Basic Question Regarding This Component (pir)
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Basic Question Regarding This Component (pir)| pepsimax007 |
Posted: December 26, 2009 12:21 am
 
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Newbie  Group: Members+ Posts: 34 Member No.: 26,232 Joined: September 16, 2009  |
Hi, I just bought: http://www.sparkfun.com/commerce/product_i...roducts_id=8630 What I want to do is to connect this to a PICAXE 14 chip. Im a beginner in electronics, so I was hoping someone could explain to me what the following means in an A-B-C language 
Does this mean that I have to connect power to the PIR. Add a resistor between the PIR board, and my PICAXE chip ? ...What exactly is a "pull up resistor" ? And can I solder directly onto a PICAXE chip, if im done programming it ? Please explain very basic  This post has been edited by pepsimax007 on December 26, 2009 12:30 am |
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| kellys_eye |
Posted: December 26, 2009 01:13 am
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 Forum Addict ++ Group: Spamminator Taskforce Posts: 8,447 Member No.: 2,735 Joined: June 21, 2005 |
Connect a resistor (1000 ohms will do) between the output of the PIR and the positive supply rail of the PICAXE circuit. Connect the negative of the PIR to the negative of the PICAXE. Connect the output of the PIR to the input port of the PICAXE. Connect power to the PIR. Connect power to the PICAXE. Job done. -------------------- May contain nuts
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| pepsimax007 |
Posted: December 26, 2009 01:20 am
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Newbie Group: Members+ Posts: 34 Member No.: 26,232 Joined: September 16, 2009 |
Is this drawing correct, ... according to what you described?  I added numbers to the drawing so that you can easily explain what needs to be altered. This post has been edited by pepsimax007 on December 26, 2009 01:59 am |
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| GPG |
Posted: December 26, 2009 03:36 am
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 Forum Addict ++ Group: Spamminator Taskforce Posts: 5,103 Member No.: 792 Joined: April 25, 2004 |
http://sharesend.com/v26vm
Pin 3 to 5-12V unless the internal regulator is bypassed. |
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| kellys_eye |
Posted: December 26, 2009 01:43 pm
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Forum Addict ++ Group: Spamminator Taskforce Posts: 8,447 Member No.: 2,735 Joined: June 21, 2005 |
No, the 1000 ohm resistor should go between 5 and 1.
Point 5 also connects to point 6. And the PIR (as GPG mentions) needs a minimum of 5V - this can be a separate supply if necessary but you then need to connect both supply negatives together -------------------- May contain nuts
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| pepsimax007 |
Posted: December 26, 2009 04:29 pm
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Newbie Group: Members+ Posts: 34 Member No.: 26,232 Joined: September 16, 2009 |
Do you mean like this?  Since you disagree in the previous poster whom draw up a circuit. The PIR can run on 3v if it has the proper jumper-settings enabled. This post has been edited by pepsimax007 on December 26, 2009 04:30 pm |
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| pepsimax007 |
Posted: December 26, 2009 07:04 pm
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Newbie Group: Members+ Posts: 34 Member No.: 26,232 Joined: September 16, 2009 |
Never mind I just realized that both of you had the same solution Thank you both for your help. |
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| MikeGyver |
Posted: December 27, 2009 06:57 am
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 Forum Addict Group: Trusted Members Posts: 604 Member No.: 12,151 Joined: December 05, 2007 |
3V is the minimum that a picaxe can operate on. If your battery dips below that it will shut off. You're better off running it from 4.5v (3 cells, or 1 lithium ion cell), and ideally from 5v. Also 3v is not enough to successfully reflash with a computer.
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