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For schematics and .ino file uses an 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 or even much less. - One idea: add a switch to disable reset (run once). - Momentary-normal-off pushbutton to manually reset. LEDs: One per step.

DDPAK TO-263 D2PAK-3 TO-263-3.
8.134764e-001 3.495383e-001 facet normal 0.976244 0.096218.

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