#Training Camp# Handheld Oscilloscope

I. Brief
 
        Introduction An oscilloscope is an important testing tool in the field of electronic measurement, capable of displaying the waveform of electrical signals in real time. Traditional oscilloscopes are usually expensive, bulky, and inconvenient to carry and use in daily life. To solve this problem, we have developed a simplified oscilloscope based on the STM32 microcontroller, aiming to provide users with a low-cost, portable, and easy-to-operate signal waveform display solution.
 
II. Hardware Components
 
        The core hardware of the oscilloscope is the measurement of the ADC input signal. The microcontroller processes this ADC input signal at high speed and plots it. Secondly, it performs frequency detection. Here, the LM393DR comparator frequency measurement circuit is used, comparing the ADC input signal with the input signal through a hysteresis comparator to achieve the frequency measurement function.
 
 
III. Software Components
 
        Hardware is essential, but software is equally important for the oscilloscope's functionality. Let's look at the software components.
 
Fourth, let's record some mistakes:
    1. First, the diode selection: the wrong package was chosen. I didn't want to buy the component, so I used jumper wires to fix it. The correct package is SOD-323_L1.8
 
    . 2. The GND loop wire in the PCB layout is too thin, which can easily lead to insufficient current or overheating. The wire should be thickened.
 
    3. The heating platform + solder paste is really prone to cold solder joints!! Cold solder joints!! Cold solder joints!! After soldering, check it. You can use a soldering iron to touch up the solder
 
. Fifth, finally, let's show the finished product!!
 
 
 
 
 
 
 
Sixth, then a video demonstration.