Hi! love the cards,had a look through them all and ordered a DS lite touch screen+adapter for about 3 dollar:)
Could you label what the pins do on the DS touch screen? X+, X-, Y+ and Y- ? or wiring?
Anyway! In order, with cards being tagged in [ ] brackets:
You might want to add the term "Pull up resistor" to [pushbutton to GND] and
"Pull down resistor" to [pushbutton to 5v]
In [Pushbutton to 12v], i think the text bubble for the capacitor could read "Add a capacitor to reduce interference" , no plural needed?
In [Optocoupled input] you might want to add states for the IN pin, like you did with Pushbutton to GND
In [Connect a CT sensor] ,You could change the title to Non-invasive current sensor
In [A vibration sensor] Can you use those small black buzzers?
in [Connect a IR sensor] , I've used IR sensors but never needed the resistors
In [Infrared emitter] the diode is the wrong way around, cathode and anode need to be flipped.
Love what you are doing! Keeping these on my thumbdrive as extra lookup info and printed several of your pinouts and hung them on my walls