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BackAn LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on either internal or external clock sources cycle between 0v and 5v max // gate out (j4/j10) // clock in (j2/j11 // casc out (j14/j15 // reset/casc in (j1/j13 // gate out // RESET in // GATE out - Gate stops working after a new version of the.
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