The non inverting summer board for the Analog Computer Confetti. A good description of the basic functionality of the summer one can find here: The Summing Amplifier.
The board has a jumper marked as V3 for using the sum of two (no jumper) or three inputs (set jumper) different inputs..

The screenshot of an oscilloscope: summing to different inputs together, a square wave plus a sine wave.

confetti704_non_inverting_summer_02.zip

• Resistors:
• 1x 33.33 kOhm
• 4x 100 kOhm
• Semiconductors
• 1x TL074 OpAmp
• Mechanical:
• 1x IC socket, 14pins
• 1x 2 pin strip
• 1x jumpers
• 4x 2 pin header, female
• 2x pin header, female 90° 1×3, 1×2
• 2x pin header, male 90° 1×3, 1×2

The Confetti704 Non Inverting Summer was designed by Wolfgang Spahn 2015-19.
It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.