Wear her heart on your sleeve.

Why should BJTs get all the credit?

This is the question Ladyada (a.k.a., Limor Fried of Adafruit) asked me (as guest of Open Music Labs) back in 2003. Horowitz and Hill had introduced the world to Transistor Man, and we made shirts for our friends with him on the front and the 741 op-amp guts on the back. "Thanks Transistor man!"

The original designs for the Transistor man shirt.

But where are the thanks for Mosfet girl? There are far more MOSFETs in the world compared to BJTs. Trillions of Mosfet girls worldwide keep our processors running by maintaining their drain current with respect to the gate voltage. Where’s her shirt?

That’s a nice shirt!

Thanks, we think so! We’re offering two shirt styles - a Unisex and Women’s fit. Check out the the sizing charts below to see what fits you best.

There are two color combinations: a black shirt with white ink or a blue shirt with yellow ink.

WOMEN’S SHORT SLEEVE TEE

This popular style is made with 100% Airlume combed ring-spun cotton and features a longer body length and short sleeves. The Bella+Canvas 6004 has a feminine fit and a crew neck.

Notes: Try checking the measurements on a shirt that you already own. For Chest, measure across chest from armpit to armpit, 1 inch below the armholes. For Body Length, measure starting at the HPS (High Point Shoulder); if the shirt is laid flat, this is usually near where the tag is on the collar.

UNISEX JERSEY TEE

This classic style is made with 100% Airlume combed ring-spun cotton and features a longer body length and short sleeves. The Bella+Canvas 3001 unisex has shoulder taping and a crew neck.

Notes: Try checking the measurements on a shirt that you already own. For Chest, measure across chest from armpit to armpit, 1 inch below the armholes. For Body Length, measure starting at the HPS (High Point Shoulder); if the shirt is laid flat, this is usually near where the tag is on the collar.

You can also check the original sizing chart for Bella+Canvas shirts for more information.

We’re using a local, high-quality printer (Pacific North Press) in Portland, Oregon.

Front Detail:

Back detail:

Supporting local non-profit ChickTech

One of the main goals of the Mosfet girl shirt is to raise awareness of the awesome women who are essential to making our tech go, and to encourage girls to get involved in the next generation of electrical discoveries. To this end, a percentage from every Mosfet girl shirt sale will go to ChickTech to support their mission to "engage women, girls, and non-binary individuals of all ages in the technology industry while working to create a better technology culture for all".

Continued sales

And, as is true with every Open Music Labs venture, the work will be made available to anyone to use for private or commercial ventures. We just want to see Mosfet girl out in the world. To this end, the shirts are being sold at cost, and neither Open Music Labs nor Adafruit received any money from this project. Click on the above images to download the design for your own use.

The initial funds to produce these shirts came from a campaign run on this site. After the campaign ended, Crowd Supply ordered shirts to continue to sell through this page. A portion of each shirt sale is still donated to ChickTech. The shirt price includes enough margin to cover the shipping, ongoing maintenance, and cost of production.

Why Mosfet and not MOSFET?

Good question! MOSFET is an acronym for Metal-Oxide Semiconductor Field-Effect Transistor, which describes a little bit about how the transistors are made, and how they work. But, in this case, Mosfet is a person’s name, so just the first letter is capitalized. Also, stylistically, the all-caps MOSFET would stick out like a sore thumb on the back.

What’s up with the work-dress and clipboard?

In keeping with the Transistor man parallel (milkman outfit and letter), we wanted a bit of an anachronistic 1940s feel. We tried to envision her as someone who joined the workforce during WWII, akin to Rosie the Riveter, another symbol of female empowerment.

Why Mosfet girl and not woman?

This was a difficult decision, and came down to three reasons:

1. One of the main goals is to appeal to the younger generation, so they can see a place for themselves in electrical engineering and computer science.
2. This is the original name as Ada conceived it, so it sort of just stuck.
3. Girl was preferred over woman by the female engineers we asked.

Thanks

This project would not have been possible without the ideas, suggestions, and encouragement of Ada and W0z (Amanda Wozniak), and I am grateful to both of them for their support.

Shipping & Fulfillment

The shirts will be shipped to backers using Crowd Supply’s fulfillment service, so parcels will be shipped to backers from their warehouse in the USA. Delivery within the US is free. Delivery outside the US will incur a surcharge during checkout. For more information, please see Crowd Supply’s guide on ordering, paying, and shipping.