Moonshot LDR

Locrian99

Locrian99

Well-known member
Anyone tried the gl5528 instead of the 5516 in the moonshot. I swear i had some but either i used em all or they found the parts blackhole.

Difference is 10-20k light resistance vs 5-10k.

Edit: sorry, compared it to the 5516, I’m trying it… just can only compare it to a demo when I’m done
 
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You'll be fine. This circuit is pretty slutty, it'll get along with just about anything. The advantage of rolling your own is that you can adjust the distance and angle of the LED/LDR combo to balance the response, unlike a vactrol which is fixed.
 
Like Betty I've had good luck tweaking LDR orientations and gaps to dial in some tremolos.

Just make sure you solder them floating up off the board a bit so you can bend to adjust without having to desolder anything.
 
Also, measure and sort your LDR's. A big bag of 5516's will have a lot of variance.
Measure the light resistance, dark resistance and speed of recovery.
 
MichaelW said:
Also, measure and sort your LDR's. A big bag of 5516's will have a lot of variance.
Measure the light resistance, dark resistance and speed of recovery.
Click to expand...
Why? Do you measure and sort other components with broad tolerances, like pots? How would you even implement this knowledge? No commercial builder cares, why should you?
 
Betty Wont said:
Why? Do you measure and sort other components with broad tolerances, like pots? How would you even implement this knowledge? No commercial builder cares, why should you?
Click to expand...
But your sister does right? :ROFLMAO:

I started doing it because I found some duds (like way out of spec) LDR's in a batch. So if I'm home rolling an opto for say a compressor that has certain specs I want to make sure the LDR I use spec's in the correct range. Come to think of it, it's really only optical compressors where it makes the biggest difference.
 
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