search

codaris / SharpManager

Applications for managing Sharp Pocket Computers
https://codaris.github.io/SharpManager/
Apache License 2.0
7 stars 1 forks source link

Value of pulldown resistors #1

Open fy7890 opened 2 weeks ago

fy7890 commented 2 weeks ago

Hi,

Could you let me know the value of the pulldown resistors?

Can I use 10KOhm resistors?

Thanks!

codaris commented 2 weeks ago

Yes, you should be able to use 10kΩ resistors.

A typical value for a pull-down resistor for a 5V signal from a battery-powered device ranges between 10kΩ and 100kΩ.

Higher value resistors (e.g., 100kΩ) minimize current draw from the battery but may result in slower response times for the signal to change states.

Lower value resistors (e.g., 10kΩ) ensure a stronger pull-down effect and quicker signal stabilization, but they will draw more current, which might be a concern for battery life.

It really doesn't matter that much -- I don't think you can harm the device -- you will just either use a little more battery or you will have an unstable signal that won't work.