PSU

[Someone Electro]

They didnt close down completly.

Just for Africa.

Microchip also samples some other goodys like ADCs,DACs,Voltage regulators.Tempretature sensors,I2C and SPI EEPROMS(Up to 512Kbits),Batery chargers(Li-Ion,Ni-CD,Ni-MH),Motor drivers(Up to 2A)...

Chect just out there analog products.

You can order 4 difrent items and 3 each i think.

 

[bryan1]

BTW, is that a set of carbide drill bits that I see on the top shelf? :lol:

Sure is Zac I got them on e-bay for US $10 each so for a total of $44.00 Oz including postage I got meself 100 carbide drill bits from 0.35-1.15 mm in 0.05 increments. Off memory I got the link for them off this forum.

Cheers Bryan

 

[audioguru]

I know mine has current limiting. It didn't say short circuit protection, but I'm sure that it does.

Zach, yours has current regulation which is a form of very accurate limiting, but I can't think of an application for regulation.
If it is set to a low voltage or is shorted and set to 5A then it will dissipate 150W. If it doesn't have a high speed fan it will smoke and glow red-hot! Maybe it uses a tracking switching pre-regulator to stay cool.

It has "high current limited" protection, whatever that is. It should have High Temperature Protection instead.

 

[Someone Electro]

An Switchmode PSU wod solve that prblem esaly.

 

[audioguru]

A switchmode PSU has high frequency ripple, and doesn't regulate as well as a linear one.

A tracking switching pre-regulator followed by a linear regulator would be perfect. :lol:

 

[zachtheterrible]

Good god, I ordered this thing almost exactly 48 hours ago and received it in the mail today!! Talk about fast shipping. Well, it better be fast because I got stuck with $24 S&H. My oscilloscope took 2 weeks to get to me!

This PSU is great! What it means by current regulation is that I can set how much current I want it to supply, say 500mA. Then if I turn up the voltage, it will only let the voltage go up to a certain point so it only supplies 500mA.

Audio, I don't think I'm going to be needing to worry about heat, it has a massive heatsink mounted on the outside of the case in the back. If I have the current turned way up and the voltage low, that's when it will dissipate a lot of power and heat up?

Something very very strange is going on with my o-scope though. Even when the O-scope is not hooked up to anything, it's getting massive interference from the PSU. So much so that even the trace rotation got thrown off! What shall I do?

 

[Nigel Goodwin]

Something very very strange is going on with my o-scope though. Even when the O-scope is not hooked up to anything, it's getting massive interference from the PSU. So much so that even the trace rotation got thrown off! What shall I do?

Move the PSU further away from the scope! - the magnetic field from the transformer can deflect the beam magnetically - scope tubes are often screened against this (using mu metal screening), but it's probably only partially effective?.

 

[zachtheterrible]

Something very very strange is going on with my o-scope though. Even when the O-scope is not hooked up to anything, it's getting massive interference from the PSU. So much so that even the trace rotation got thrown off! What shall I do?

Mive the PSU further away from the scope! - the magnetic field from the transformer can deflect the beam magnetically - scope tubes are often screened against this (using mu metal screening), but it's probably only particlaly effective?.

Nigel I bet thats it, the PSU is sitting right on top of the scope :lol: