| ??? 03/31/07 12:55 Read: times |
#136294 - Buzzer connections Responding to: ???'s previous message |
Hook the buzzer power to VDD and hook the buzzer ground to the 8051. Write a zero to the output to drive it.
The 8051 is designed to sink current, not source it. If the source current is too high, the output will think that you are trying to drive it to zero as an input, and the Ioh current will be reduced. This is described in detail in the 8051 data sheets. |
| Topic | Author | Date |
| how to use a simple buzzer? | 01/01/70 00:00 | |
| Try it ? | 01/01/70 00:00 | |
| that worked, but... | 01/01/70 00:00 | |
| current | 01/01/70 00:00 | |
| When you've found the current requirement... | 01/01/70 00:00 | |
| Buzzer connections | 01/01/70 00:00 | |
| Drivers | 01/01/70 00:00 | |
| will try it and get back... | 01/01/70 00:00 | |
| If the buzzer draws lots of current... | 01/01/70 00:00 | |
| Quote | 01/01/70 00:00 | |
| Correct | 01/01/70 00:00 | |
| ok... | 01/01/70 00:00 | |
| Numerous options ... | 01/01/70 00:00 | |
| only have 5V supply | 01/01/70 00:00 | |
| it might prove interesting ... | 01/01/70 00:00 | |
| Because you took a NPN instead of PNP... | 01/01/70 00:00 | |
| will try this | 01/01/70 00:00 | |
| kai | 01/01/70 00:00 | |
| I would use a PNP | 01/01/70 00:00 | |
| Do yourself a favor ... try it as he suggests! | 01/01/70 00:00 | |
| we all did some such thing ONCE, I believe | 01/01/70 00:00 | |
| hmmm.... | 01/01/70 00:00 | |
I don't know why,... | 01/01/70 00:00 |