Eval » Historie » Version 6
Maximilian Seesslen, 20.04.2023 13:49
| 1 | 1 | Maximilian Seesslen | h1. Eval |
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| 2 | |||
| 3 | h1. Overall design |
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| 4 | |||
| 5 | * 4 x red+green LEDs for condition |
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| 6 | * Restart button |
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| 7 | 4 | Maximilian Seesslen | * Rotate over the ADC channels and get Voltage level |
| 8 | * draw 100mA |
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| 9 | * Die Kabel haben AWG28, 212.9 Ohm/km, 1.4 A nach erde, 0.23 A versorgung |
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| 10 | * https://de.wikipedia.org/wiki/E-Reihe#/media/Datei:E12_values_graph.svg |
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| 11 | |||
| 12 | U2=((U*R2)/R_GES) |
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| 13 | |||
| 14 | 5 | Maximilian Seesslen | U |
| 15 | 4 | Maximilian Seesslen | R*I |
| 16 | |||
| 17 | 5V/0,1A= 50 Ohm |
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| 18 | 5V*0,1A= 0,5 W |
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| 19 | |||
| 20 | RGes = R1+R2 = 50 |
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| 21 | |||
| 22 | 1 | Maximilian Seesslen | 3V=(5*R2)/50 |
| 23 | 5 | Maximilian Seesslen | R2 = (3*50)/5 = 30 -> 27 |
| 24 | R1 = 22 |
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| 25 | RGES = 49 |
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| 26 | |||
| 27 | U2 = 5*27/49 = 2,755102 |
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| 28 | 1 | Maximilian Seesslen | |
| 29 | h1. MCU |
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| 30 | 2 | Maximilian Seesslen | |
| 31 | * "stm32f051c4":https://www.mouser.de/datasheet/2/389/stm32f051c4-1851079.pdf |
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| 32 | ** I have 17; |
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| 33 | 3 | Maximilian Seesslen | ** 16 ADC channels |
| 34 | 6 | Maximilian Seesslen | * STM32G030C8T6 |
| 35 | ** nearly same specs but smaller footprint; LQFP 48 |