Hi I recently bought one of these:
https://www.aliexpress.us/item/2255801148821043.html
I am trying to establish if it works or not, but without a motor. Is that possible?
I have looked at the output with a meter and with a simple oscilloscope. There are a few ripples when it is turned on and then it goes to 0V flat.
How I connected it:
Power inputs connected to ground and 12v.
Each of the 3 output lines connected to ground by a 10kohm resistor because the directions say it must run with a load.
Meter and oscilloscope connected to ground and to one of the output lines.
Slowly swept the speed knob from 'off' to max.
Tried all 3 outputs, zip.
If this testing is good enough, then I will return it to the seller as broken. But am I testing it right?
Thanks,
John
https://www.aliexpress.us/item/2255801148821043.html
I am trying to establish if it works or not, but without a motor. Is that possible?
I have looked at the output with a meter and with a simple oscilloscope. There are a few ripples when it is turned on and then it goes to 0V flat.
How I connected it:
Power inputs connected to ground and 12v.
Each of the 3 output lines connected to ground by a 10kohm resistor because the directions say it must run with a load.
Meter and oscilloscope connected to ground and to one of the output lines.
Slowly swept the speed knob from 'off' to max.
Tried all 3 outputs, zip.
If this testing is good enough, then I will return it to the seller as broken. But am I testing it right?
Thanks,
John