How Shopping Cart Wheels Use 7.8 kHz Signals for Locking and Unlocking
By
mystraline
A weekday bagel. Dependable, satisfying, no fuss.
Summary
This article explains how to hack electronic shopping cart wheels by playing a 7.8 kHz audio signal through a phone speaker to lock/unlock them. It reveals that most shopping cart wheels listen for this specific frequency from underground wires or management remotes to control their locking mechanism.
Key quotes
· 3 pulledMost electronic shopping cart wheels listen for a 7.8 kHz signal from an underground wire to know when to lock and unlock.
A management remote can send a different signal at 7.8 kHz to the wheel to unlock it.
Play the below sounds through your phone speaker and hold it next to a Gatekeeper Systems wheels to lock/unlock.
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