PedalPCB's Pendulum Harmonic Tremolo

[cjonesplay]

Happy New Year, everyone!

PedalPCB is out of stock of this great and simple harmonic tremolo at the moment, but I highly recommend them for PCB's. I have built this and it works great, although I'm waiting on better LDR's. The speed goes from semi-slow to super fast, covering all the ground in between.
There is a schematic here

Please note:  The top TL074 is upside down! Don't forget:)