Eval » Historie » Version 28
Redmine Admin, 13.12.2021 13:59
| 1 | 1 | Redmine Admin | h1. Eval |
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| 2 | |||
| 3 | 6 | Redmine Admin | h2. V2 |
| 4 | 7 | Redmine Admin | |
| 5 | 8 | Redmine Admin | -New version with I2C EEPROM?- Oh wait, there is an internal EEPROM. |
| 6 | 9 | Redmine Admin | -Uart not even neccessary. Fancy GDB-Magic can be used. |
| 7 | 10 | Redmine Admin | At the moment its probably an STM32L011F4P6.- Uart for configuring is needed. "Customer" should be able to configure it with adapter via USB. |
| 8 | 3 | Redmine Admin | So UART would be nice then. Assume its already wired correctly. |
| 9 | 4 | Redmine Admin | |
| 10 | 25 | Redmine Admin | An adapter for UART to USB would be nice. So able to configure it without STLink. MCP2221 looks good. "Ophio":http://hase.seesslen.net/redmine/projects/ophio |
| 11 | 16 | Redmine Admin | |
| 12 | 28 | Redmine Admin | "STM32L031F6":https://www.st.com/resource/en/datasheet/stm32l031f6.pdf |
| 13 | 12 | Redmine Admin | STM32L031F6P6 has 32KB.January 2022; 2,22920€ @ 25pc. EEPROM is also integrated. Pin-kompability to be checked. |
| 14 | 14 | Redmine Admin | STM32L031F6P7 is 2,38520€ @ 25pc. 717 available. "Link":https://www.digikey.de/de/products/detail/stmicroelectronics/STM32F042F6P6/5268189 |
| 15 | 15 | Maximilian Seesslen | Pins are the same, Uart is on the same pins. Buzzer same, SWD same. |
| 16 | 6 | Redmine Admin | |
| 17 | 18 | Redmine Admin | UART works as expected (STM32L011). Binary Size is still ok (Release only, Debug not possible). |
| 18 | 19 | Maximilian Seesslen | STerm is way to big (4K over size). Have to look whats the issue there. Faking a 64K Version, making full debug image and check symbol sizes. |
| 19 | 24 | Redmine Admin | |
| 20 | h2. Battery life |
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| 21 | |||
| 22 | "Unterschwelleneffekt":https://de.wikipedia.org/wiki/Unterschwelleneffekt / leakage current |
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| 23 | |||
| 24 | Buzzer is now driven by MOSFET. The "Zero Gate Voltage Drain Current" is relevant for battery life in unused status. |
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| 25 | "Nexpedia":https://assets.nexperia.com/documents/user-manual/Nexperia_document_book_MOSFETGaNFETApplicationHandbook_2020.pdf |
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| 26 | Most manufactures specify an "Zero Gate Voltage Drain Current" of 1µA at 20-30V. Temperature has an big impact. |
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| 27 | |||
| 28 | Vergleichen mit verwendetem Transistor; |
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| 29 | "NPN":https://www.reichelt.de/bipolartransistor-npn-45-v-0-5-a-0-225-w-sot-23-bcx-19-smd-p90184.html (3.2.2019) |
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| 30 | IE scheint 0, ICB ist mit 100nA angegeben |
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| 31 | |||
| 32 | Einfach Messen... ist sowieso ein guter Geraete-Test |
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| 33 | |||
| 34 | 20 | Maximilian Seesslen | 150-280mAh, Panasonic: 220mAh |
| 35 | 1 | Redmine Admin | 5-9h bei 30mA |
| 36 | 21 | Maximilian Seesslen | |
| 37 | 1 | Redmine Admin | Buzzer: |
| 38 | 3/(16+22)=80mA (permanent)-> 40mA; 5,5h |
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| 39 | 3 / (16 + 51) = 45mA -> 22,5mA; 9,7h |
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| 40 | 26 | Redmine Admin | |
| 41 | h2. Power Range |
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| 42 | |||
| 43 | The MCU STM32L031x4 runs with 1.65V to 3.6V. "Battery1":https://docs.rs-online.com/fae6/A700000008139582.pdf "Battery2":https://docs.rs-online.com/01fa/0900766b817143bf.pdf specify a capacity of 235mAh to 2.0 volts |
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| 44 | LEDs should be visible at 2Volts. VGS@2.0V should bring ID of 6A. |
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| 45 | 27 | Redmine Admin | |
| 46 | The white LED probably has to be replaced |