Labels:text | screenshot | font | line | number | parallel | black and white | diagram OCR: Press any key to quit. RCA or PHONO PLUG. RG58 or UR76 COAX. PROBE. Connecting cable for the TTL Logic Probe project. (C) GOLCU. BRAID. CROC CLIP. Body of old ballpoint pen: Brass screw and nut for tip File a point on the tip of the screw to make the probe. CONSTRUCTION OF THE PROBE.