optocoupler in uglyface

[Br4d13y]

can a tlp521-1 be used in the place of a vactorol? i am trying to make just one order form from futurlec.

[GibsonGM]

you have to find the specs for each device, and compare. Look for similar 'dark resistance, light resistance'.  You can Google the parts sheets. 

[oldrocker]

I made one using the large yellow LED and an LDR with a max 200k resistance from Radio Shack and shrink tubing.  Listen to my sound clips on Basic Audios sound samples website.
http://www.mrdwab.com/john/soundclipspage.html

[soggybag]

You can pretty use anything for this.

In my opinion the best results come from using an LDR with a fast response time. The best sounding part for me has been the VTL5C9. But these cost about $7! Which makes this part the most expensive part of the project.

The VTL5C9 is an LED/LDR package. There must be cheaper alternative, but I have yet to find it.

[FisTheGoon]

hi everyone.i just want to know what is the resistance range of the ldr which is suitable/good for this fx? 
i did mine and the reading around 2Mohm when the led on.thanks

[LucifersTrip]

I ordered 5 of these:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270591343718&ssPageName=ADME:L:COSI:US:1123

They charged me $3 shipping so that'd be < $3 each ppd.  A good deal if they work well (I read somewhere that they did).
...and you will have them quickly.

Ironically, I haven't tried em yet because I have been waiting nearly a month and a half for my Futurlec order that has one more part I needed to build it.

good luck