Products > Test Equipment
New miniature programmable DC power supply - FNIRSI DPS-150
Aldo22:
@ptluis: Thank you!
OK, I've plugged in the soldering iron. ;)
What do you think of this construction? (Attached picture)
Since I have a probe adapter, I thought it would be easier this way.
What scope settings are you measuring at?
Sec/Div, BW Limiter, Acquire Method etc...
ptluis:
--- Quote from: Aldo22 on September 26, 2024, 03:52:33 pm ---@ptluis: Thank you!
OK, I've plugged in the soldering iron. ;)
What do you think of this construction? (Attached picture)
Since I have a probe adapter, I thought it would be easier this way.
What scope settings are you measuring at?
Sec/Div, BW Limiter, Acquire Method etc...
--- End quote ---
Don't forget to split the cable and twist the wires, don't leave them parallel to each other. Certify that insulation is in good condition to avoid shorts.
Normally I press Auto, manual only to zoom in the results or in case Auto fails to show proper results
AC coupling
Edit: if you get to much noise try the spring approach
Aldo22:
--- Quote from: ptluis on September 26, 2024, 04:11:26 pm ---Don't forget to split the cable and twist the wires, don't leave them parallel to each other. Certify that insulation is in good condition to avoid shorts.
Normally I press Auto, manual only to zoom in the results or in case Auto fails to show proper results
AC coupling
Edit: if you get to much noise try the spring approach
--- End quote ---
OK, I forgot to twist the wires. It's done now. :-+
It may depend on the scope, but for me “Auto” simply sets DC to show the 12V. But I need AC with 5mV or 2mV/div
It does make a difference whether I set “Peak Detect” or “Average” etc. on the scope. Also the Sec/Div.
In the attached pictures you can see my self-made PSU above and the (noisy) PDS-3010G below, both without load @12V.
Settings: AC | Peak Detect | No BW-Limitation | 200us/Div | 5mV/Div.
ptluis:
--- Quote from: Aldo22 on September 26, 2024, 04:42:00 pm ---
--- Quote from: ptluis on September 26, 2024, 04:11:26 pm ---Don't forget to split the cable and twist the wires, don't leave them parallel to each other. Certify that insulation is in good condition to avoid shorts.
Normally I press Auto, manual only to zoom in the results or in case Auto fails to show proper results
AC coupling
Edit: if you get to much noise try the spring approach
--- End quote ---
OK, I forgot to twist the wires. It's done now. :-+
It may depend on the scope, but for me “Auto” simply sets DC to show the 12V. But I need AC with 5mV or 2mV/div
It does make a difference whether I set “Peak Detect” or “Average” etc. on the scope. Also the Sec/Div.
In the attached pictures you can see my self-made PSU above and the (noisy) PDS-3010G below, both without load @12V.
Settings: AC | Peak Detect | No BW-Limitation | 200us/Div | 5mV/Div.
--- End quote ---
As you can see with the 2 capacitors and the twist cable approach you got cleaner results.
Did you tried RISE instead of peak detect? I think rise will be better for manual trigger fine tuning and to analyze ripple I don't know if your scope allows manual setting 1mV/div or lower so that you get a better view of the results, but of course the lower you go the more you amplify external contamination.
Btw from my understanding peak detect will be better to analyze switching spikes and not so good for ripple, the experts correct me if I'm wrong.
Aldo22:
--- Quote from: ptluis on September 26, 2024, 08:47:58 pm ---Did you tried RISE instead of peak detect?
--- End quote ---
Hi
I don't know what RISE is.
My cheap scope has the acq. modes: Normal - Hi-Res - Peak - Average.
Thank you.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version