| ??? 10/07/05 09:34 Read: times |
#102066 - Doubts regarding AT89C51 Port Usage |
Microcontroller Used: AT89C51
1)I need to operate a PhotoMOS relay using port1. Port1 is initially in high state when the microconroller is powered. So should it be made low using the codes to make the relay connected to that specific port to operate..? I will be connecting the relay in the sink current mode.. 2)I am using P3.2 as start button to generate timing signals of various intervals through Port1 (eg: p1.1 and p1.4 are on for 4 to 15 sec..etc.,)in a time slot of 50Sec.. In this the start button (push button switch)connected to p3.2 could produce bounce . So, can any one tell me How to over come this problem by altering codes or circuits(in what manner). 3)I need to connect a ferrite bead to ground the Microcontroller.can any one suggest me the correct method of connecting the Ferrite bead, and how the value of the bead is chosen?? |
| Topic | Author | Date |
| Doubts regarding AT89C51 Port Usage | 01/01/70 00:00 | |
| Answers | 01/01/70 00:00 | |
| your suggestions were useful | 01/01/70 00:00 | |
| Central ground star point | 01/01/70 00:00 | |
| doubts | 01/01/70 00:00 | |
| Why using an interrupt? | 01/01/70 00:00 | |
| use an interrupt for debounce, not key | 01/01/70 00:00 | |
| This is what iam going on with | 01/01/70 00:00 | |
| Why even consider sleep mode for a machi | 01/01/70 00:00 | |
| can RC network eleminate bounce | 01/01/70 00:00 | |
| nope, you will be hanging at the noise m | 01/01/70 00:00 | |
| Debounce | 01/01/70 00:00 | |
| Possible, but... | 01/01/70 00:00 | |
| What else does your program? | 01/01/70 00:00 | |
| outside of 50 sec slot | 01/01/70 00:00 | |
| do I get it right | 01/01/70 00:00 | |
| yes | 01/01/70 00:00 | |
| ttthhattsss all fffolks | 01/01/70 00:00 | |
| here is my code | 01/01/70 00:00 | |
| I did not ask that | 01/01/70 00:00 | |
Avoid my previous post "here is my code" | 01/01/70 00:00 |