Nick Johnson over at Arachnid Labs wants to giveaway a few decks of circuit patterns trading cards. Each card has a schematic and short description of a common circuit pattern in electronics. Topics covered include digital, analog, and power electronics.
He’ll give these away to 3 random commenters, just leave a comment on this post with a circuit pattern you’d like to see explained on a card and win a deck!
Here’s a few example cards. The ubiquitous resistor divider, of course:
capacitative voltage doubler, from power electronics:
If digital’s more your style, there’s the SR latch: