The 70s and 80s saw the rise of LEDs, photodiodes, and optocouplers.

1001 Electronic Circuits (by Newton C. Braga, TAB Books / Prompt Publications)

: If you have a broken piece of vintage gear, there is a high probability that a similar circuit topology exists within these 1,001 examples to help you diagnose the fault. Conclusion

: Includes useful reference materials such as base diagrams for popular ICs, a list of IC substitutions, and a pictorial guide to common electronic symbols. Reader Reviews and Sentiment