The Pull-up doesn't always have the resistor. What's important to know is the voltage level on the signal wire is when it is unplugged from the sensor; be it is high or low. If the signal is high unplugged the sensor is Pull-Down design. If the signal is low unplugged the sensor is a pull=up.
@@RodriguezRepairsThanks for the video! So the A3144 hall effect sensor is pull DOWN sensor? I didn't realize that there are pull UP sensors (Hall effect sensors that use pull DOWN resistor)...¿Do you know some model of pull up sensor? Thanks a lot! Greetings from Argentina!
You have that backwards I think. If the signal is high unplugged it will be a pull up sensor because the resistor will be between the signal sense wire and 5v reference, and when it gets unplugged the voltage gets pulled up. Vise versa for pull down. I just wanted to do a correction for anyone in the future, I know how conflicting information can confuse someone and drive them insane from trying to diagnose their vehicle or just understand how something works.
Hi, great video! One littel question. My escooters have a throttle with a hall sensor inside. How can he know how fast i want to drive? I think he would have to give full throttle at 5v and then no trottle at 0V, but how can he differentiate so precisely? A mystery for me 🤔🤔☺
So if I put a jumper wire between the 5 volt reference wire and the signal wire will it fool the computer to think everything's fine and get my check engine light off so I can pass smog?
Yea I got a bit confused too even though it was somewhat understandable. He just got the terms mixed up and wrote the schematic backwards. The pull down design uses a resistor between signal and ground and starts the signal or “sensing” wire at 0v and climbs to 5v. When disconnected the signal wire is empty. A pull up is the opposite and starts at 5v going down and when disconnected signal wire will have 5v equal to the ref 5v.
I don’t understand? Hall sensor will output 0-5 volts based on magnetic field regardless of an external resistor. There must be another purpose for the pull up or pull down? Noise interference perhaps?
Hy, i have a question, can you tell me how can i connect a loudspeaker digital volume control to a hall sensor (from finger throttle's ebike ) in order to be able to control volume. Thank you in advance for your answer
@@RodriguezRepairs yes. i want to control loudspeaker volume with hall sensor from finger throttle, but not only on and off.... i want to increase and decrease volume accordind to tension variation from hall sensor
and i want to connect the 3 pins of the hall sensor to the USB from finger throttle.... and the digital volume in a USB mother connector, in order to use a small USB cable for connection between toudspeaker and finger throttle's USB
There is no such thing as a pullup or a pulldown resistor. The resistor has an ohm value. Where the resistor is placed in the circuit determines the name of the circuit. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hHSRLfXBN7s.htmlsi=F5hCbRL6m4g43CKU
