Op Amp As Zero Crossing Detector And Comparator Trainer is an SSI India product in the OPERATIONAL AMPLIFIER TRAINER category. Key specifications include SKU: POA-E626. TECHNICAL SPECIFICATIONS: Power Supplies. Dual DC Power Supply IC Regulated +15V DC, 150mA. DC Power Supply0-10v, 250mA. Operated on Mains power 230V, 50Hz +10% Components