| | | | |
 |  |  |  |
| |||||||
| Electronic Projects Design/Ideas/Reviews Are you building an electronic project or want to? Maybe you need some assistance? Come and submit your electronic questions here and let our experienced members find a solution. |
 |
| | LinkBack | Thread Tools | Display Modes |
27th April 2004, 04:35 AM
| (permalink) |
 Help on Buzzer Circuit Hi All, I'm not very good at designing circuits, and would like to enquire about building a small circuit. I would like to design a circuit with a buzzer that activates when a signal is transmitted from a microcontroller. This means when then microcontroller outputs a high (TTL), the buzzer activates. I would like to couple the buzzer to a 9V battery. Please help. Thanx | |
|
|
27th April 2004, 10:53 PM
| (permalink) |
| a few ways to do that ............. | |
|
|
|
27th April 2004, 11:54 PM
| (permalink) |
| Hi. Thanx for the suggestion. | |
|
|
|
28th April 2004, 12:06 AM
| (permalink) |
| The circuit posted should have a resistor in series with the LED in the opto coupler in order to limit the current. I suggest 330 Ohm. Also, the buzzer appears to be reversed. He has shown the + side of it connected to the - side of the battery via the opto. Len | |
|
|
|
28th April 2004, 03:55 PM
| (permalink) |
| ljcox is correct on both counts , Iposted the wrong drawing. I just got hijaak to migrate DXF to GIF and was learning that program.....sorry. Correct file: | |
|
|
Linear Mode
