Copyright ©2018 Queenidog - All Rights Reserved
I have about 1000 circuits in a binder I started in 1982, most of them culled from magazines and books and most of them hand-drawn! The early circuits below were drawn using Protel Schematic and are just a sampling of what's available and what I've done. (I've built hundreds of circuits.)

In 2010, I scrapped most ideas using integrated circuits like CMOS and TTL and instead now use Microchip PIC MCUs (micro-controller unit) for all new projects. Easier to write software than doing it in hardware.  I've also started using Arduino products because they are so plentiful and tons of software available.   Raspberry Pi is my next move.

Hovering over on an item describes the project, selecting the item takes you to that page.  (maybe just a schematic or photo)

I shut down the Christmas Display in 2002, after 20 years,  and only have one display item operational at my new address (2017). Click on the link above to see what I did have: 5800 lights, 3 computers, 12 relays, 14 motors
Christmas Light Display