# Circuit Playground: M is for MOSFET ## Video https://youtu.be/SWiJcfNUYTg Hans could use some help. Luckily, Connie is here to save the day! Join them at Circuit Playground and learn how MOSFETs can use small signals to control high powered devices. - [Next Page](https://learn.adafruit.com/circuit-playground-m-is-for-mosfet/transcript.md) ## Featured Products ### Coloring book - "Ladyada's E is for electronics" [Coloring book - "Ladyada's E is for electronics"](https://www.adafruit.com/product/1000) Discontinued - [**you can grab ** Ladyada's Coloring book - "R is for Robots" **instead! **](https://www.adafruit.com/product/1936) Ladyada's "E is for Electronics" is a coloring book adventure with electronic components and their... No Longer Stocked [Buy Now](https://www.adafruit.com/product/1000) [Related Guides to the Product](https://learn.adafruit.com/products/1000/guides) ### Cappy the Capacitor - Circuit Playground Plushie [Cappy the Capacitor - Circuit Playground Plushie](https://www.adafruit.com/product/1021) [Discontinued - **you can grab** Ruby the Red LED - Circuit Playground Plushie ** instead!**](https://www.adafruit.com/product/1025) Cappy is the de facto leader of the group. He is always coming up with crazy schemes. A running joke is that his capacitance value... No Longer Stocked [Buy Now](https://www.adafruit.com/product/1021) [Related Guides to the Product](https://learn.adafruit.com/products/1021/guides) ### Hans 555 Timer IC - Circuit Playground Plushie [Hans 555 Timer IC - Circuit Playground Plushie](https://www.adafruit.com/product/1022) [Discontinued - **you can grab one of our many other Plushies instead! **](https://www.adafruit.com/?q=plushie&sort=BestMatch) Hans is the 'old man' of the group. He tends to be nervous and is often indecisive. Hans frequently changes his mind and... No Longer Stocked [Buy Now](https://www.adafruit.com/product/1022) [Related Guides to the Product](https://learn.adafruit.com/products/1022/guides) ### Connie the Transistor - Circuit Playground Plushie [Connie the Transistor - Circuit Playground Plushie](https://www.adafruit.com/product/1024) Connie is the co-leader of the group with Cappy. Connie is much more level-headed though, and somewhat of a mother figure for the others, particularly Ruby and Billie. She is very thorough, remarkably smart, and has a good heart. She is very dedicated to the others and acts as a balance to the... No Longer Stocked [Buy Now](https://www.adafruit.com/product/1024) [Related Guides to the Product](https://learn.adafruit.com/products/1024/guides) ### Mho the Resistor - Circuit Playground Plushie [Mho the Resistor - Circuit Playground Plushie](https://www.adafruit.com/product/1023) Mho has a laid-back, passive personality. He likes to do as little work as possible and prefers to simply let the world happen around him. Mho is kind of a hippie and is very quiet and gentle. He is best friends with Ruby, the red LED, who shares his idealism, though he's often... No Longer Stocked [Buy Now](https://www.adafruit.com/product/1023) [Related Guides to the Product](https://learn.adafruit.com/products/1023/guides) ### Ruby the Red LED - Circuit Playground Plushie [Ruby the Red LED - Circuit Playground Plushie](https://www.adafruit.com/product/1025) Ruby is the ingenue of the group, and something of a Pollyanna. She is the youngest, the most talkative, and gets easily excited about everything. Ruby has a lot of energy and she's always ready to go on an adventure. Ruby's wanderlust sometimes gets her in trouble. Her best friend is... No Longer Stocked [Buy Now](https://www.adafruit.com/product/1025) [Related Guides to the Product](https://learn.adafruit.com/products/1025/guides) ### Gus the Green LED - Circuit Playground Plushie [Gus the Green LED - Circuit Playground Plushie](https://www.adafruit.com/product/1026) [Discontinued - **you can grab the ** Ruby the Red LED - Circuit Playground Plushie  **instead!**](https://www.adafruit.com/product/1025) Gus is the smartest member of the group, but also the most coarse. Gus is the closest thing to an engineer in the group: he... No Longer Stocked [Buy Now](https://www.adafruit.com/product/1026) [Related Guides to the Product](https://learn.adafruit.com/products/1026/guides) ### Billie the Blue LED - Circuit Playground Plushie [Billie the Blue LED - Circuit Playground Plushie](https://www.adafruit.com/product/1027) Billie doesn't just sing the blues, she lives the blues. Billie has a good heart, but she can be a total downer. She always sees glass as half-empty (even when it's full), and doesn't like to try new things. Billie has a big-sister relationship with Ruby, and admires her... No Longer Stocked [Buy Now](https://www.adafruit.com/product/1027) [Related Guides to the Product](https://learn.adafruit.com/products/1027/guides) ## Related Guides - [Circuit Playground: Q is for Quartz](https://learn.adafruit.com/circuit-playground-q-is-for-quartz.md) - [Circuit Playground: F is for Frequency](https://learn.adafruit.com/circuit-playground-f-is-for-frequency.md) - [Glowing Lotus Flower - Electronic Origami for Beginners](https://learn.adafruit.com/glowing-lotus-flower-electronic-origami-for-beginners.md) - [Circuit Playground: L is for LED](https://learn.adafruit.com/circuit-playground-l-is-for-led.md) - [Circuit Playground - A is for Ampere](https://learn.adafruit.com/circuit-playground-a-is-for-ampere.md) - [Circuit Playground: S is for Soldering Iron](https://learn.adafruit.com/circuit-playground-s-is-for-soldering-iron.md) - [Circuit Playground: C is for Capacitor](https://learn.adafruit.com/circuit-playground-c-is-for-capacitor.md) - [Circuit Playground: R is for Robots](https://learn.adafruit.com/circuit-playground-r-is-for-robots.md) - [Circuit Playground: D is for Diode](https://learn.adafruit.com/circuit-playground-d-is-for-diode.md) - [Circuit Playground - P is for PCB](https://learn.adafruit.com/circuit-playground-p-is-for-pcb.md) - [Circuit Playground: G is for Ground](https://learn.adafruit.com/circuit-playground-g-is-for-ground.md) - [Circuit Playground: J is for Joule](https://learn.adafruit.com/circuit-playground-j-is-for-joule.md) - [Circuit Playground: B is for Battery](https://learn.adafruit.com/circuit-playground-b-is-for-battery.md) - [Circuit Playground: K is for Kits](https://learn.adafruit.com/circuit-playground-k-is-for-kits.md)