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Author Topic: What are these???  (Read 5822 times)

Klunk

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What are these???
« on: February 19, 2010, 04:41:12 PM »

I inherited these with a 20 year old kit, I know they are speed controllers and hazard a guess at them being action, but that is as far as I can go. A number would be good or even better some info/instructions on them
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HS93 (RIP)

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Re: What are these???
« Reply #1 on: February 19, 2010, 06:22:13 PM »

Action prob it look like the material Craig's boards where made from if not a maplins speed controller .

peter
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FullLeatherJacket

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Re: What are these???
« Reply #2 on: February 19, 2010, 06:36:14 PM »

They certainly do look like ACTion units, but the components have been soldered on the wrong side of the PCB and those heat-sinks look distinctly non-standard. Does the PCB have a 'P' number ec
etched into the copper?
FLJ
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Klunk

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Re: What are these???
« Reply #3 on: February 19, 2010, 06:48:01 PM »

no p on the pcb!!
attached a pic of the back
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Tug-Kenny

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Re: What are these???
« Reply #4 on: February 19, 2010, 06:54:17 PM »


Have you tried it ?

What is the number on top of the chip please.

Quite a complex circuit with a double sided printed circuit board.

ken

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Klunk

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Re: What are these???
« Reply #5 on: February 19, 2010, 07:00:30 PM »

chip number is gps zn409ce 9636
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Klunk

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Re: What are these???
« Reply #6 on: February 19, 2010, 07:01:55 PM »

there are 2 items that can be adjusted the potentiometer and the beige oblong, this hasspectral 2cw on it if that helps
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John W E

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Re: What are these???
« Reply #7 on: February 19, 2010, 07:03:45 PM »

hi there

Try an 'old' Hunter system ? - I would say 80% sure it may be possibly a 'forward' only speed controller, unless they are using a power transistor to switch from forward to reverse.  The other thing I would mention - you only have what appears to be 2xwires for input from the battery.  It looks as though there are 2 crimp terminals on the heat sinks.

The only transistors which I have come across which use the case as an electrical terminal are the old TO66 style (oval styled metal transistor) with 2 legs sticking out and definitely doesnt look as though he is using them.

Possibly a high current switcher.

aye
john e
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John W E

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Re: What are these???
« Reply #8 on: February 19, 2010, 07:46:55 PM »

hi ya there, In addition to my above post, I have just been reading through some of my electrical circuit books to see if I can identify the circuit.   There is only one circuit which I can see - it actually uses a power transistor where the heat sink is used as a connection rather than the (DRAIN OUTPUT Pin) or the collector pin.

so, I think it has been built to take some current  :-))

Makes me think more of a one way speed controller.

The two pots - one could be for dead band setting up and the other could be top end speed.

aye
john
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wombat

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Re: What are these???
« Reply #9 on: February 19, 2010, 07:57:18 PM »

I reckon it is a speed controller - the ZN409 is the give away for me.

Built sometime after the middle of 1996 - the zn409 was manufactured week 36 of 1996.

I think it is a reversing controller - there are four output transistors that seem to be in a bridge arrangement with the motor connections on the heatsinks.

Not necessarily a high power controller - the transistors back then were not as efficient as now. Much more heatsinking for the same output needed.

Wom
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Klunk

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Re: What are these???
« Reply #10 on: February 19, 2010, 08:02:04 PM »

This came out of a fleetscale graf spee running 2 buhler 777 motors off a 12v 5amp battery
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John W E

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Re: What are these???
« Reply #11 on: February 19, 2010, 08:11:16 PM »

Wom can i borrow your glasses  :-)) :embarrassed: :embarrassed: i can see it now  O0

bloobs
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Corposant

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Re: What are these???
« Reply #12 on: February 20, 2010, 09:49:38 AM »

Not Maplin:





Mike
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malcolmfrary

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Re: What are these???
« Reply #13 on: February 20, 2010, 11:30:31 AM »

Any chance of a look at the numbers on the power transistors?  This should give a good guess at its capabilities.
One of the pots will select to centre off, the other will adjust the deadband and determine the point at which max speed is reached.
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Circlip

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Re: What are these???
« Reply #14 on: February 20, 2010, 12:44:00 PM »

Is it one of Vikings??  Terry Platt design?

  Regards  Ian.
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Klunk

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Re: What are these???
« Reply #15 on: February 20, 2010, 05:26:31 PM »

if im looking at the correct bit numbers are
buz21 sc720 and
buk 553 608 phn-9625
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Klunk

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Re: What are these???
« Reply #16 on: February 20, 2010, 05:29:39 PM »

potentiometer 47k523
beige thing43p102 1k-k 9732
blue thing 9724 63v mkt-h0  370-ph 100n k
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malcolmfrary

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Re: What are these???
« Reply #17 on: February 20, 2010, 08:08:39 PM »

BUZ21 data Power MOSFET, 100V, TO-220, RDSon=0.085 Ohm, 21A, LL
BUK553-60B - PowerMOS transistor Logic level FET  The Amp rating is 60A
Both the current ratings are from the data sheets and assume almost infinite heatsinking - the actual controller, with its fairly limited heatsink, should be OK for about 10A max, 5A running.
Hopefully someone with more familiarity with FETs can venture a more informed opinion (when I did electronics at tech, transistors were considered a passing fad by most teachers)
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