legoman666 Posted July 21, 2015 Posted July 21, 2015 (edited) My latest effort: I discovered the other day that if I stick a loco at either end of the train, I can run at slow speeds very smoothly and also eliminate magnets pulling apart. Very glad to have figured this out, since I was hitting the limit of my neodymiums. Steel wheels for track power. Sound unit has a battery built in that charges from 5V. I put in a DC-DC converter so it'll recharge itself from any track voltage (up to 35?). I run 24V at home and at our shows. Edited July 21, 2015 by legoman666 Quote
JopieK Posted July 21, 2015 Posted July 21, 2015 Great job legman666, what kind of module did you use for it? The train indeed drives very well at such a slow speeds, very realistic. Quote
mikezang Posted July 21, 2015 Posted July 21, 2015 Can you show me your idea and circuit in detail? Quote
legoman666 Posted July 21, 2015 Author Posted July 21, 2015 (edited) Great job legman666, what kind of module did you use for it? The train indeed drives very well at such a slow speeds, very realistic. Thanks! It's just a cheap china bluetooth boombox a LUG member got off of eBay for $11. Probably couldn't find it again if I tried. I stripped it down as much as I could so it'd fit in a 7 wide shipping container. Can you show me your idea and circuit in detail? It's actually really simple. Steel wheels pick up 24V from the track, then there's a bridge rectifier that feeds into a DC-DC converter set to 5VDC. I soldered the 5V directly to the PCB inside the bluetooth module to where the USB input would normally go in. The bluetooth boombox had the battery built in, so I didn't have to figure out how to charge a Li-ion battery. The hardest part is getting power from the track. Edited July 21, 2015 by legoman666 Quote
dr_spock Posted July 21, 2015 Posted July 21, 2015 NIce. Good way not having to swtich to Kadee couplers or to ones that can be locked together with a 1x2 plate or tile. Quote
legoman666 Posted July 25, 2015 Author Posted July 25, 2015 NIce. Good way not having to swtich to Kadee couplers or to ones that can be locked together with a 1x2 plate or tile. My Horizon Express has to use 1x2 tiles to hold the couplers together, pain in the butt to get those on there. Besides, American trains don't use that style coupler, so brick built is the only way to go! Quote
LEGO Train 12 Volts Posted July 26, 2015 Posted July 26, 2015 Huge and impressive! The sound is the icing on the cake! :wub: Quote
HadSterne Posted October 1, 2015 Posted October 1, 2015 (edited) Thanks for sharing this info with us. I want to know which bluetooth module it is using? Also which battery it is needed? Is there any specific board for its control if not then what is the circuit configuartion? pcb assembly Edited October 7, 2015 by HadSterne Quote
legoman666 Posted October 1, 2015 Author Posted October 1, 2015 Thanks for sharing this info with us. I want to know which bluetooth module it is using? Also which battery it is needed? Is there any specific board for its control if not then what is the circuit configuartion? I made several of these for use in the locomotive: http://www.eurobricks.com/forum/index.php?showtopic=87340 The boombox came with the battery and its own circuit board, so I'm not sure what bt chip it actually has. Probably something cheap. Quote
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