Op Amp As Summing, Difference, Average And Scaling Amplifier is an SSI India product in the OPERATIONAL AMPLIFIER TRAINER category. Key specifications include SKU: POA-E078. TECHNICAL SPECIFICATIONS: Power Supplies. Dual DC Power Supply IC Regulated +15V DC, 150mA. Fixed IC Regulated +5V DC, 150mA. DC Power Supply IC Regulated 0-12V