Review: List

Return to trail tech dial-a-brightness AC voltage regulator

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Rad!!	Sunday, February 8, 2026
taco eater : Jon Lohne from Santa Rosa, CA United States

I buy these in bulk cus I use them on all my bikes.

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Very basic, but does the job most of the time.	Saturday, September 7, 2024
taco eater : rambunctious_rockhound from oh-eye-oh

This is a "voltage dumper" style of regulator. You wire the yellow wire to the output of your light coil, and the brown wire to the frame ground.

When the voltage goes too high, it dumps the excess voltage automatically. It does this so quickly that the output stays relatively the same as the engine increases in speed.

If you have a basic moped, with a simple headlight wired directly to the coil, this will work really well.

THIS IS NOT A RECTIFIER, IT DOES NOT PRODUCE DC, IT WILL NOT WORK WITH A BATTERY, IT WILL NOT CHARGE YOUR PHONE!

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Voltage Regulator	Thursday, February 24, 2022
taco eater : Adam Rogers from versailles, KY United States

only two wires, no connectors included, the adjustable part has been covered so as to prevent me from adjusting. What the hell do, splice into the yellow wire to headlight and other to ground?

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So far so good	Monday, October 14, 2019
taco eater : bigbadbrother from San Jose, CA United States

Be sure to use good connectors and hard mount it so its not shacking around

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Works as expected	Monday, July 1, 2019
taco eater : Jonah Loshnowsky from Peru, IN United States

Spliced in another wire on the yellow one, because the tomos a35 has a 3 prong regulator, then soldered on some connectors. Everything worked great, although i never messed with the adjustable voltage screw. if it ever claps out ill rewrite my review, maybe.

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Nice	Monday, June 3, 2019
taco eater : marc silverstein from bell canyon, CA United States

Works great. For those of you that want to run a battery in order to eliminate lights dimming at idle, use a heavy diode in line to the battery. You will need to change the horn to a DC horn.

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Reliable AC regulator	Thursday, August 2, 2018
taco eater : Robbit the Hipper from Hobbitland in Upper Mopedizia

Use this on any non-stock Hobbit to dump AC voltage above the dialed-in setting. Factory setting of 13.8 is fine, especially if rectifying after the regulator for LEDs or other DC accessories.

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diagram does not match regulator	Saturday, April 28, 2018
taco eater : Rex from Grand Rapids

the regulator sent has a yellow and a brown(red?) wire and the wiring diagram has 2 yellows, black, red, yellow/red.

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The one you want.	Thursday, January 25, 2018
taco eater : Jonathan Feldman from Portland, OR United States

In my opinion, the best voltage reg treats carries.
The cheaper ones are kinda hit or miss.. sometimes they work perfect... sometimes you're blowing tail lights left n right.

Bypass the bullshit and buy this guy instead.

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It go down on its knees & stripped	Tuesday, December 26, 2017
taco eater : Countryob from Princeton , MA United States

I tried to adjust the screw, and I literally stripped the threads of the screw without even trying. Absolutely bs, I emailed them and they did send me another regulator but I really think they should rethink this.

What ever they are putting on the screw head to protect against weather, its horrible and makes the screw head junk.

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