| ??? 09/12/10 09:21 Read: times |
#178516 - I/O pin extension |
Can someone suggest a way of controlling nearly 450 outputs using 8052 or any of its derivatives.
I need to send hi or low signal to all the pins in a time interval of less than 450ms. I need to drive relays using the output pins. Is it possible using a micro controller? Can anyone suggest an alternative to the options listed below? 1)Using multiple controllers (at least 14 will be required) 2)Using latches or shift registers The problem with this thing is that how to get their output in the form of analog voltage? 3) Using the sort of matrix that is used in keyboard or keypad Although this thing sounds feasible to me but in those things matrices are used as inputs and has switches. To use it at the output will require a switch with same mechanical functionality but with electronic control. If not an alternative, please comment on what you thing about the above options |
| Topic | Author | Date |
| I/O pin extension | 01/01/70 00:00 | |
| Start by specify your need | 01/01/70 00:00 | |
| you really have to list down the full requirements | 01/01/70 00:00 | |
| A suggestion | 01/01/70 00:00 | |
| Specefic Requirements | 01/01/70 00:00 | |
| Why relays? | 01/01/70 00:00 | |
| But dot matrix printers normally don't have X*Y array head | 01/01/70 00:00 | |
| Only need *one* column of dots! [ED] | 01/01/70 00:00 | |
| Head has constant speed w/o steps even with stepper motors | 01/01/70 00:00 | |
| reply | 01/01/70 00:00 | |
| not helpful! | 01/01/70 00:00 | |
| Necessity of relays | 01/01/70 00:00 | |
| Relays are not necessary | 01/01/70 00:00 | |
| What's a "design"? | 01/01/70 00:00 | |
| Discrete or integrated | 01/01/70 00:00 | |
| So what's the reason for a slow ctar-at-a-time head? | 01/01/70 00:00 | |
| Printer Purpose | 01/01/70 00:00 | |
| Still no specific reason for a matrix! [Ed] | 01/01/70 00:00 | |
| More care while finding solution | 01/01/70 00:00 | |
| RE: "many others" | 01/01/70 00:00 | |
| Smaller than a relay | 01/01/70 00:00 | |
Relays Take Drivers Too | 01/01/70 00:00 |