hi,
am new to microcontroller.i have been assigned a project of calculator.i am stuck on one thing that when i have to give input through keyboard to microcontroller my pc voltages and 8051 microcontroller voltages are not same.so what device i must use in between them to make my pc and microntroller voltages same.do i have to use voltage converter.please elaborate.thank u.
Re: HOW TO MAKE PC VOLTAGES AND MICROCONTROLLER VOLTAGES SAM
oister said:
hi,
am new to microcontroller.i have been assigned a project of calculator.i am stuck on one thing that when i have to give input through keyboard to microcontroller my pc voltages and 8051 microcontroller voltages are not same.so what device i must use in between them to make my pc and microntroller voltages same.do i have to use voltage converter.please elaborate.thank u.
Please ask a good question and you've got a good answer. How the heck you want the reader knows what are exactly your voltage levels? Every problem may have a particular solution. Ask yours again.
Re: HOW TO MAKE PC VOLTAGES AND MICROCONTROLLER VOLTAGES SAM
if u are using parallel port u can interface it directly to the controller as i suppose you will be using 5v controller. If you are using serial port then you will have to use MAX 232 IC.
Re: HOW TO MAKE PC VOLTAGES AND MICROCONTROLLER VOLTAGES SAM
amol_shah is correct...the parallel port connection has 1 VCC of 5V and Multiple ground. The source voltage of the controller must same to the source voltage of the PC and must be have common connection....
u can use a buffer in between parallel port and your controller for protection of the port, because sometimes when working with parallel port u tend to damage your port by little short circuit or over current to the port.