Need advice for 9v battery box

[Elektrychka]

Hello everybody,

I'm planning to build an 8 stud wide Latvian railbus AR2-02 (photo: https://trainpix.org/photo/99787/). As I was experimenting with the real bricks, I noticed that small PF battery box looks bad inside the train. Fortunately, when I was surfing Eurobricks, I found 6399, Airport Shuttle review. I discovered there are very small 9v battery boxes. I went to bricklink and saw the prices for this box are very small - just from 2 to 4 € per box.

So there is a question: will that box work with train motor and IR receiver if I use it through transformer 8886? Will there be any harmful effects for PF elements? Does it pay off if I will buy more 9v battery boxes instead of PF ones?

Sorry if there was same topic.

Also sorry for any mistakes - I translated some words via Google translator :)

Edited March 28, 2016 by Elektrychka

[kieran]

People have done this and it works. You need a cable to go from the old 9v tones pf. The battery will not last long

[Elektrychka]

Did I understand correctly that 8886 cable has both connectors for PF and 9V?

[LEGO Train 12 Volts]

Yes is correct but the battery will not last long.

Anyway for small application the small battery box is usefull

Edited March 29, 2016 by LEGO Train 12 Volts

[bricks n bolts]

Did I understand correctly that 8886 cable has both connectors for PF and 9V?

Yes, but I think the 9V end goes to the PF pins for output rather than power in, so are meant for 9V motors rather than 9V power sources.

So best option would be to make your own cable, splicing PF and 9V cable ends.

Edited March 29, 2016 by bricks n bolts

[Breakdown]

Yes, but I think the 9V end goes to the PF pins for output rather than power in, so are meant for 9V motors rather than 9V power sources.

So best option would be to make your own cable, splicing PF and 9V cable ends.

I'll confirm this as well, as I was trying to add a IR Receiver to my monorail, it works if you use the new 6 X AAA battery box, but not with the old-school 9V box. Would recommend buying heatshrink from hobby store and using a heater (maybe a hair dryer would work).

Hello everybody,

I'm planning to build an 8 stud wide Latvian railbus AR2-02 (photo: https://trainpix.org/photo/99787/). As I was experimenting with the real bricks, I noticed that small PF battery box looks bad inside the train. Fortunately, when I was surfing Eurobricks, I found 6399, Airport Shuttle review. I discovered there are very small 9v battery boxes. I went to bricklink and saw the prices for this box are very small - just from 2 to 4 € per box.

So there is a question: will that box work with train motor and IR receiver if I use it through transformer 8886? Will there be any harmful effects for PF elements? Does it pay off if I will buy more 9v battery boxes instead of PF ones?

Sorry if there was same topic.

Also sorry for any mistakes - I translated some words via Google translator :)

Not really sure if it would apply to your application (looked at the pic of the train that you're trying to emulate. One of the most infamous (and rare) lego trains is 7750 (12V era), the front car does nothing but roll, the motor and weight bricks (no battery pack) were in the coal car. It doesn't really have to be a "coal" car, you can make it a cargo car, etc, but it's an effective cheat to enable the front of your train to be free of constraints and push the power source back, you might be even able to assemble a train that has a hinged opening above the battery pack to allow you to turn on/off quickly. The only disadvantage would be that you'd have wires going from car to car if doing lights.