The Quad Gate uses a single quad logic chip and combines them in 4 different ways. A1 and B1 are combined and appear at OUT1. A2 and B2 are combined and appear at OUT2. OUT3 is a combination of A1 and OUT2. OUT4 is a combination of OUT1 and A2. Any standard quad logic gate IC can be used, for example 4001 NOR, 4011 AND, 4070 XOR.

+12V Current Consumption: 31mA
-12V Current Consumption: 55mA

Bill of material and schematic on LZX product page​

Attention: Castle Series printed circuit boards and EuroRack frontpanels are offered as a resource for intermediate and advanced level Synth DIY enthusiasts who are experienced with assembling thru hole electronics assemblies and sourcing electronic components.

Building DIY kits happens on your own risk. We can't do support or give a guarantee for correct function, because that depends on your own skills. Be responsible and check the building instructions before you buy. Thank you!