Basically no, it's almost certainly a mechanically commutated motor, more voltage means it'll spin faster, and spinning faster means it draws less current. Same reason it's OK to run 12V through old 6V automotive starter motors (most of the time). Like Dan said, as long as you don't go way over the nominal voltage, and you're not leaving it hooked up for a while, it's probably fine. Thanks, Jonathan On Wed, 10 May 2017 01:44:04 -0400 Evan Koblentz via vcf-midatlantic <vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
I wanted to test one of the Lego motors without setting up the whole kit.
The motor is designed for 4V DC.
Dug through my bin of random wall warts. Closest I could find is 5V DC (and 0.5A but I'm not sure if that matters).
Snipped off the wart's barrel connector, spliced a mini-banana lead to each wire, and the motor happily spun away.
When I tested the Lego computer interface port voltage it showed around 3.7x on my multimeter whereas the wart produces 5 true.
Will I cause any long-term damage to the 30-year-old Lego motor by running it at 25% higher voltage than intended?