Category Archives: Electronics

A Tin Can Robot – Roundup

I put together a project roundup for the tin can R2D2: TinCan R2D2 roundup

A Tin Can Robot – Android App to Control

Finally I got around hacking a basic Android App to control my tin can robots. To quickly get a result, I used Processings Android mode and the Ketai library for the Bluetooth stuff. Regarding the effort needed for the results, they turned out pretty well. The App has the following features so far: Device Discovery […]

A Tin Can Robot – The Idea

Since R2D2 from StarWars is very popular with my kids these days,  I started working on a tin can robot which looks something like R2D2 and is remote controllable through a Android device (cell phone, tablet, ..). The body is made from a can which originally was for coffee. As you can see in the […]

Simulate Circuits Online

PartSim is a online circuits simulation. It allows one to draw and simulate schematics in your web-browser: PartSim includes a full SPICE simulation engine, web-based schematic capture tool, and a graphical waveform viewer.

CadSoft Eagle Tutorial Videos

Jeremy Blum is about to post a series of CadSoft Eagle Tutorial Videos. I think they are very well done and easy to follow. Thus, if you are about to learn Eagle, they might come in handy.

LTs Switching Regulator Circuit Collection

As noted on dangerousprototypes.com, Linear Technology provides a nice application note containing a circuit collection for almost all power supply needs: Battery, Boost, Buck, Buck-Boost, Flyback, Forward, High Voltage, Multioutput, Off Line, Preregulator, Switched Capacitor and Telecom. Download the application notes as PDF from LT

Multiple Time Bases on a Single MSP430 Timer Module

On dangerousprototypes.com, they refer to an other interesting TI app-note which describes how to use multiple time bases on a single MSP430 module: However, in some applications, multiple time bases are needed to generate multiple output frequencies. Normally this is done using multiple timer modules, but this might require upgrading to a part with many […]

Simple RS232 to TTL Level Converter

This webpage describes how to build a simple RS232C level converter using transistors.

Interfacing the 3-V MSP430 to 5-V Circuits

On Dangerous Prototypes, they point to an app-note from TI which shows various ways of level-shifting between a 3V MCU (like the MSP430) and 5V peripherals. The paper includes various examples for input, output and bi-directional level-shifting. They also cover the topic power-supply, giving examples on how to provide both: 3V and 5V to your […]

Finally: E-Big Jake

Today was the day where we decided, that E-Big Jake was ready for a ride. We checked the tractor with a throttle of 1/3 of what is possible. This resulted in  a child friendly 5km/h speed. We also gave a throttle at 2/3 a try, and we got a speed of about 15 km/h. I […]