Re: Bally Solenoid Driver Test Board

Load wise, you are correct, this is why the factory Bally solenoid driver
tester has a full complement of actual coils to energize. I suppose a
resistive "simulation" would be adequate, but you are also talking about
coils, which are inductive loads.

Chris

"Steve Kulpa" <stevekulpa@xxxxxxxxx> wrote in message
news:d5e23069-e3fc-4a38-a887-e49df4d34fbc@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I don't know what or how you're designing this device, but please keep
in mind to properly test a solenoid circuit, and a lamp circuit for
that matter, you need to apply a load that's considered normal for the
circuit. My first bench tester simply used LEDs with a current
limiting resistor, which worked fine, or so I thought. I had a lamp
driver once that did not work 100% in my machine, but tested perfect
on my bench. I then realized that the SCR was working, but was weak
and under a normal load would fail. I assume the same could happen w/
the driver transistors, so now my test bench has testers with the
proper load applied to each circuit to help weed out those pesky so-so
drivers.

just my thoughts,
steve
---
Steve Kulpa (cargpb10)
Hermitage, TN
http://www.geocities.com/stevekulpa/pinball.htm - Pinball
http://www.geocities.com/stevekulpa/faces/rgpidx.htm - Faces


On Oct 2, 11:04 am, kenny_ii <kenny_...@xxxxxxxxx> wrote:

As Pinpoint Electronics, I am in the process of testing a similar
board right now. I designed it to operate like the Bally tester, but
without a lot of the complicated circuitry. I'm planning on offering
it as a kit, to keep the cost down and allow the user the option of
enclosures, indicators, etc. I will post again when testing is
complete.

K2 / Tim


.

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