LEGO SYSTEM Trains : 27867


Trains / 27867	27866 \| 27868

Subject:	Re: IR train base alternative
Newsgroups:	lugnet.trains, lugnet.parts.custom, lugnet.parts.mod
Date:	Tue, 26 Sep 2006 00:12:06 GMT
Viewed:	15432 times

In lugnet.trains, Will Chapman wrote:

In lugnet.trains, Ondrew Hartigan wrote:

To start I disassembled the train base by taking out the 8 extremely tight screws I then removed the circuit board and soldered on a diode bridge (bridge rectifier) in place of the 2 tin battery pack leads. Now basically what this means is no matter what the polarity is going into the IR unit, the voltage going into the circuit board remains the same. This protects the circuit board and makes it idiot friendly. =).

Ondrew, how did you handle the voltage drop through the bridge rectifier? Did you measure any top-speed dropout?

Curious, ---Will

i never really tested it to see what the drop was. i can’t imagine it was much though. ondrew

Message has 1 Reply:

		Re: IR train base alternative
(...) Actually a typical bridge rectifier will drop ~1.4 volts in the supply. That's alot! About a 16% drop in voltage, and a 29% drop in overall power at the top end. I'm not sure what effect this would have on the control circuitry. Mat (18 years ago, 27-Sep-06, to lugnet.trains, lugnet.parts.custom, lugnet.parts.mod, FTX)

Message is in Reply To:

		Re: IR train base alternative
(...) Ondrew, how did you handle the voltage drop through the bridge rectifier? Did you measure any top-speed dropout? Curious, ---Will (18 years ago, 25-Sep-06, to lugnet.trains, lugnet.parts.custom, lugnet.parts.mod, FTX)

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