Electronics > Beginners

Manson DPD-3030 PS - modifications possible?

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MarvinTheMartian:

--- Quote from: Shock on March 21, 2016, 02:46:02 am ---... I suspect there is a far easier way to do it, something I will do on Manson before I attempt the brute force solution...

--- End quote ---

Thanks for helping out Shock.

If you find the 'easier way' before I get to my modification on the Manson could you let me know?

Many thanks.

PS Do you have a service manual/schematic for the Manson?

Shock:

--- Quote from: MarvinTheMartian on March 21, 2016, 04:38:11 am ---
--- Quote from: Shock on March 21, 2016, 02:46:02 am ---... I suspect there is a far easier way to do it, something I will do on Manson before I attempt the brute force solution...

--- End quote ---

Thanks for helping out Shock.
If you find the 'easier way' before I get to my modification on the Manson could you let me know?
Many thanks.
PS Do you have a service manual/schematic for the Manson?

--- End quote ---

Well not had time to look inside in any detail but I'll share my other idea for a hack. Put in an external output and shorting switch. Either break out the output to a switch box or inline cable switch.

Or even...

Drill 3 holes in a prototyping PCB (or make a PCB) the size of the outer thread on the 3 output (pos/neg/earth) banana sockets. Mount the switch to the PCB and one extra banana socket for the switched output. Attach the PCB so now you have all 3 connections as pass through straight out but one can be switch controlled if you wish. You would need to generously add solder to the used PCB traces to allow decent current flow between any connections.

Using a 3 way rocker you could have a short output position (to set current), you could also by adding more circuitry and a double throw switch make a CR2032 powered circuit to give switch status indication.

MarvinTheMartian:
Interesting idea, hadn't considered that. You wouldn't have to make any internal changes at all then.  :clap:

Though I think i would still like to have it all built into the unit, but well worth considering if it turns out to be too messy or impractical to do so.  :-\

I've got to go inside in any case to change the pots to 5 turn ones - I'll make a decision then on which way to go.

Thanks Shock.  :D

beanflying:
Bump, it's mod time  8)

Not sure if either of you got around to modding your own?

Just got this wee beasty to go with my 15V 0-60A Manson (does this make me the Manson family  :o)

Still had the original stickers from when it was brought on top so very very clean. Did a little quick testing on the outputs regarding shorting switches for the front.

In Parallel mode only the Master Current set works to set both sides evenly. It doesn't care if it is master or slave shorted still only works on master.

In normal mode Mmmm well it operates "Normally"

In Series mode both Master and Slave can and should be set independently as per normal mode.

So spring loaded toggles or maybe heavy pushbuttons for the job on either channel would be the simple answer. BUT

As I would like to add is independent Channel switching with a default to off when first powered up so some sort of Soft Latch FET based circuit should do it. This will prevent any startup transients or spikes getting to any projects. So I am thinking the elegant solution will be a small daughter board mounted on the chassis between the display and the next board back. The nice thing is then very small and tidy pushbuttons can be used instead of big clunkers.

5 or 10 Turn pots on Voltage are a bit of a must do when I get some too.

Off to look for switches and Pots  :-+

Shock:
Go for it, yeah show us the circuit you decide to use and parts list etc with photos. I have two of these now I picked up another a few weeks back.

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