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Author Topic: Forney electronics  (Read 1161 times)
norman

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« on: March 06, 2010, 10:59:09 PM »

Dear Mr. Bachmann:

What is the electrical function of the circuit board in the new Forney?
Sure seems to be a lot of electronics there!

Thank you
Norman
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the Bach-man
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« Reply #1 on: March 07, 2010, 12:44:51 AM »

Dear Norman,
It eases the installation of a variety of control systems.
Have fun!
the Bach-man
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yeorail

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« Reply #2 on: June 29, 2010, 04:53:45 AM »

Hi Another problem seems to be that pin7 is used in the Forney whereas all the 21 pin chip don't have that pin - so where do we go for #plug & play Huh?
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StanAmes


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« Reply #3 on: July 05, 2010, 12:27:58 AM »

Norman

Perhaps I can expain the electronics.  They are actually rather simple.

The Forney is designed to operate well on DC, DCC, and RC systems.

Most of the electronics are for the LEDs.  The electrtonics are designed  to operate the LEDs well at very low voltages found in DC (such as the ability for the lights to go on before the locomotive moves) and to to allow the LEDs to operate well at DCC voltages (typically 20-24 volts).

Each LED is controled by a simple current regulation which requires several components per controlable LED.  Other componetnts regulate the current for the smoke unit and for the optos for the chuff.  One interesting side is that the smoke unit is turned on and off by a very small current load which allows the electonics forn in most DCC decoders to function normally.

Hope that Helps

Stan Ames
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