On 1/13/07, Wallace Collins <[EMAIL PROTECTED]> wrote: > Hi S Scalers, > > Here is where I asked for but didn't get help. I had been > told > before, I am sure by someone at Miniatronics, that they could be used in a > caboose by putting a resister in series with the Unit. This seemed > logical > since all the motor did was put resistance in the circuit. > > OK experts: 1. What resistance should I put in series with the > Unit to replace the missing motor?
You would need a high-powered low-valued resistor to do the job, but the technique I've seen used for years is the use of a 12-volt auto bulb such as in this circuit: http://www.mrollins.com/pwrsp1.html The circuit uses a full-wave bridge rectifier but you can also use 2 pairs of diodes wired in reverse across the light(s). Some marker light or drumhead kits used to come with the bulb in the packaging for just that purpose. > 2. The lamps were wired in parallel. Should I try wiring three in > series? > Since they have equal 1.5 volt ratings I assume they should light like > series Christmas lights, with the same problem - if one burns out they all > die. The Miniatronics lady said some wouldn't light at all What say > you? leave them in parallel - otherwise you need to supply a higher voltage, and like you've noticed, in a series string one goes out, they all go. 3. Finally, any other ideas for constant lighting two 1.5 volt marker lights > (other than a battery- Turning on and off from a battery would be too > tedious on my layout. Trains don't get parked in reach). Wally Collins At the same site above you may find circuits using small IC voltage regulators (for example, http://www.mrollins.com/constant4.html), maybe a bit more complex and costly for the average user. Ken [Non-text portions of this message have been removed] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
