# Which LDR's for DIY vactrols?

**URL:** <https://lookmumnocomputer.discourse.group/t/which-ldrs-for-diy-vactrols/5257>\
**Category:** DIY STUFF\
**Created:** [July 5, 2022, 2:31pm UTC](https://lookmumnocomputer.discourse.group/t/which-ldrs-for-diy-vactrols/5257 "2022-07-05T14:31:10Z")\
**Posts on this page:** 1\
**Showing post:** 16

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**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\
**Post date:** [September 15, 2023, 9:03pm UTC](https://lookmumnocomputer.discourse.group/t/which-ldrs-for-diy-vactrols/5257/16 "2023-09-15T21:03:10Z")

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1. There’s some more discussion of DIY vactrols in the My Build Progress topic starting here:

> [@My build progress](https://lookmumnocomputer.discourse.group/t/my-build-progress/345/5912):
>
> Finally got around to testing these things. Conclusion, they suck. [image] I tried out a bunch of different LDRs and LEDs. Here’s the best combo I could find, vs that same combo in a shrink tube DIY vactrol, vs a VTL5C3 from Thonk. The lens passes too much background light at low current, and loses too much light at high currents. I’ll be sticking to shrink tube.

1. I put some information on vactrols and LDRs up on a page on my website:

> **[Vactrol information](https://www.richholmes.xyz/topics/synth/vactrol-information/)**
>
> Wallpaper paste must be good for something

Might add more later.

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_[View the full topic](https://lookmumnocomputer.discourse.group/t/which-ldrs-for-diy-vactrols/5257)._