Help!

[rway]

I m having some problems to transmit pulses that represents respective digit on a 3x4 keypad?

Do i need a microcontroller ? The transmitted pulses are needed to be recognize by the receiver and hence show it on a 7-segment led.

thanks for any reply....

 

[Someone Electro]

The qestion is do you want an microcontroler.Using an MCU can greatly simplefy things and make to circuit nedded much smaller.

 

[mstechca]

I m having some problems to transmit pulses that represents respective digit on a 3x4 keypad?

Do i need a microcontroller ? The transmitted pulses are needed to be recognize by the receiver and hence show it on a 7-segment led.

thanks for any reply....

if you don't want to use a microcontroller, you can use a data encoder and a shift register to transmit the data serially, but as "someone electro" says, a microcontroller makes things easier, and it does, provided that you program it in the first place.

 

[rway]

So if i downloaded the program into a mcu already, what are the components should i use to transmit the pulses from the tx to another rx?

there are 3 ways to transmit digital signal right? ASK,PSK and FSK.
which 1 to choose?

best regards.....