Chrissaf Posted August 8, 2018 Share Posted August 8, 2018 It can and has been done. There are photo's and possibly instructions on this forum somewhere, but I can't find them in a quick look.The person you need to look for is called GoWest. Link to comment Share on other sites More sharing options...
Rog RJ Posted August 8, 2018 Share Posted August 8, 2018 One of GoWest's radio control sets here https://www.hornby.com/uk-en/forum/radio-controlled-/#post-174085 Link to comment Share on other sites More sharing options...
Go_West Posted August 8, 2018 Share Posted August 8, 2018 Hiall you really need just to get it running is a 12- 14 volt DC power supply and an 8 volt DC power supply if you add a relay to switch from 12-14 to 8 volts and link this with 2 micro switches plus a second relay to switch the 8 volt polarity that should work A more involved unit would be a pwm for a 16 volt power supply so a control to the heater settings can be achieved and a fixed 8 volt dc for the servo control along with the above switching will also work. The engine heaters run at 6 amps so a beefy power unit for the heaters a trip is a good idea for such high power. ken Link to comment Share on other sites More sharing options...
Kazaam Posted August 9, 2018 Share Posted August 9, 2018 HelloThanksI found your topic about radio control but on photo I see something looking like the second part of official controller.https://www.hornby.com/us-en/forum/build-your-own-radio-control-system/?p=1If I understand your explaination correctly :- 12-14V applied on track activate heater- Switching to 8V give possibility to control motor for moving train and polarity define directionFor the boiler, is it needed to apply specific polarity or it can be the same as direction use ?PS : Not malware but mallard (thanks auto correction) Link to comment Share on other sites More sharing options...
Go_West Posted August 9, 2018 Share Posted August 9, 2018 The high dc voltage can be connected any way round this does not matter as you are only powering up the 2 heaters to boil the water.the 8 volt dc will be polarity sensitive as it will determine in which direction the engine will travelKen Link to comment Share on other sites More sharing options...
Go_West Posted August 9, 2018 Share Posted August 9, 2018 Try building this and hang it on a 12 - 14 volt dc power unit the transistor is a 2N 3055 Link to comment Share on other sites More sharing options...
2e0dtoeric Posted August 9, 2018 Share Posted August 9, 2018 Build what? No image, GoWest!Just curious - how does the loco know it is being given an 8 volt direction signal, if it is getting a 14v heater drive? Link to comment Share on other sites More sharing options...
Go_West Posted August 9, 2018 Share Posted August 9, 2018 Sorry copy and paste didn't work just a small box I think this will stay up/media/tinymce_upload/1c493cef68e684a011350c30d8c4f10c.JPG Link to comment Share on other sites More sharing options...
Go_West Posted August 9, 2018 Share Posted August 9, 2018 2eits a very simple circuit you might just see a single transistor on the pcb below the network of resistors on the base of the transistor will make it switch on a relay when 16 volts is on the power rails when the volts drop to 8 volts the transistor switches off the relay drops out if the contacts are wired to the motor when off then on seeing the 8 volts the motor will run all you need to decide is in which direction should the motor run?this is determined by the switching on the controller regulator lever as to pos neg or neg pos it's the operation of this lever that changes not only the 16 volt to 8 volt but the pos neg bit to.hope this helpsKenday /media/tinymce_upload/e7bec79e28f04cc2d328e0c343de67e4.jpg Link to comment Share on other sites More sharing options...
Kazaam Posted August 10, 2018 Share Posted August 10, 2018 I found this on another site, I tried it with a pcb simulator, if you use values from right side table it's working/media/tinymce_upload/bb5a03aeb6c2a439b2097ae75113c8bc.jpgAnother question, I read that sometimes peoples heard clics from relay, that mean I have to switch regularly to 16v to keep boiler enought warn, is it right ? Link to comment Share on other sites More sharing options...
2e0dtoeric Posted August 10, 2018 Share Posted August 10, 2018 Oh - I see now. I was thinking too complex, when in reality it is pretty crude really!Either 14v any polarity to heat the boiler, OR 8v either polarity to control direction and speed - not one overlaid on the other (a bit like poor man's DCC), the 8v being manually pulsed up or down to 'step' the motor and control speed. Link to comment Share on other sites More sharing options...
Go_West Posted August 10, 2018 Share Posted August 10, 2018 Thats a description I posted some time back giving how it works and that is all that is needed to control the motor I did redesign a new system using an SSR which makes the unit smaller as I fit the electronice in the smallest of places so the cab can be detailed like the real thing plus crew.Ken Link to comment Share on other sites More sharing options...
2e0dtoeric Posted August 10, 2018 Share Posted August 10, 2018 Thanks, Ken. Now that you mention it, I vaguely recall seeing it, but as my interest is only of the 'passing' variety, I had forgotten. Link to comment Share on other sites More sharing options...
Kazaam Posted August 10, 2018 Share Posted August 10, 2018 Sure for 7808 pin numbers ? I think 2 and 3 should be inverted (number on schema not pin) Link to comment Share on other sites More sharing options...
2e0dtoeric Posted August 10, 2018 Share Posted August 10, 2018 All 78xx regs have the ground pin on the centre commoned to the heat-sink tab. Link to comment Share on other sites More sharing options...
Go_West Posted August 10, 2018 Share Posted August 10, 2018 This is the pin out for 78xx reg's/media/tinymce_upload/d8309e466559f3071ae8093f0846c9a6.JPG Link to comment Share on other sites More sharing options...
Chrissaf Posted August 12, 2018 Share Posted August 12, 2018 Hello I found for a good price a live stream malware.I was very happy until I understand that controller is mandatory.... and impossible to getAfter looking on web and this forum I get some info about 8-18V and pwm Do you think it's possible to make a controller from scratch to control my machine ?Thanks in advance Link to comment Share on other sites More sharing options...
Kazaam Posted August 16, 2018 Share Posted August 16, 2018 Yep, on your schema you put 3 at middle pin 😀Here full schema, with command in left and loco circuit on rightjust boiler is replaced by a lamp/media/tinymce_upload/a2f8a71279ccb7bfd9e5328e37c5db5a.jpgEdited from proteus, if someone need file to make pcb or anything else, just tellthanks for all infos Link to comment Share on other sites More sharing options...
Go_West Posted August 17, 2018 Share Posted August 17, 2018 Switch sw2 should be a 3 way switch or 2 micro switches connected to a relay to switch the power off and on at 16 volts may be not the sw1 and after the change over part is the track to the loco pcb Link to comment Share on other sites More sharing options...
Go_West Posted August 17, 2018 Share Posted August 17, 2018 Also the heater is not. Wired to the relay the contacts would burn out at such a high current if you check my drawing back a bit you will see the heater is wired into the supply. Link to comment Share on other sites More sharing options...
Go_West Posted August 18, 2018 Share Posted August 18, 2018 I don't think your diagram is right and in practice will not work?ken Link to comment Share on other sites More sharing options...
Kazaam Posted August 21, 2018 Share Posted August 21, 2018 Works on simulator, need more relays and protectionFor heater, it means that it works continuously ?I don't understand your remark about sw1, who switch power from 12V to 8V for motor activation? Link to comment Share on other sites More sharing options...
Go_West Posted August 22, 2018 Share Posted August 22, 2018 the 1 uf is to small a value and the heaters are not wired to the relay you left out the bridge rectifier so i think you will find the relay switching in and out when the engine runs over poor track look back at the Hornby PCB and rethink?here is a simple control unit that will work with Hornby Live Steam engines and replaces your switches sw1 and sw2 making for a more auto operation../media/tinymce_upload/c19e1050fc317c9c67819346d76e0c56.jpg Link to comment Share on other sites More sharing options...
dave_armitage Posted September 13, 2018 Share Posted September 13, 2018 ok first time i have posted but try getting in touch with 00live steam club they might have a controler they should be at the N.E.C in vovember also google it you should get a replycheers Dave Link to comment Share on other sites More sharing options...
Rog RJ Posted September 13, 2018 Share Posted September 13, 2018 Actually, you have posted once before https://www.hornby.com/uk-en/forum/sounds/?p=1/#post-94141 Link to comment Share on other sites More sharing options...
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