5 | SW-SMD_TS-1086E-AC03526 | 2 | TS-1086E-AC03526 | |
| 40 | W25Q32JVSSIQ_C179173 | U3 | SOIC-8_L5.3-W5.3-P1.27-LS8.0-BL | 1 | W25Q32JVSSIQ_C179173 | |
| 41 | IP2312-4V35 | U4 | ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP | 1 | IP2312-4V35 | |
| 42 | MLX90640(110POV) | U5 | MLX90640 | 1 | MLX90640(110POV) | |
| 43 | SY8088AAC | U6 | SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BR | 1 | SY8088AAC | |
| 44 | TYPE-611-T3 | USB1 | USB-C-SMD_TYPE-611-T3 | 1 | TYPE-611-T3 | |
| 45 | 25MHz | X1 | OSC-SMD_4P-L3.2-W2.5-BL | 1 | XXCEELNANF-25MHZ | |
| 46 | STM32F401CCU6 | U1,U2 | UFQFPN-48_L7.0-W7.0-P0.50-BL-EP | 2 | STM32F401CCU6 | 1 |
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