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Too Tight 'JST-RCY' Connectors
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 Posted: Sun Jun 16th, 2019 02:37 am
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Tony Walsham
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Some pictures would be nice.



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 Posted: Sun Jun 16th, 2019 02:48 am
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Rick Dow
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I know.

That was unfortunately a very long post

Still haven't got around to mastering how to post photos.

Rick




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 Posted: Tue Jul 9th, 2019 01:32 am
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Hal Pridgen
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Some of you seem to like the Pololu boosters,
to ensure a steady voltage to the engine,
so I got me some. 

They come with some right angle header pins,
and the solder points are spaced the same as the JST connector on my batteries.
Sooo... I made a connector out of that little board. 

This would not have done me any good on the little blue engine,
on which I carved out a spot for the connector,
but for my third conversion it works just fine.

It's not as smooth as I would like,
but it disconnects without too much tugging. 

The JST plug on my batteries will only go on one way,
so the polarization issue is taken care of. 

I put a piece of heat shrink on the little board,
to protect its stuff on the other side.







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Crepe Myrtle Garden Railroad
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 Posted: Tue Jul 9th, 2019 02:50 am
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Rod Hutchinson
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Very clever







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 Posted: Tue Jul 9th, 2019 07:40 am
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davecttr
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Neat, I must try that idea



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 Posted: Thu Aug 22nd, 2019 10:14 pm
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Hal Pridgen
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So I was reading a separate post by Tom Harbin, and it clicked:

I actually need a third wire to connect the “L” pad and "Volts In" on the Pololu chip, don’t I?

I think I’ll get rid of the Pololu voltage-regulator and just let the DelTang chip do the thinking.  :dope:




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 Posted: Thu Aug 22nd, 2019 11:38 pm
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davecttr
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Hal Pridgen wrote:
So I was reading a separate post by Tom Harbin, and it clicked:

I actually need a third wire to connect the “L” pad and "Volts In" on the Pololu chip, don’t I?

I think I’ll get rid of the Pololu voltage-regulator and just let the DelTang chip do the thinking.  :dope:


If you are using the Pololu regulator to boost the voltage from your battery,
you need that wire from the 'L' pad to the VIN of the Pololu.

If you don't have that connection the Rx will be monitoring the voltage of the VOUT,
which stays at, say a constant 9V, until your 3.7V battery is completely ruined.

Connect the 'L' pad to the VIN,
and the Rx will monitor the voltage of the battery, before it is boosted.




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 Posted: Thu Aug 22nd, 2019 11:44 pm
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Rod Hutchinson
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As Dave says,

It is the method by which you communicate to the DelTang Rx,
that your battery is 1S, and not something larger.

Simple to do, and a must do, to protect the battery.




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Rod Hutchinson
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 Posted: Mon Aug 26th, 2019 05:47 pm
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Bob R
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I use two cell batteries on almost all of my installations. 

I also equip each battery with a battery protection circuit,
which cuts the battery off when the voltage is at the low cutoff point,
usually about 3.4v per cell. 

I have not seen a need to utilize the L pad wiring.

When using a single cell the Pololu regulator has a minimum voltage of 3 volts,
which also cuts off the circuit at that point.
 
I have not encountered any problems in a few years of operations,
involving hours of use weekly.




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 Posted: Mon Aug 26th, 2019 07:28 pm
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Hal Pridgen
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I use 2S batteries as well,
and was quite happy with the locos performance,
before I added the 9V regulator.

I guess I got caught up in the gadgetry.




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