has any one got a circuit digram for a easy to make controllers   

Here is some links

http://brian-lambert.co.uk/Electrical-2.htm#Train Control.

http://www.scottpages.net/ReviewOfControllers.html

http://home.cogeco.ca/~rpaisley4/Throttles.html#2

I will have a look at what I have as well over the weekend.

 

and I have a feeling that a couple of circuits are in threads in this forum as well.

I wonder why you'd want to build your own unless you just "want to" ………….:roll::roll:

Fairly decent DC controllers are as cheap as chips.;-)

the main reason is that i like building thing and that i can not find one cheap as i can afford  

It depends what you want to do with it Alex……

You can pick up a simple forward/reverse controller ex a split down train pack for around £15 including the transformer.  I doubt you'd buy the materials for that price ……………

Have you tried e-bay ? Ah, sorry, I realise you actually want to build one ………:thumbs  In that case, ignore my previous comments ……….:roll:

Ye I have 3 for my ngauge which are gaugemaster but I am interested in electronics so it time to make one

Here are a couple more

http://www.rickdavis.co.uk/rail/control-distribution.php  near the bottom of the page

At last but not least
http://www3.sympatico.ca/kstapleton3/851.HTM   with the circuit shown near the bottom & the club I am part of, now uses these & they are VBG.

I like the idea of soldering your own controller. It feels like some pleasant reminder in our over-computerized world. I would like to hear more of this topic and maybe a blow by blow account.

Helmut

Well this is the way i'm starting out again, i also like the idea of a custom built controller, ive got my enclosure an HF mobile linear amplifier as the enclosure, just needs a spray and fitting out with the control circuit, as its aluminum and meant to dissipate 200 watts of RF power its just the job.

Going down the road of simple but affective analogue linear control using 2 x LM338T voltage regulators both independent of each other gives me 5 amps x 2 options which i doubt i will get close to using all that power.

My transformer is fairly future proof at 300 VA and twin secondary windings, about 25 amps available should keep things ticking over for a while, once complete i will post some pictures.

Over the last few days ive just been gathering information of all up to date practices, but plan to make a start on our layout soon.    :cool wink

I'm attaching a circuit diagram with explanatory text (hope I can get it to load) As it stands it's ideal for most N gauge and 00 loco motors, may need a few changes for other scales like reduced voltage for Z or more powerful output transistors for 0 and above. I've not tried it on coreless motors, so maybe some experiment needed there. There are notes and additional diagrams for adding inertia and changing the overload cut out level, adding preset min and max speeds, and other suggested changes.