BrownDogGadgets

Thanks! It should be fixed now. :)

We mention that in our PDF instructions here: https://browndoggadgets.dozuki.com/Guide/Cardboard... "Knife switches are not used for most modern day circuits as they have been replaced by switches that are safer at high voltages, but since we’ll be working with low voltage circuits this DIY cardboard knife switch is perfect!"We can add that disclaimer here as well. (Thanks!)

We are using these for low voltage / low current circuits only. These are used with paper circuits to teach basic electronics and circuitry, typically to children.

Amazing project! Great presentation!

Just for fun and because it's been on our list of projects to make for YEARS. It's one of those projects we wished we'd always had in our own classrooms or museums, but never built. It's also VERY easy to build in a variety of formats. We're going to build a Disney themed one for one of our employee's kids as well as a Green Bay Packer themed one for a friend's kid. Seriously, what kid wouldn't want to have their own sound wall??!?!?!?

我们强烈建议不要使用铜箔胶带。相反，使用尼龙导电带。对于孩子使用的更容易，可以弯曲和折叠，不可能打破，并且可以轻松地进入更广泛的织物表面。（是的，我们卖掉了自己的尼龙胶带，叫做制造磁带，但是也是如此的几家公司。）我们在棕色的狗小工具总是乐于向任何教师或图书管理员发送一个免费的尼龙导电胶带样品。你也可以希望为免费纸质电路项目和活动添加一些链接，例如browndoggadgets.com，chibitronics.com和makerspaces.com。

We're going to try and expand this project into a Harry Potter sorting hat later this year. It would make for a nice halloween activity.

You should try using some of our nylon based Maker Tape. We literally designed it to fit on top of and between LEGO studs for our LEGO based circuitry kits. If you'd like we can send you a roll of it to try out. It would be a lot easier to work with in your project that copper foil... especially if you ever want to get things back up again. Message us and we'll send you some.

You should both check out the open source Crazy Circuits line. It's literally Snap Circuits on LEGO, using custom PCBs and nylon conductive tape. We even did a write up on how to design your own components to get made up.

Thats a really well thought out idea. I often see teachers needing stuff like this but being unable to afford commercial products. Kudos.