dr_spock

There was probably some children safety and liability lawyers aspect to going away from AC adapters to batteries. The newer battery boxes now have screws to keep closed. G-scale garden railways modelers also make use of battery powered trains if they are not keen on outdoor track maintenance and corrosion related electrical issues.

Something like this could be 3D printed to make an adapter to feed 9V track power to the PU hub if you don't want to solder wires directly to the PU hub circuit board. https://www.thingiverse.com/thing:6858192

You could power the PU train motor off the 9V tracks. You would need a power pick up wheel set. Connect the PU train motor cable to the pickup. If you make your own female PU adapter, pin 1 & 2 are the power control lines. Powering the PU hub off the 9V track could be done. You would still need a power pick up wheel set. You can not plug into the A port. You would need an adapter to take the place of the batteries holder. Probably have to set the 9V train controller to full 9V output. Also you'll need the +/- polarity to be correct or have some fancy diode bridge.

You might be able to do with dumb devices like the simple medium motors that don't communicate back to the hub.

I left my faded smiley heads faded and bought new ones. A fine point sharpie, a head mounting jig, and some gcode on a CNC machine or 3d printer could get consistent results.

Cars are everywhere. I see them every day and avoid getting run over by them. Construction machines, not so much. I've only seen one GBC type machine using small bowling balls at a science museum. Folks may want to recreate what they see often in real life in LEGO. At the end of the day, LEGO is a business. They'll take the road that'll make the most easy money.

Do you have access to a digital multimeter? It can help verify that the wires are connected to the correct pins. Also measure how much current the monster motor is drawing. LEGO devices some times have a 800mA limit before the resetable fuse kicks in.

Clever use of chain links on the tower crane trolley.

Hope to see them eventually in black or bley.

The simple M motor without feedback is fine for GBC modules and what not. Why pay extra for a rotational sensor when you don't need it for a particular type of MOC? Costs add up when many motors are used and worn out from displaying at many events and shows.

It could be the new 4 port PU hub doesn't recognize or support the PU train motor. The cable basically IDs as a PU train motor. What are you using to control the new hub?

To make the adapter I had to 3D print my own connectors a while back ago. Now those connectors can be found on aliexpress.com. Search for wedo cable and for technical power function connector. To ID as a PU train motor to the PU hub, connect pin 3 to pin 6 and pin 4 to pin 5 on the PU connector. Connect pins 1 and 2 to the C1 and C2 pins on the PF connectors to power the PF motor.

I do the same with an old 3.6V NiCad drill. I had to replace the worn out NiCad cells with a Li-Ion cell + BMS. Still its slow rotation speed is perfect for reaming holes in 3D printed parts to 4.8mm for Technic pins and axles.

I'm on the free 1000 image limit on Flickr. I used to post the best pic of the MOC to Flickr, the other pics of the MOC to Brickshelf, and miscellaneous to Photobucket. Photobucket pics are no more. Brickshelf is going. At this rate, I may have to setup a server at home. I don't think bandwidth would be an issue since I resized all my photos to Eurobricks specs of 1024x768 or 800x600 and I am not popular.

Win or lose, the corporate lawyers still get paid and can buy LEGO.

I drive my PF train motor with the PU hub using a PF to PU adapter cable. It works the PU remote and PU app.

1x2 plates or tiles could be used to keep the magnetic couplers from uncoupling.

Gotta have the classic monkey.

Even if manufactured at the same time, motors can have different performance based on hours used, how much of your cat's hair is stuck in the mechanism, etc. Maybe create a performance map based on each motor's rpm vs duty cycle. Then use the maps in a controller to look up the duty cycle of each motor for the desired rpm.

There is an option to "insert image from URL" in the "Other Media" button if pasting the image URL didn't automatically work in the editor.

Is this a new feature? Post now and register later.

Interesting. Looks like the insulation slid off the bare wires from pulling or under tension.

How about wiring a USB connector directly to the 5V rail of a PC power supply? This old PC PSU lists 22A max on the 5V.

Does LegoRCX.py work with Linux?

I prefer cars that I can fix myself. I had to buy a new tablet because the car diag app no longer works on my old tablet. Same with PU App v4, seems kind of e-wasteful. The older tablet still works prefectly fine with very good battery life.