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- | {{tag> | + | ==== Modifications |
- | ===== Building the UI V1.8 Board ===== | + | |
- | ==== OVI40 UI V1.7 Documents | + | === Temporary Modification: |
- | **UI V1.7 documents are provided for information only**. Please primarily use the V1.8 documents for building the UI V1.8 board. | + | |
- | * {{:projekte: | + | Symptom: In stand-by the current drawn from back-up battery is excessively high. Work-around: Put resistor in parallel to C94. Start with a value of 56k - this seems to work in most cases. If board does not start increase value slightly. The same approach is used BTW in the commercially available Disco F746 prototype board. |
- | * {{: | + | |
- | * {{: | + | |
- | Please note that the component placement docs are searchable pdf documents. During soldering they can be used to quickly find a component' | + | === Change brightness of LEDs === |
- | ==== OVI40 UI V1.8 Documents ==== | + | Helle LEDS: Mit den Bausatz-Vorwiderständen leuchten die LEDs sehr hell. DF9EH hat die Werte reduziert: |
- | * {{: | ||
- | * [[: | ||
- | * {{: | ||
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- | ==== OVI40 UI V1.8 Kit Contents ==== | ||
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- | The kit contains UI V1.8 PCB, components in bags and packing list. The display is delivered as assembled and tested unit. | ||
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- | |[{{: | ||
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- | ==== Assembly and Soldering ==== | ||
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- | The graphics below - UI V1.7 with 3.2" Display - give an impression on how the finished V1.8 UI board will look like: | ||
- | |< 95% 50% 50% >| | ||
- | | [{{: | ||
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- | === Please read Errata carefully === | ||
- | Make sure to read the [[: | ||
- | \\ | ||
- | === IC Device Markings === | ||
- | The smaller ICs can be identified by device mark. The following device marks are used: | ||
- | |< 45% 25% 25% 25% 25% >| | ||
- | |Typ |Device Mark |Schematic | ||
- | |LP5907_Q1 | ||
- | |BAV70 | ||
- | |BC857B | ||
- | |BAS85 | ||
- | \\ | ||
- | === MCU STM32 "Pin 1" marking === | ||
- | Please understand the correct orientation of STM32 MCU Pin 1. There are two markings on the IC. | ||
- | Please not the text printed on MCU to find the correct Pin 1: When reading the text Pin 1 is on bottom left corner. | ||
- | [{{: | ||
- | \\ | ||
- | === STM32F76X_ZIT vs. STM32H743ZIT6 === | ||
- | The kit is shipped with STM32F76X_ZIT (" | ||
- | It is suggested to use the F7 for now. Rwason: it is planned to support the H7 in the UHSDR, but no boot loader oder firmware is released for the H7 at the moment. | ||
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- | Comparison of MCUs: | ||
- | |||
- | |< 90% 25% 25% 25% 25% >| | ||
- | | | ||
- | | | ||
- | |Flash[kB] | ||
- | |RAM [kB] |192 |512 |1024 | | ||
- | |Clock[MHz] | ||
- | |FPU |single | ||
- | |Pins |100 |144 |144 | | ||
- | |DMIPS | ||
- | \\ | ||
- | === EEPROM IC7 orientation === | ||
- | [{{: | ||
- | |||
- | This is where the dot is printed. Also the edge of the case is slanted near the 1-4 pins. See [[http:// | ||
- | \\ | ||
- | === Prevent short cut with back up battery holder === | ||
- | One of the connection pins of the battery holder might touch ground connection of a rotary encoder. Make sure to cut this pin flush with PCB surface **before soldering** - see photo: | ||
- | [{{: | ||
- | \\ | ||
- | === Polarised capacitors === | ||
- | Please observe mounting orientation of tantal and electrolytic capacitors. Markings on the capacitors are explained [[http:// | ||
- | \\ | ||
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- | === Mounting locations of switches S7 and S8 === | ||
- | Two different mounting locations are provided on the UI PCB for S7 and S8: | ||
- | * "mcHF style": | ||
- | * "OVI40 style": | ||
- | |||
- | "In line" is the preferred mounting location for S7 and S8. | ||
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- | ==== Modifications ==== | ||
- | |||
- | === Temporary Modification: | ||
- | Symptom: In stand-by the current drawn from back-up battery is excessively high. | ||
- | Work-around: | ||
- | \\ | ||
- | === Change brightness of LEDs === | ||
- | Helle LEDS: Mit den Bausatz-Vorwiderständen leuchten die LEDs sehr hell. DF9EH hat die Werte reduziert: | ||
* R36 auf 22,6k (D1 grün) | * R36 auf 22,6k (D1 grün) | ||
* R37 auf 6,8k (D2 rot) | * R37 auf 6,8k (D2 rot) | ||
* R116 auf 6,8k (D3 blau) | * R116 auf 6,8k (D3 blau) | ||
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