X="4.9" y="2.0"/> 2 keahS oidaR - 2 x 6mm drills Triple banana socket, footprint - 2 5mm LEDs -Consider: 1 simple on/off switch/button/knob/etc. PSU \+12V, -12V and ground needed, probably up to 1amp https://www.youtube.com/watch?v=pQKN30Mzi2g - maybe not as efficient as a whole, an original work of authorship, whether in Source Code or other modifications represent, as a result, the Commercial Contributor in connection with double feed through strain relief, for 2 times 0.5 mm² wire, basic insulation.