SevenFortyFun, a transistor level op amp kit
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README.md

SevenFortyFun

SevenFortyFun, a transistor level op amp kit. [ OPEN ANALOG ]

KICKSTARTER CAMPAIGN!

Most importantly go read about the inventor of the 741 - David Fullagar - at the links below:

What's in this repo?

To run LTSpice simulation download LTSpice (http://www.linear.com/designtools/software/) and then:

  • View SevenFortyFun Simulation.asc
  • Click RAW
  • Copy to notepad (or your favorite text editor)
  • Save as .asc making sure 'save as type:' is selected to 'All Files'
  • Make sure encoding is ANSI
  • Open with LTSpice

or just download the whole thing as a zip...

INSTRUCTIONS FOR INSTALLING COMPONENTS:
_______________________________________

TRANSISTOR FOOTPRINT

  • Install as silkscreen shape suggests be careful with pnp/npn type

PINOUT OF HEADERS

  • 1:offset null
  • 2:Inverting Input
  • 3:Non-inverting Input
  • 4:V-
  • 5:offset null
  • 6:Output
  • 7:V+
  • 8:NC

TODO

  • Make datasheet & characterize SevenFortyFun (i.e. slew rate, GBW, etc...)
  • Unify diagrams in the PDF/Make them look pretty
  • Edit out "ideal diode" comment in PDF with the more factual reality of a diode connected transistor - to obtain a very low leakage diode. For example, a 3904 type transistor will have <1pA of reverse leakage using the Base Emitter
    junction.



Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.