2$ DIY Low cost USB Oscilloscope
Were you going to buy a 100-1000$ valued USB oscilloscope? No need of that when you can make one at just 2$.
An Oscilloscope is a device which can analyze realtime voltage or pulse signals and plot their waveform graph in a display. It is also known as CRO, DSO or, an O-scope.
It helps us in analyzing circuit output signals and pulses. Normally it is used in microcontroller projects but it’s also useful in making Any kind of Oscillator for Inverters to check what the output frequency and waveform is.
Image courtesy: usboscilloscope.info
Wondering how is this possible?
Well, this will work with soundcard. Wait, I’m not talking to use your PC’s soundcard, as if I told so, the USB term shouldn’t have been mentioned. I’m asking you to buy a USB Soundcard. Nowadays they are very cheap.
Get at eBay.com from 0.99$
Get at eBay.in from 100 Rs
Why I am asking to buy a USB soundcard and not to use the PC’s internal soundcard?
Because, if you give high voltage or spikes to the input, it may burn and if it’s a USB sound card , it will cost 1-2$, but if you burn PC’s internal Audio system, replacing the motherboard will cost you 40$.
Well, there are many soundcard oscilloscope software, but I’d recommend you use Soundcard Oscilloscope or Zelscopeonly, because they provide good functional GUI and Soundcard Oscilloscope has signal generator too so that you can generate signals by the sound out port of USB sound card and analyze signals given to the MIC IN port of the USB soundcard.
Points to remember:
- USB sound card can handle +-1V i.e, 2V p-p . If you intend to give high voltage, use voltage divider.
- It can’t analyze DC signals and Ac signals<10Hz
- Use shielded wire and insulated probes.
Got some question or suggestion ? Just leave a comment, I’ll be happy to talk about it.