EEVblog Electronics Community Forum

Electronics => Beginners => Topic started by: adras on August 10, 2019, 06:58:03 pm

Title: MSO5000 Signal generator question
Post by: adras on August 10, 2019, 06:58:03 pm

Hey,

As I want to play around with some 12V PWM fans, I need a 22khz signal to get them running. Luckily the MSO 5000 series has a 2 channel signal generator. But since a lot of things can go wrong when you're playing around with electronics I was afraid I could kill my precious Oscilloscope. The idea is simple, what if I accidentally hook up 12V+GND to the signal generator probe? Will it survive that?

Hope somebody can shed some light on this.

Title: Re: MSO5000 Signal generator question
Post by: ledtester on August 13, 2019, 06:57:06 pm

Some ideas:

- use an optocoupler to isolate your signal generator from your fan circuit; here's a discussion with a schematic:

https://forum.arduino.cc/index.php?topic=507639.0 (https://forum.arduino.cc/index.php?topic=507639.0)

- use a cheap microcontroller to generate the pwm signal
- get one of these:

https://www.aliexpress.com/item/32835541668.html (https://www.aliexpress.com/item/32835541668.html)

(search for "Signal Generator PWM Pulse Frequency Duty Cycle")