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@ -24,7 +24,7 @@ Pull requests with improvements, translations and bug fixes are welcome!
# Introduction # Introduction
The sonde is to be divided into six functional blocks, which are highlighted in the following picture. The sonde is to be divided into six functional blocks, which are highlighted in the following picture.
* [Power Supply](#Power supply) * [Power Supply](#powersupply)
* [Microcontroller](#microcontroller) * [Microcontroller](#microcontroller)
* [Front end](#frontend) * [Front end](#frontend)
* [GPS](#gps) * [GPS](#gps)
@ -33,7 +33,7 @@ The sonde is to be divided into six functional blocks, which are highlighted in
Reverse engineering is complicated by the fact that the circuit board has four layers. Reverse engineering is complicated by the fact that the circuit board has four layers.
# Power supply # Powersupply
![Power Supply](__used_asset__/supply_sch.png?raw=true "Power Supply") ![Power Supply](__used_asset__/supply_sch.png?raw=true "Power Supply")
The power supply can be divided into three parts The power supply can be divided into three parts
@ -68,7 +68,7 @@ Finally, the battery voltage itself can also be evaluated by the MCU via the vol
The microcontroller is a [STM32F100C8](https://www.st.com/resource/en/datasheet/stm32f100c8.pdf) `U101` from ST in LQFP48 package, which gets its clock from the 24 MHz crystal `X101`. Apart from the fact that all IO pins are used, it is only worth mentioning that RC low pass filters are present at many outputs. The microcontroller is a [STM32F100C8](https://www.st.com/resource/en/datasheet/stm32f100c8.pdf) `U101` from ST in LQFP48 package, which gets its clock from the 24 MHz crystal `X101`. Apart from the fact that all IO pins are used, it is only worth mentioning that RC low pass filters are present at many outputs.
# Measuring frontend # Frontend
![Measuring frontend](__used_asset__/frontend_sch.png?raw=true "Measuring frontend") ![Measuring frontend](__used_asset__/frontend_sch.png?raw=true "Measuring frontend")
## Circuit arrangement ## Circuit arrangement