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Old 4th May 2005, 07:36 AM   #1
hau is offline hau  Philippines
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hi

im planning to build a multichannel pre-amp and I'm looking for a optical rotary encoder, it is not important if it is new or second-hand as long it is in perfect working condition.

since i don't have creditcard or paypal, im trading my pair of lm3875 gainclone kit, or some of my devices, i have(12pcs of opa627BP, 9pcs opa637, 2pcs PIC16f877 and 2pcs PIC16f84.

im also looking for other devices that you think i can use for my project (LCD/VFD, connectors, etc)

Please make an offer, thanks for looking....
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Old 4th May 2005, 12:11 PM   #2
hau is offline hau  Philippines
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another picture
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Old 4th May 2005, 12:57 PM   #3
hau is offline hau  Philippines
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sorry about the quality of the pic's it was taken using the camera of a cellphone
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Old 4th May 2005, 08:43 PM   #4
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Hi, how many pulses per turn ?
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Old 6th May 2005, 07:18 AM   #5
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hi

about 128 cycles per revolution.
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Old 7th May 2005, 10:00 AM   #6
hau is offline hau  Philippines
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hi

im thingking about any cycles, i just really need a optical encoders right-away. im begging, please help me finish my project.

thanks, i beg you please reply!.......
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Old 7th May 2005, 01:05 PM   #7
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Hey, I will look if I can help.
Have anything to trade ?
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Old 7th May 2005, 02:31 PM   #8
hau is offline hau  Philippines
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hi

look at my first post if you like those devices, if not tell me what devices you want, i will see if i have the devices you need.

and by the way tell me if you have other devices you think is suited for the digital pre-amp

thanks a lot !.........
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Old 9th May 2005, 11:52 AM   #9
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anyone? please
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Old 9th May 2005, 12:47 PM   #10
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Look what I have found

Sticker is a little scratchy but device is ok. shaft diameter is 3,14mm, attached cable about 50cm long, foutr holes for mounting with screws. M2,5 or M3, did not try.

100 pulses per turn per channels A & B and one per turn, channel C.

Supply 12V gives cmos compatible signal 4V high level.

I look for PCM52 ceramic dip and DAC71-CSB or COB ceramic dip.
But as you probably may not have any of those I might be interested in any interesting DAC chips or OPA627, make me an offer.

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