This smartwatch can measure linear acceleration, rotational speed, heart rate and SpO2 (oxygen saturation) of the hand
The 30v voltmeter made with PIC16f676 includes schematic diagram and source program.
Foreign powerful, simple and portable oscilloscope design (schematic diagram, PCB, program source code, etc.)
A good source code for stm32f4 oscilloscope, which can use 3-channel ADC to measure waveforms and display the waveforms on the screen and also display the amplitude.
Realizing network communication using limited resources on 51 microcontroller platform
jlink-v9.5 schematic diagram, you can directly learn the JLINK principle