Great Chesterford Junction Part Two

Hi Gormo
Don't know if. au would work, the text would de upside down, we have enough trouble getting Toto to understand with out him standing on his head.

Servos work at a nominal 5V - perfect for arduinos, I will look up the MERG site for the controller specs, I have made one of the servo kits up, as intend to do the same migration in the future.
Of course you could just fit the point motor under the point, and use the broken adaptor plates as a base.
To fit, using a pin vice and 1mm drill, drill from above through the hole in the tie bar at both ends of thr throw. On the underside of the baseboard draw a line joining the holes but extending 25mm in either direction, this will help align the baseplate. As your underlay is so thick, I'd drill an 8mm hole in the centre between the original holes, stopping when you reach the underlay then use a scalpel to clear the rest.I used a dremel with a 3mm burr to cut a slot.Same method would work for installing servos as well.
Paul

 

Gormo,

I'm ducking ....... You have just opened the flood gates now. Don't say you weren't warned. You are about to be ducked in to the dark side.

Cheers

Toto

 

Hi Gormo

Not sure if you need to be a member to see the page, try and see

The link to the page is

http://merg.org.uk/merg_kitlocker/section.php?id=2

If you can get access, then you are looking for the servo4 - kit 75.
the "i" button is the instructions to build it, and the "tb" button is the technical bulletin explaining the theory and usage instructions.

Essentially you set the max and min throws of each servo using either the serial com port of a pc, or a stand alone Servoset 2 kit. Once set unless you need to replace the servo everything stays set.
There is also an alternative program chip that simulates signal bounce.

Cost £6.30 for the servo4, and £20 for the servoset2.

Paul

 

Just doing some crimbo shopping on amazon and found these

http://www.amazon.co.uk/gp/product/B00J593TY6?refRID=YPWPA08B0ZMF977DAMTG&ref_=pd_ys_c_rfy_560798_7

£15 for 10 servos, me thinks I may be converting sooner rather than later - don't panic Toto, not before the buildings are done.

Paul

 

Very Nice....Very Tasty......you`re planting seeds Paul me old mate

See Toto, the dark side will always find a way in....

Paul

 

Now for the 5V power supply

Several options, one of the easiest is an ATX PC power supply.

for examlpe

http://www.amazon.co.uk/gp/product/B00P2GE38C?keywords=atx%20psu&qid=1450616476&ref_=sr_1_7&sr=8-7

Product Description Quiet fan technology
24 pin (20+4 pin) ready; 4 pin 12V, 2 x Sata, 2 x 4 pin molex; 1 x floppy
Meets Intel v2.03 enhanced +12V
230V with rear on/off power down button
Over-voltage and current protection +3.3V;+5V;+12V
100% Burn in and hipot tested; short circuit protection
EMI Filter built in
For Intel, AMD and all backward compatible CPU's
White boxed
CE/ FCC/ UL approved
ROHS Compliant
+3.3V 26A; +5V 27A;+12V 22A; -12V 0.5A;+5VSB 2.0A

Various voltages available to use, just needs the power on wire connecting to common (use a switch as an off/on)



a 5V wall wart - watch the current rating

or rig up a psu from scratch, replace the 7812 with a 7805 for 5V out



This will work from an 16V ac out from a controller, e.g. H&M Duette, Gaugemaster, Hornby etc.

Paul

 

Attached files

 

Told you so.

 

So, tell me more about this electro-wizardry or as Toto calls it, the 'dark side'...

Cheers, Gary.

 

Actually, before Toto jumps in, I'm joking...!

Cheers, Gary.

 

Nice new toys Gormo. I like the Fodens.

Enjoy the family time.

All the best

Toto