DIY Oscilloscope
Plan
Plan
I soldered a hand-held, digital oscilloscope.
Design
Design
(Schematic from kit)
Materials
Materials
- Power Supply (9V battery and connector or plug)
- Kuman Digital Oscilloscope Kit (https://www.ebay.com/i/253789249229?chn=ps)
- Solder
Tools
Tools
- Soldering Iron
- Solder Sucker (optional)
- Microscope (optional)
- Wire Cutters
Safety Tools
Safety Tools
- Hair band
- Goggles
- Gloves (optional)
Workflow
Workflow
- Gather materials.
- Organize circuit components (ex. resistors, capacitors, etc.)
- Put on safety gear.
- Follow the user manual, when deciding what order to solder the components. (resistors>chokes>diodes>crystal>USB socket>tact switches>ceramic capacitors>LED>pin header-omit->transistors>regulators>capacitor trimmers>power inductor>electronic capacitors>power connector>pin headers>slide switches>BNC connector>signal ring>LCD board!)
- To short the JP3 and JP4, make a solder bridge between the two solder dots.
- Trim all the excess wire from the back of the board
- Check the voltage of the 9V battery before attaching it to the circuit.
- Check the voltage of the circuit (connected to a 9V battery) before attaching the LCD screen. It should be around 3V.
- Attach screen and wait for device to turn on.
- Watch this video to understand the functions of the oscilloscope. (https://youtu.be/rGYiJdSWL7w )
IMG_1341.MOVProblems/Troubleshooting
Problems/Troubleshooting
- Check power supply.
- Check solder conenctions with microscope.
- Check to see if LED will blink if you press the reset button.
- Use the solder sucker to remove bad solder connections and resolder.
- Check to see if JP3 and JP4 are shorted.
- Check for fake board (check model numbers, etc.)
- Email customer service.
Soldering with Microscope
Soldering with Microscope
Solder Sucker
Solder Sucker
IMG_1353.MOVFinal Product
Final Product
Conclusion
Conclusion
This oscilloscopes activity gave me a better understanding of oscilloscopes and the voltage, current, resistance capabilities it has. It also allowed me to work on my soldering skills. Especially with these smaller components, I had to be careful with my soldering job. I found a lot of my errors had to do with a lack of connection or a solder bridge. I'm happy we were able to make these oscilloscopes, because I used the technology when I was younger, but now I have progressed to making my own!