Electronics > Electronics
50$ robot photoresistor
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razvanc_roro:
Can someone tell me what value is the resistor from the photoresistor used for the 50$ robot?
340ohm resistor
OR
1.62Kohm resistor
Thank you!
TravelingPencil:
when i built the 50$ robot i used a random one from the assortment that i got at radio shack.
ed1380:
the 1.62k.
you could have easily found out, by using the color code guide and the pics.
iCopyright_Everything:
Hi guys,
Firstly, DO forgive me if by any chance I have duplicated a question here but I have searched the forum for this and come a-cropper...
I am in the UK & totally new to Robotics. For the $50 robot, I CANNOT order from Radio Shack (US only)
So what I need to know please is the properties of a good photoresistor to use for the $50 bot. Let me copy n paste what Ive found for it in british websites (light dependent resistors -- bloody british electronics companies dones even seem to HAVE the WORD Photoresistor in their lexicon!)
"
CHARTLAND
Order Code: 7482280
Manufacturer Part No: N5AC501085
RoHS :
Description
* Light Dependant Resistor
* Resistor element type:Light Dependent
* Wavelength, spectral response peak:650nm
* Series:NG
* Resistance, @ lux A:100kR
* Voltage rating, DC:100V
* Case style:Radial
* Depth, external:4.6mm
* Diameter, lead:0.5mm
* Length / Height, external:3.2mm
* Length, lead:34mm
* Power dissipation:50mW
* Resistance, @ lux A max:100kR
* Resistance, @ lux A min:50kR
* Resistance, dark:5MR
* Temp, op. max:60?C
* Temp, op. min:-30?C
* Wavelength, peak:550nm
* Width, external:5.3mm
"
-------end of quote------
Is this appropriate?
PLEASE advise me ASAP as Ive ordered all the other stuff. Thanks!
Admin:
--- Quote ---So what I need to know please is the properties of a good photoresistor to use for the $50 bot.
--- End quote ---
As far as the $50 robot is concerned, if it looks similar to the one in the pictures, it will work fine for what you want.
There are only two concerns with any photoresistor:
1) response time - dependent on size and quality of the photoresistor
2) change in resistance wrt light absorbed
A browse at the datasheet should be able to tell you if it is acceptable.
Looking at your posted specs, that photoresistor looks acceptable to me.
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