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Author Topic: $50 help with electronics  (Read 15651 times)

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Offline chelmi

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Re: $50 help with electronics
« Reply #90 on: March 08, 2009, 11:38:32 AM »
okay then, arrange them like this:

GROUND
+5V
SIGNAL
okay so it doesnt matter to much as long as the +5v is in the middle because you can always flip the header around cant ye?


How do i arrange them like that???? I see 2 terminals, which one is +5v whats GND and whats SIGNAL.?

Sorry For Noobishness

Joe


http://www.societyofrobots.com/robotforum/index.php?action=dlattach;topic=3292.0;attach=2439

We are talking about sensor inputs.

blue is signal
black is ground
+5V is mauve


I know, but which wires go where???


Can you be more specific? go where on the board or on the sensors?
Did you open the document I linked? This cannot be more explicit... You have to make an effort, I wont solder the parts for you...

Chelmi.

Offline SmAsH

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Re: $50 help with electronics
« Reply #91 on: March 09, 2009, 03:13:12 AM »
here this clear it up a bit? left middle and right are how to arrange them in the molex. the resistor is the 1.6k or something one.
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Offline paulstreats

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Re: $50 help with electronics
« Reply #92 on: March 09, 2009, 10:40:39 AM »
that drawings wrong smash. Where you have the Vin wants to be the Vout(where it connects to the adc pin).

Vin and GND should be connected to the other 2
« Last Edit: March 09, 2009, 11:09:59 AM by paulstreats »

Offline Joesavage1Topic starter

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Re: $50 help with electronics
« Reply #93 on: March 09, 2009, 01:01:31 PM »
I just wanna know were i connect the wires to the terminals, then where i connect them to the board.... Vin and Vout for now confuses me, at the end of the project ill re look over it.

Thanks

Joe

Offline paulstreats

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Re: $50 help with electronics
« Reply #94 on: March 09, 2009, 01:24:43 PM »
Heres a picture. The big black thing on the bottom is the connector. plug the wires into it in that order.

black     = GND
red wire = +5v
yellow    = Vout / signal

When you plug it into your board the yellow wire wants to go closest to the microcontroller (connects to the adc pin)

« Last Edit: March 09, 2009, 01:26:44 PM by paulstreats »

Offline SmAsH

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Re: $50 help with electronics
« Reply #95 on: March 09, 2009, 01:29:29 PM »
isnt that what mine says? please clear up how mine is wrong. mine has +5v in the middle? or was my writing wrong?
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Offline paulstreats

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Re: $50 help with electronics
« Reply #96 on: March 09, 2009, 01:33:26 PM »
The Vout should be from between the resistor and photocell

Offline SmAsH

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Re: $50 help with electronics
« Reply #97 on: March 09, 2009, 01:37:16 PM »
ohhh, i thought it wouldnt matter because theyre non polarised. does the resistor somehow affect the reading?
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Offline paulstreats

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Re: $50 help with electronics
« Reply #98 on: March 09, 2009, 01:45:31 PM »
Yes. If you didnt need the resistor It wouldnt be there.

The photocell doesnt adjust the voltage, it only adjusts how much current can pass through(changes resistance in proportion to the light), the same with the resistor. The adc ports need a change in voltage so by connecting the resistor in the correct way, it causes the voltage to change depending on how much light is on the photoresistor

Offline SmAsH

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Re: $50 help with electronics
« Reply #99 on: March 09, 2009, 01:49:46 PM »
i know that but does the resistor affect the reading on the signal line, so does it matter which side is signal, resistor or no resistor?
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Offline paulstreats

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Re: $50 help with electronics
« Reply #100 on: March 09, 2009, 01:54:49 PM »
Yes, the vout/signal of a voltage divider needs to come from between 2 resistors (in this case the photocell is a resistor).

Offline SmAsH

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Re: $50 help with electronics
« Reply #101 on: March 09, 2009, 01:56:42 PM »
ok that clears things up a bit! thanks mate :D
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Offline Joesavage1Topic starter

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Re: $50 help with electronics
« Reply #102 on: March 13, 2009, 09:21:43 AM »
Ok, that clears it up for the moment (although im not even onto doing this bit yet, i was asking upfront), ill ask if I have any more questions.

Thanks Guys!

Joe

Offline Admin

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Re: $50 help with electronics
« Reply #103 on: March 25, 2009, 12:52:17 AM »
Quote
nothing is acctuly connected, there just all soldered onto the board?
yeap

 


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