Category Archives: EMSL Projects

A single sided circuit board

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Mobius Circuit - 21

In electronics, it is common to talk about single sided circuit boards. The most common type is a circuit board that only has printed wiring on one side, and components on the other side. There are also surface-mount boards, where all the wiring and components sit on one side. But aren’t all of those reallyjust two-sided circuit boards where you only put components on one of the sides?

Here we present a method of making your own authentic single-sided circuit board.
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A tale of two Meggies

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Connected
The Meggy Jr RGB has an open serial port that– thus far– hasn’t been used much for gameplay. Something was missing, which turns out to have been this cable that can hook two Meggy Jr’s (Er, Meggies?) together.

Even neater, this cable can be used to provide serial connections between any two of most types of Arduino-compatible devices that normally are programmed through a FTDI USB-TTL cable. This includes not only Meggy Jr RGB, but also the Arduino Pro, the current-revision LilyPad Arduino and the DC Boarduino. (Note: BBB and RBBB users: You can play too, once you wire up CTS# to ground.)

And the cable itself? You can make it yourself– in a couple of minutes– from a standard cable that costs about a buck. :)

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Small Parts Tray made from Contact Lens Cases

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Parts Tray-6


Contact lens cases make great small parts containers. They are designed with curved ridged sides to allow easy retrieval of small slippery things. They have watertight seals, guaranteeing that your parts won’t fall out. With a bunch of cases, a little hot glue and a mounting surface, you can have a cheap, reliable, easy to use storage system.


Parts Tray-14

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Programming Meggy Jr RGB

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Last week we released an Arduino environment library for the Meggy Jr RGB. The code is an open source project here, and the downloadable package comes several example programs, ranging from very simple to moderately complex. (One of the examples is a new game called Froggy Jr, where you help your a little round green frog cross the street and then a river.)

Today, to make it all a bit more useful, we are releasing the Meggy Jr RGB Programing guide, which you can download Here (600 kB PDF file).

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