Hi Everyone,
This is probably not a new idea but I have modified my Lego Technic power box to connect directly to a 9V power supply to save on batteries and to generate more power by being able to increase the voltage. I have uploaded the video to my YouTube channel I started 4 weeks ago. I like building heavy lifting cranes and needed more consistent power and also with the power supply I have I can measure the current too. Let me know if you found this useful.
Rob