Help identify this compoment...

I

Impmon

Guest
It is part of recently released Gameboy Advance game called Boktai.
This compoment is some type of sensor (called Sun sensor) that is used
to "recharge" a weapon in the game. After some trial and error, it has
been determined certain type of UV light worked the best.

Picture of the mystery compoment up close:
(bottom, the side facing light to function)
http://personalpages.tds.net/~wilykat/boktai/bottom.jpg
(top, solder side)
http://personalpages.tds.net/~wilykat/boktai/top.jpg

There are 3 leads on the compoment and 2 of them are labeled as K and A,
which suggest some type of diode. Both of the leads goes to a compoment
labeled as TLV272 (T272C on the chip). The 3rd lead doesn't appear to
connect to anything at all. Any idea exactly what compoment is that and
is there a technicial spec somewhere on the internet I could use to find
more about this sensor.
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To reply, change digi.mon to tds.net
 
Hi,

Impmon wrote:

Seems to be a photodiode. The component name "PD1" points in this
direction also.

HTH
Wolfgang
 
Hi

Seems to be photo diode, the component name "PD1" and the
markings A and K also point in this direction....

HTH
Wolfgang
 
On Fri, 17 Oct 2003 12:34:29 -0400, Impmon <Impmon@digi.mon> put
finger to keyboard and composed:

It is part of recently released Gameboy Advance game called Boktai.
This compoment is some type of sensor (called Sun sensor) that is used
to "recharge" a weapon in the game. After some trial and error, it has
been determined certain type of UV light worked the best.

Picture of the mystery compoment up close:
(bottom, the side facing light to function)
http://personalpages.tds.net/~wilykat/boktai/bottom.jpg
(top, solder side)
http://personalpages.tds.net/~wilykat/boktai/top.jpg

There are 3 leads on the compoment and 2 of them are labeled as K and A,
which suggest some type of diode. Both of the leads goes to a compoment
labeled as TLV272 (T272C on the chip). The 3rd lead doesn't appear to
connect to anything at all. Any idea exactly what compoment is that and
is there a technicial spec somewhere on the internet I could use to find
more about this sensor.
Click to expand...
FWIW, the TLV272 datasheet can be found here:
http://www-s.ti.com/sc/ds/tlv272.pdf

It appears to be a low voltage, dual rail-to-rail op-amp with CMOS
inputs suitable for high-impedance sensor interfaces, so the
suggestion that your mystery component is a photodiode appears to be
correct.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
In article <2BXjb.8$7D6.371865@news.salzburg-online.at>,
wolfgang.mahringer@sbg.at mentioned...
Hi,

Impmon wrote:

Seems to be a photodiode. The component name "PD1" points in this
direction also.

HTH
Wolfgang
Click to expand...
I agree. However, it has three leads, so it's possible that it's a
phototransistor. There is a chance that they labeled it PD1 but used
a phototransistor instead of a photodiode, either to confuse someone
trying to copy it, or else as an upgrade or engineering change.

But its probably a photodiode. It looks dark like silicon, so it's
probably silicon.

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