Basic Circuit without Stamp - sound a siren for 5 seconds when button pressed?
Morrolan
Posts: 98
Hi guys,
I've suddenly found a need to create a simple circuit without a stamp, but my brain has gone on holiday! I require a circuit that involves a button and a buzzer. Once the button is pressed, (momentary push, no need to hold it) I want a siren to sound for 5 seconds. My electronics is so rusty, and everything I've re-taught myself lately has revolved around using a stamp of some kind to control things even a 1st year Electronics student should be able to do!
Please can someone just point me in the right direction, I should then be able to figure something out...
Many Thanks,
Morrolan
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Flying is simple. You just throw yourself at the ground and miss.
"I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image."
Stephen Hawking
I've suddenly found a need to create a simple circuit without a stamp, but my brain has gone on holiday! I require a circuit that involves a button and a buzzer. Once the button is pressed, (momentary push, no need to hold it) I want a siren to sound for 5 seconds. My electronics is so rusty, and everything I've re-taught myself lately has revolved around using a stamp of some kind to control things even a 1st year Electronics student should be able to do!
Please can someone just point me in the right direction, I should then be able to figure something out...
Many Thanks,
Morrolan
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Flying is simple. You just throw yourself at the ground and miss.
"I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image."
Stephen Hawking
Comments
Try a 555 timer with a couple of appropriate resistors and caps.
Regards,
Bruce Bates
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Programming can't be all that difficult, it's nothing but 1's and 0's
http://www.parallax.com/Store/Accessories/Sound/tabid/164/CategoryID/38/List/0/Level/a/ProductID/482/Default.aspx?SortField=ProductName%2cProductName
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PLEASE CONSIDER the following:
Do you want a quickly operational black box solution or the knowledge included therein?······
Try this.
Twisted Pair....
Post Edited (Twisted Pair) : 3/7/2008 3:18:17 AM GMT
Did you get what you needed ?
Twisted Pair....
If the buzzer only needs·to sound for approximately 5 seconds just wire a
capacitor up in parralel with a buzzer as shown in the attachment.
When the pushbutton is pushed it will charge the capacitor and sound the buzzer.
However, when the pushbutton is released all the current will flow through the buzzer.
The duration of the sound will depend on the size of the capacitor.
Note: It may be best to try this on a breadboard first. Experiment with different capacitor sizes.
Other note: This circuit will only work with buzzers that don't require frequency input eg. buzzers like
Radioshack Catalog #: 273-080 or Radioshack Catalog #: 273-057 these buzzers should be nice and loud.
Final note: Make sure you don't hook the buzzer up backwords.
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Never give up,·Never submit to the seemingly invincible enemy.
However in the diagram the capaitor is a 1000uf capacitor.
That was an error, and you do need something much bigger.
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Never give up,·Never submit to the seemingly invincible enemy.