1. Please provide your name
2. Please provide your number
3. Please provide your inquiry
Start Chatting in 3 easy steps
No registration required.
No registration required.
370187 ads
We are one of the largest free online selling communities with thousands of active sellers.
249743362 views
Do you have something to sell? Your next sale might be just a few clicks away.
4.7 stars
Based from 899 member feedbacks. We value your suggestions and use it.
Think It! Make it! Invent!
SKU: PROD0068
DESCRIPTION
Matrix keypads use a combination of four rows and four columns to provide button states to the host device, typically a microcontroller. Underneath each key is a push button, with one end connected to one row, and the other end connected to one column.
In order for the microcontroller to determine which button is pressed, it first needs to pull each of the four columns (pins 1-4) either low or high one at a time, and then poll the states of the four rows (pins 5-8). Depending on the states of the columns, the microcontroller can tell which button is pressed.
This seller has been a member since: May. 28, 2015
Member Location:
Total Classifieds: 650
Why seller feedback is important?
Transact with most credible & reputable sellers
Know the seller you are going to deal with
Claim warranty long after purchasing the item
Warn you and other buyers against scams
Motivates sellers to provide good service