Easyvibe Photocells

[spoontex]

Hello,

I've have some NSL-19M51. They are good voy an EasyVibe build? I need to do some modifications?

https://www.digikey.es/product-detail/es/advanced-photonix/NSL-19M51/NSL-19M51-ND/5039794?utm_adgroup=Optical%20Sensors&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Sensors%2C%20Transducers&utm_term=&productid=5039794&gclid=CjwKCAjw95D0BRBFEiwAcO1KDJFA-AzW3UdFtW1o9E6koHcvRgYLo3hGy3PbTcZio2gg_sOH4uW4hhoCesAQAvD_BwE

Thanks

[Kevin Mitchell]

The drive trimpot should compensate in LDR variances. Dial to taste.

-KM

[spoontex]

But, they are better ones than others?? or doesn't matter at all?

Thanks!!

[Kevin Mitchell]

But, they are better ones than others?? or doesn't matter at all?

Thanks!!

They have a lower dark resistance compared to the LDRs I've used but to compensate you should only have to lower how bright the LEDs shine - via the drive trimpot. It kind of matters because you wouldn't want something that's so out of spec it wouldn't work here. But you should be fine.

Edit: There are discussions around about good LDRs for this. I'm unsure if 100k will give you the full spectrum of the sweep but figured 100k darkness should be enough for this circuit. Perhaps someone else can expand on this.

-KM

[spoontex]

I've change for other ones ( I think that they are form an univibe project, so I don't know what type is it ), now sounds much better with more sweep.

But I've noticed that the effect is a bit trebble, how can I add some bass, or adjust this?

Thanks.

[JerS]

To increase the bass response, increase the value of the input capacitor.