[edited]Mankato and SN-voice current draw ?

[nutoniom]

Hello,

I found a lovely dual output +-15v psu at 150 mA and would like to know if I can power both my SN-voice and Mankato with it.

Scott mentions ''110 mA @ +15V, -100 mA @ -15V. '' in this thread : http://electro-music.com/event2008/forum/post-226286.html
for the SN-voice but i could'nt find anything for the mankato.
[EDIT]That is the current draw for the Appendage, sorry my bad. So i need to know for both the mankato and the Sn-voice.


I guess it would be a bit pushing it at 150 mA, but, a guy can dream

The psu is a Lambda LZD-23 and it's mounted on a McCurdy radio ltd. pcb that's very hackable.

thanks in advance for any help.[/quote]

[v-un-v]

The specs for the Mankato only come if you buy a PCB from Magic Smoke. The Mankato was never a project here on the forum. If you PM Tim Servo, I'm sure that he'll be happy to advise though.

[State Machine]

Well, for the SNV:

In an estimation, without actually measuring the current, the SN Voice current usage would be:

SN76477 10 mA worst case
(LF444 x 2) 1.6 mA (200 uA per amplifier x 8
CD4046 @ 10 kHz should be about 0.4 mA

That comes to 12 mA. factor in a small bit of other circuitry, and I would say worst case is probably 30 to 40 mA. That should be fairly close. I should really specify the REAL current draw in my documentation that comes with my board.

Now just take a peek at the Mankato schematic and tally up the current in a similar way to get a good "ball park" figure.

Is that 150 mA per side of your +/- 15 V supply or is that the total supply current?

Bill

[nutoniom]

Thanks for the info Bill! The ps reads:

dual regulated power supply
max. output +- 15V 150MA

So I guess it's total.

I'll look up the datasheet for the mankato IC's and do the addition (why i didn't think of that!)

thanks a lot

jf

[magman]

With a bit of luck and a following wind, I'll be finishing the construction of both a Mankato and an SN-Voice this weekend.

If they behave themselves, I'll let you know what the actual current consumption is for each of them.

Regards

Magman

[nutoniom]

That would be really nice of you, i'd do that myself but I'm still missing components to finish my builds.

thanks!

jf

[Tim Servo]

Hi Everybody,

Last time I checked, the Mankato draws about 40mA total (about 20mA from each rail). In theory, you should be okay with 150mA for a Mankie and an SN-Voice.

Tim (current events) Servo

[davebr]

I keep a spreadsheet of power supply consumption on my web site
http://modularsynthesis.com/modules/tips/tips.htm

My Mankato is stock and draws 35 mA from each supply rail.

Dave

[Tim Servo]

Awesome, thanks for the update Dave. Obviously my figures were a bit low. Very nice chart by the way.

Tim (figures never were my strong point) Servo