Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Minimalistic STM32F042 scope

In many cases oscilloscope is used to test low voltage and low frequency signals. This is what any low end oscilloscope is capable of. I think that proper oscilloscope should be on every hobbyists bench. But still there might be various reasons not to have. As quick fix to this problem might be a DIY solution. Tomeko have build really minimalistic scope project on STM32F042 ARM Cortex microcontroller. It accepts single channel, single voltage range signals and streams it to PC via USB FS with libusb as driver. Scope’s sampling frequency is 480kSps at 8-bit resolution. Signal is captured in real time Windows application which can record signal to file up to 512M samples. This is enough for simple measurements and monitoring. The great thing about this is that circuit… Continue reading

USB oscilloscope using STM32

This is a basic oscilloscope on STM32F103C8T6 microcontroller. Circuit board is kept very simple. No any fancy analog stuff – just diode protection circuit and resistors divider. It is a two channel 8-bit scope with 300kSps each. It accepts voltage levels from 0 to 6.6V. Data stream via USB is live and goes to PC GUI called miniscope v4.Here you have some basic controls including sampling rate, triggering source and level, buffer size and other handy stuff. Continue reading