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The FIVE-FOUR Crowdfunding Campaign Is Coming!

We're working toward a crowdfunding campaign to do a production run of FIVE-FOURs in the VERY near future - sign up for notifications by providing an email address. (We promise that we won't ever share your email with anyone, and will only send you email relating to the FIVE-FOUR crowdfunding campaign.)

Opt-In Notice: By providing your email address to us via this page, you are authorizing us to contact you in the future regarding our upcoming crowdfunding campaign. This is an OPT-IN mailing list - you may request removal at any time by emailing us at general (at) byoutton (dot) com.


It's tiny. It's powerful. It's a 4-amp load switch for any 5-volt project.
It includes special features for use with single-board computers and microcontrollers.
It's the b(you)ttOn FIVE-FOUR™.

Give your smart project a smart power switch, quickly, easily, and economically.

Learn More...


Buy a FIVE-FOUR Now:
Module Only : $TBA | Complete Kit : $TBA

FIVE-FOUR Downloads:
Users' Manual (PDF) | SBC Communications Software (for Linux)
Mounting Hole Templates (PDF, 1:1 scale): US Letter | A4





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