In the new release of firmware for the TS100, I have moved the system from using a software-driven bit-bang of the output to hardware-based timers. The issue here is that we cannot just use normal PWM! Why can’t we just use normal PWM? Soldering Iron drive Schematic The above image shows a small extract from the TS100 schematics, with the PWM signal from the STM32. The soldering iron tip is driven by the back to back MOSFETs(Q1A/B)....
Most of my current projects are using the very, very nice stm32f103 series of chips, as these provide excellent performance per dollar cost. The embedded DMA in these chips is a massive help in getting a project up and running without any struggle for cpu power. I find the DMA documentation to be lacking at best with getting this system up and running using the new HAL drivers from STM. While this is actually quite an easy system to get up and running, I could not find any nice notes on how the system should be setup and things to be aware of....