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BackLEDs: One per step, to set output voltages. (10 One multi-pole rotary switch - 7mm, with 3-4mm extra space available - mini toggle switch ON-ON Push button switch, normally open, two pins, 45° tilted D Momentary Switch, single pole double throw | | | S3 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TO-99-8"/>