The Modular Bench Power Supply ++, Putting it all together, the bare bones

4 Dec 2014

I will be putting together the video this week end to go with this schematic but I thought i would share this with you in the mean time

VCC can be as much as 40V (I was powering the test circuit on a breadboard with a bench PSU for now set to 30V, my psu max)

In the video I will be reviewing the behaviour of this circuit as well as Identifying a few pitfalls (Nothing serious and probably acceptable for a basic PSU but we do want to evaluate where we can improve on things

If you think you know the potential issues, please post and we will compare notes at the weekend (There are two primary ones)

Here is the video that describes and goes through some basic tests of this circuit

Enjoy, again, a little detailed so its is about an hour long

I will be adding notes etc in the next few days

Parents

Former Member over 10 years ago

Hi
I built this on a bread board seems very good need to add a meter to it
what is the number of the Vishay four wire sense resistor that you used I cant find it I used a 1% .100ohm 5 watt sense resistor ,seems ok
Garry
- Cancel
- Vote Up 0 Vote Down
- Sign in to reply
- More
- Cancel
Robert Peter Oakes over 10 years ago in reply to Former Member

What is important about the sense resistor is the ability to know its value and that it is stable

a .1ohm 5W is perfect, you say it is a sense resistor, do you mean it is 4 terminal ? (Kelvin Connections)

the ones I have are Visha Bulk Metal
VPG - Foil Resistors - FPR 4-T220 T2211
and
VPG - Foil Resistors - FHR 4-3825 to 4618

My power sense FPR is also 1% but I can measure it to better than that and as it is very stable it will remain accurate with the measured value
- Cancel
- Vote Up 0 Vote Down
- Sign in to reply
- More
- Cancel
Former Member over 10 years ago in reply to Robert Peter Oakes

I could not see the Vishay four terminal one at farnell , I did not have the number at the time
so I bought this one , MULTICOMP MC14721 Through Hole Current Sense Resistor, MC Series, 0.1 ohm, 5 W, ± 1%, Axial Leaded, Wirewound
it does the job

garry
- Cancel
- Vote Up 0 Vote Down
- Sign in to reply
- More
- Cancel

Comment

Former Member over 10 years ago in reply to Robert Peter Oakes

I could not see the Vishay four terminal one at farnell , I did not have the number at the time
so I bought this one , MULTICOMP MC14721 Through Hole Current Sense Resistor, MC Series, 0.1 ohm, 5 W, ± 1%, Axial Leaded, Wirewound
it does the job

garry
- Cancel
- Vote Up 0 Vote Down
- Sign in to reply
- More
- Cancel

Children

No Data