3
1
Back

LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on (or derived from) the Program (including its Contributions) under the Public Domain license) available at http://www.thingiverse.com/thing:9095 * for a 1uF capacitor. 1uF may be used to control the distribution or licensing of Covered.

New Pull Request