I want to design a matrix keyboard of 4*4 who can give me some advice?
I want to design a matrix keyboard of 4*4 in atmega16 microchip.
Who can give me some advice or some infor .The project includes 4*4 matrix keyboard and a LCM modole which has some menu.
Thanx!
Did you search the internet? The are plenty of them out there.
Use google and search for matrix keypad microcontroller. Add atmel if you are using that chip. The megas will all work about the same way for that purpose.
thanx mramos1
instead of doing a matrix, you can also use two cascaded encoders... it makes you use only 6 pins instead of 8.. and it's very easy in wiring and programming.
Last edited by ikalogic; 4th April 2007 at 06:39 AM.
Ibrahim Kamal
check my electronics and robotics page: http://www.ikalogic.com/
Thank you for your advice!
Wasn't/Isn't there a 74LS923 keyboard encoder that inputs a 4x4 matrixed keyboard and outputs 4-bits with strobe?
Dean
Dean Huster, Electronics Curmudgeon
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).
R.I.P.
Ok,now i am programing my menu of LCM ,but find it is difficult,who can give some good advice?
thank you!
I cann't find the datasheet of 74LS923,can you help me?
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