Eurorack DIY: Buffered Multiple Build video

This video covers how to build the Buffered Multiple.
You can find all of my designs on my GitHub:
github.com/tki...
Some modules that I have designed myself are available in my Tindie shop:
www.tindie.com...
Thank you for watching!
#eurorack #synthdiy

[@MeeBilt]

Link to Tindie for this product:
www.tindie.com/products/tkilla64/buffered-multiple-eurorack-module-full-kit/

[@channelite]

cool I need to get one of these

[@MeeBilt]

There are plenty in stock right now 😉

[@AnalogDude_]

What opamps did you use? if they are based on inputs that use transistors, like LM324 or LM321 a voltage follower need a resistor in the feedback, also the inputs should be grounded with a resistor otherwise the outputs will have some random voltage if nothing is plugged in. Even done good, taking every into account it still can output a small random but static voltage.
I made mine is 4hp dual, 2 x 4, using 10 x PJ302M spaced 20mm vertically and bi-color leds.

[@sabamacx]

The look like LM321s but the boards are populated already with surface mount resistors.

[@MeeBilt]

Yes, it's LM321s

[@AnalogDude_]

@@MeeBilt That's what i thought on seeing their size on your pcb's, i got a few of them as well but i didn't knew they where so tiny.
the NE5534 is a semi high end op amp, also transistor based, a example circuit in datasheet shows voltage follower configuration with 10k. the lm321 is pnp based a load on the output could pull it out of wack.

[@AnalogDude_]

@@MeeBilt TL074(k or m) or so is a tiny variant of the TL074. like 3/4 x 3/4 mm. it's also a different datasheet.