Any recommendations for a good cheap USB oscilloscope?

  • Thread starter Thread starter sophiecentaur
  • Start date Start date
  • Tags Tags
    Oscilloscope Usb
Click For Summary
SUMMARY

The discussion centers on recommendations for affordable USB oscilloscopes, particularly the Hantek HT6022BC20MHZ, which has received mixed reviews due to poor software performance. Users express concerns about its reliability for capturing transient voltage spikes that can damage LEDs. Alternatives such as the Xprotolab Plain and DSO138 DIY are suggested, with emphasis on the need for a device that can log peak voltage events rather than just display waveforms. The conversation highlights the importance of selecting the right tool for monitoring electrical anomalies.

PREREQUISITES
  • Understanding of USB oscilloscope specifications and features
  • Familiarity with voltage spike phenomena and their impact on electronics
  • Knowledge of data logging techniques using Arduino or Raspberry Pi
  • Basic electronics skills for assembling DIY oscilloscope kits
NEXT STEPS
  • Research the Xprotolab Plain oscilloscope and its capabilities
  • Explore DSO138 DIY oscilloscope assembly and usage
  • Investigate Arduino or Raspberry Pi projects for power quality monitoring
  • Learn about surge protection methods for LED circuits
USEFUL FOR

Electronics hobbyists, engineers monitoring electrical systems, and anyone interested in low-cost solutions for capturing voltage spikes and protecting sensitive devices.

  • #31
jim hardy said:
Be careful with those isolation transformers. If you unplug them at an unlucky point in the sinewave they'll make a transient that could be hard on your 'scope input... remove scope probe first.
that Amazon scope seem to have max input of 100 volts peak.

old jim

Good point. Thinking back, I don't think I unplugged or switched off the transformer while it was connected to the scope, I only switched the light or fan in the power strip.
 
Engineering news on Phys.org
  • #32
  • #33
Just a note: A 10X 'scope probe has a 9MegOhm resistor in it to make a 10x divider with the 1Meg 'scope input.

Sound cards often have an input impedance around 47k making a 10x 'scope probe a 192x divider. And you could always add a resistor in parallel with the audio input to get whatever divider ratio you need.

Cheers,
Tom
 
  • Like
Likes   Reactions: dlgoff

Similar threads

  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 12 ·
Replies
12
Views
14K
  • · Replies 36 ·
2
Replies
36
Views
4K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
2
Views
2K