- 2 momentary pushbutton switches 1 rotary switch, 5+ positions 10 LEDs - 6 sockets Potentiometers: One potentiometer per step, to set output voltages. (10) - One potentiometer per step, to set output voltages. (10) One potentiometer for internal clock rate (if onboard clock is used // 11 SPDT switches (many used as SPST - 2 x switching (normalling) stereo jack (T/R/S), https://www.neutrik.com/en/product/nj3fd-v 6.35mm (1/4 in) Vertical Jack, Non-switching stereo jack (T/R/S), https://www.neutrik.com/en/product/nj3fd-v 6.35mm (1/4 in) Vertical Jack, 3 x 3 mm, 0.5 mm pitch, ultra thin fine pitch quad flat package (http://www.st.com/resource/en/datasheet/stm8s003f3.pdf ST UQFN 6 pin 0.5mm Pitch (http://www.ti.com/lit/ds/symlink/lm4990.pdf.