Here is a nice new shield for the Arduino. This Audio Shield allows you to record and playback audio using the popular Winbond ISD4003 chip. One thing that looks like it was a bit of a pain was having the 3 volt Windbond chip to interface to the 5 volt Arduino. Windbond ISD4003 datasheet (PDF). "The Voice Shield™ (VS) is an analog audio shield for the Arduino that allows
NerdKits has put together a video that describes how a LED row/column matrix is wired. This comes in handy when you have limited pins and need to control lots of items. Another popular method is to use a serial to parallel latch. "This project makes use of row-column addressing, which lets us control lots of LEDs without having one wire going to each one. We also use one
The next phase of the Suzuk-E has been completed , it is focused on the Suzuki Electric Bike Motor Rebuild. The result is a three fold increase in power! “The objective for the purposes of the Suzuk-E project is to lower the no-load RPM of the motor and increase it’s torque. This typically would be accomplished by winding more turns of lighter wire into the same physical space available. In
This Household AC Power Monitor idea is similar to what I have wanted to do for years. Jason Winters has taken two clamp meters and connected them to both phases of his house electrical panel. This allows him to monitor the entire electrical usage of his house. He is collecting data and creating a spreadsheet to monitor usage over time. What I was thinking of doing was to install
Stephane Melancon (DoctorBass) sent in a very compact battery pack that he uses to jumpstart his car. There are lots of systems that can be purchased that can produce the same results however none of them can fit into your jacket pocket! "In this video i finally decided to show you how IMPRESSIVE are these A123 cells. During the test, when the starter ran for about 2-3sec, the current
Technology will come and go, if you can come up with a good idea for the dying technology you may be able to create some cool toys on the cheap. That’s the case with pen plotters, from what I have seen most are being phased out and replaced with large roll inkjet printers. Steve invested some time and effort finding an old large format plotter, converted it into a
Next time you are building a project and find a component running a bit hot you may want to look in your pocket for a few pennies to solve the problem. This Penny Heatsink idea is a nice idea since I can think of a number of times that I have bolted on expensive heatsinks when I only needed a bit of heat dissipation but a large heat sink
