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 Posted: Thu Apr 13th, 2017 10:08 pm
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Bob R
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Michael,  Sounds like you are making progress.  RC is great.  I am very happy that I have gone in that direction.  For layouts with a small number of engines it can't be beat.  If you aspire to have dozens of engines battery management becomes an issue.  My layout is set uo for 3 operators and I have 6 engines operating on it.  Battery management is not a problem at all.  Once you are hooked and if size becomes an issue I would definately recommend DelTang RC gear.  It is very reasonable in price and easy to install.  Pretty much fool proof.  
Bob

Attachment: DelTang.JPG (Downloaded 45 times)



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 Posted: Fri Apr 14th, 2017 03:03 am
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Michael M
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So far I feel like I'm making good progress.  Much less frustration than my first try with that little Coke can car.  I plan on replacing that large battery pack with a 7.4 volt LiPo.  I haven't found a 7.4 volt that will fit the available space in my critter, but I did find 2 small (tiny?) 3.7 volt LiPo s that would do nicely.  Wiring them up in series would still give me 7.4 volts.



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Michael
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Nye, Inyo & Esmeralda Railroad
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 Posted: Fri Apr 14th, 2017 05:16 am
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Michael M
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Success!!!  Well, pretty much so.  Got the R/C car gutted and everything hooked up to my critter.  It works!!!  One little problem though, the battery pack is just too heavy for my little critter to haul.  Ordering two 3.7 LiPo batteries (wired in series) to replace this bulky battery pack that came with the car.







Have to make some modifications to my critter.  Going to cut a side hatch on the back end with a lift-up aluminum panel so have access to the on/off switch and recharge cable.

Okay, the car cost about $25.00, plus two 3.7 LiPo batteries at $10.00 for both, add in a couple of JST connectors and my total cost is less than $40.00.  For those running DCC a decent decoder will run you at least that much or more. 

Colored me hooked on R/C.



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 Posted: Fri Apr 14th, 2017 08:59 am
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1104th Post
Si.
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Hi Michael :wave:


SOOOPER COOL ! :cool: that the circuit board is pretty small !! :bg:


Looking at it as well, it seems that it could even be possible for an intrepid hacksawer...

...to chop quite a bit orf, and remount the crystal, provided there are no SMD parts on the PCB.

Nice ! :P


HOLLY SUPERCHARGERS Boy Wonder ! ... The batteries are nearly as big as a Sinclair C5. ;)

Looks like 6x 1.2 Volt AA tagged NiCads. maybe, from the look-see in the photo. L:

Quite heavy for sure, especially now there aint no lead in the critter, for traction.

You could easily run the critter on some pretty small batteries though.

Those lead-booted R.C. car boffins are all PEDAL TO THE METAL !! :w:





A more sedate pace in the Owens Valley, won't need THAT kinda juice ! :shocked:



:pimp: :pimp: :pimp: :pimp: :pimp: ... PIMP MY PLYMOUTH !!


I gotta find me a donor car. ???

I recon I can R.C. my Model-Power Plymouth for 15-Quid, all in ! :thumb:

I totally HATE spending big bucks on mooodern microchips...

...I don't mind forking out some wedge for decent vacuum-tubes & ex Soviet Military hardware on eBay though ! ;)

Those MiG-29 jet-fighter avionics components I bought from the dodgy Bulgarian...





...sound AWESOME in my stereo ! :!:


TOP GUN !

.  .  .  RRIIGGHHTT  IINN  TTOO  TTHHEE  DDAANNGGEERR  ZZOONNEE  .  .  .


I'm a BIG Kenny Loggins fan ! :bow:


L  a  t  e  r  .  .  .


Si. :)




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 Posted: Fri Apr 14th, 2017 02:07 pm
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Bob R
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I take pride in the being cheap group also.
With a little imagination you can find solutions switch placement, charge jack placement etc.
On my small critters I made the roof removeable with the battery in the roof.  I have a spare roof (and therefore battery) for each.  When one runs down I change roof which takes about 10 seconds and place the other on the charger.  The roof contacts are the electrical ontacts for the battery so no switch or charge jack is needed.  
This meant when a critter was not in use the roof had to be removed.  I later decided that I wanted to keep roofs on when not operating so I incorporated a simple switch.  Two short peices of brass tubing with a peice of piano wire to pass through completing the connection. Cost? about two cents.  With a little thought the piano wire can be disguised by a detail on the engine.
Bob


Attachment: 20170414_084703_resized.jpg (Downloaded 33 times)



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 Posted: Fri Apr 14th, 2017 02:21 pm
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Bob R
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The two posts for the roof are the battery to critter contacts.  There are two peices of brass tube on the critter as receptacles.   On the bottom you can see where the two wires connect the receptacles to the voltage regulator which boosts the 1S 3.7 volt lipo to 9 volts.  Two wires from the voltage booster to the DelTang RX60 receiver ( in white paper wrap) and two wires from it to the motor.  This critter has been in continuous use for over three years.  An inexpensive Bachmann HO GE44 ton power truck which was about $15 from Bachmann online parts store.
Bob

Attachment: Critter bottom.jpg (Downloaded 33 times)

Last edited on Fri Apr 14th, 2017 02:22 pm by Bob R



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 Posted: Fri Apr 14th, 2017 04:16 pm
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davecttr
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That critter is nice Bob. I like the brass tube idea as a simple switch. As usual my latest project really needs a switch and I will try that. Another possibility is a simple inline jumper like Deltang used for the Prog3



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 Posted: Fri Apr 14th, 2017 06:44 pm
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Michael M
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Bob,

I like the way you rigged up the battery in the roof.  Maybe down the road I'll give your way a try.  Right now I just wanted a 'win' with installing R/C.  Already have LiPo batteries on order to replace that large 7.2 volt battery pack.



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 Posted: Fri Apr 14th, 2017 07:03 pm
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W C Greene
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1:35n2 Porter (nothin' but an upscaled On30 Bachmann) side view, wires under cab roof shown.


This view shows the receiver under the cab roof, the on/off switch there also, and the 2 cell 7.4 volt Li Poly on the left (fireman's side). When the board, etc. are painted black and the wires moved around, the "stuff" is barely noticeable.
IT CAN BE DONE! I get a couple of hours per charge with this 600 MAH battery.

Woodie



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 Posted: Fri Apr 14th, 2017 11:38 pm
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Si.
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Hi Bob :wave:


I'm guessing your DC-DC converter board isn't a mega expensive R.C. product...

...& maybe you get these for a couple o' bucks on eBay ?


I figure you have looked into using the smallest/best for your small locos...

...if it is from eBay, do you have a link to the product you use ?


I would like to get one to try, if I can afford it.


Cheers.


:moose:


Si.



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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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