5V USB PF train

[nuno2500]

A MOC powerer by an USB power bank (2200 mAh). Running at 5v it goes half speed with a DIY usb to PF adapter. Can be charged with a mobile phone charger. A good solution for events ;)

[pirzyk]

Interesting, so do you have a PF Receiver or you just control it via the polarity switch on the bottom?  How long does the battery last and how long does it take to re-charge?

What engine did you model your MOC after?  I see similarities to a EMD switcher but the cab is different.

[nuno2500]

Jim, i used the 8869 - Power Functions Control Switch only. I don´t know ir the IR works with only 5V.  After almost 2 hours i turn the power off...i have been testing it for a week and without recharge. 6x  AAA battery= 800 mAh. This powerbank= 2200 mAh. The design is not from a real train...just a bit of this and that from memory ;) 

I am working on an auto-stop mechanism placed on the track that counts laps  and stops the train like in the 4,5V days.

Best Regards,

Nuno

Edited September 5, 2017 by nuno2500
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[LEGO Train 12 Volts]

Great solution!

Very clever!

[dr_spock]

Nice idea. You could test to see if it works with IR receiver.  Its LB1836M motor driver Vcc can be up to 10.5V according to the spec sheets.

 

[Ludo]

According to the data sheet (Sanyo) are the allowable operating voltages @ 25°C Ambient temperature:

Don't know what the lowest VCC voltage is for the used Alpha chip, the controller inside the IR receiver controlling the motor driver chip.

The LB1836M absolute maximum voltage is 10.5V @ Ta = 25°C

[zephyr1934]

Brilliant solution to the size and cost of battery packs. I like the prospect of a wayside switch to reverse the train too... but just like the 4.5v reverser, I wouldn't depend on it for an unmanned display at the end of a track.