00:00Fix limited GPIO with these MCP23017 expanders script.
00:05Running out of pins on your Arduino or Pi?
00:08One chip fixes that.
00:1116 extra GPIOs, over just 2 I2C wires, and you can stack up to 8 of them.
00:17I dug through the listings and found the best MCP23017 deals out there, so let's go through them.
00:23First up, the seller with the most proof behind it.
00:27Nearly 5,000 sold, 4.8 stars, and it's the standard DIP28 MCP23017E-SP, so it drops straight into a
00:35breadboard or a socket.
00:37At $2.24 it's not the cheapest, but it's the safest pick if you just want one chip that works.
00:43For a first build, this is the one I'd grab.
00:47Next is the value play.
00:49Same genuine MCP23017E-SP, but this listing lets you buy 2-10 pieces, and you can pick DIP or SOP
00:57package depending on whether you're breadboarding or soldering to a board.
01:00It starts at $3.90, has a perfect 5-star rating, and with almost 4,900 sold, people clearly keep
01:08coming back.
01:09Buy 2, wire 1 up, keep 1 spare.
01:12Third one sits right in the middle.
01:15Single DIP28 chip, $2.59, 4.7 stars, over 4,000 sold.
01:22Nothing flashy here, just a consistent seller with a solid track record.
01:26Good middle option if you want a single unit from a listing with a long history behind it, and you're
01:31not chasing the lowest price.
01:34Fourth is where it gets interesting.
01:36$1.84 for one chip, and it holds a perfect 5-star rating across more than 4,000 sales.
01:43That's the kind of listing you don't expect to find.
01:47Same MCP23017E-SP, same 16IO, same I2C interface.
01:52If you want the best rating at a low price, this is the sweet spot.
01:57So there you go.
01:59Cheapest is the last one, best rated is the fourth, and the safest bet for a single chip is the
02:04first.
02:05All the links are in the description below, so pick the one that fits your build.
02:10If this saved you some pin headaches, hit like and subscribe, and I'll see you in the next one.
