Hacking Power Tools to run of Ebike Batteries

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e-beach   1 GW

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Re: Hacking Power Tools to run of Ebike Batteries

Post by e-beach » Jan 23 2022 10:16am

Wondering if it would be better to install a new controller. I did just that on my Ryobi leaf blower when the trigger electronics went bad. To replace it was over $100 usa so I bought a $20.00 dollar scooter controller with a photometer and now run my blower with that. It works great.

:D :bolt:
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spinningmagnets   100 GW

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Re: Hacking Power Tools to run of Ebike Batteries

Post by spinningmagnets » Jan 23 2022 12:04pm

I noticed that when a cordless tool got older, the replacement batteries were very expensive. For only a few dollars more you can get a new tool/battery combo.

Over and over I verified this on various tools. Then I realized that they wanted the old tool discarded.

This also means that a decent used tool can be bought very cheaply. I havent experimented with step-down DC/DC converters, but I am very interested in EGO tools. They are advertised as 56V, but have been verified to use 14S, which is 58V when fully charged.

calab   100 kW

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Re: Hacking Power Tools to run of Ebike Batteries

Post by calab » Jan 23 2022 9:48pm

Could you not get any markings on the trigger usually its just generic parts.

This guy takes apart lots of tools https://www.youtube.com/c/arduinoversusevil2025/videos
e-beach wrote:
Jan 23 2022 10:16am
Wondering if it would be better to install a new controller. I did just that on my Ryobi leaf blower when the trigger electronics went bad. To replace it was over $100 usa so I bought a $20.00 dollar scooter controller with a photometer and now run my blower with that. It works great.

:D :bolt:
Last edited by calab on Jan 24 2022 12:52am, edited 1 time in total.

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fechter   100 GW

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Re: Hacking Power Tools to run of Ebike Batteries

Post by fechter » Jan 23 2022 11:15pm

There is probably some serial data communication between the battery and the tool. This prevents using someone else's battery and they will claim it is a safety feature. This seems to be increasingly common with battery powered tools (and ebikes too). By probing the lines, you may be able to see the data being transmitted. If you can record and copy the data string, it could be spoofed with an Arduino to fool the tool.
"One test is worth a thousand opinions"

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e-beach   1 GW

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Re: Hacking Power Tools to run of Ebike Batteries

Post by e-beach » Jan 24 2022 11:38pm

calab wrote:
Jan 23 2022 9:48pm
Could you not get any markings on the trigger usually its just generic parts.....
I found a direct replacement but it was well over $100 usa. I couldn't source any generic part. In any case I like it better now because I can set the power without holding the trigger. If I want more or less power I simply twist the pot. Less fatigue on my hand. The scooter controller is a definite improvement.

:D :bolt:
Favorite Quotes:
"This is L.A., sugar. There is no 'over the top." Chris Erskine
"At a certain point the entropy wins." Maria Helena Braga

Current Build: ProFlex 757 Expert full suspension. Yescomusa 36v 800w Rear DD, upgraded 10AWG solid core through axle phase wires. 15ah Headway, 1000+ cycles, 80% DOD 30A Tronsung controller.

Past: Trek 4500 Yescomusa 36v 800w front DD.
Liahona, Yescomusa 36v 800w generic front DD.
1992 Trek 800, Yescomusa 800w 36v front DD.

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