Archive for January 2012

A Short Guide On Motor Electrical Noise Reduction

This topic is nothing new and there are already quite a few good articles on the web on this. But I thought I would try to provide a more comprehensive view on this issue and give a few concrete examples on how to filter out the electrical noise from motors in your circuits. Continue reading ‘A Short Guide On Motor Electrical Noise Reduction’ »

My Renesas Demo Boards Arrived

Last week, I received two of the demo boards from Renesas. One is a YRPBRL78G13 and the other is a RPBRX62N. The RL78/G13 promotional board features a 64 pin R5F100LEA 16-bit microcontroller, which has 64K flash ROM, 4K data flash and 4K RAM. The RX62N contains a R5F562N8BDFP 32-bit microcontroller, which has 512K ROM, 32K data flash and 96K RAM Continue reading ‘My Renesas Demo Boards Arrived’ »

Using FRAM as Nonvolatile Memory With Arduino

One of the biggest advantages of FRAM (or FeRAM, Ferroelectric RAM) over EEPROM is that FRAM has a much higher write speed and typically can operate at bus speed. This means that no delay instructions are needed when performing write operations, which greatly reduces coding complexity and increases the overall throughput. Continue reading ‘Using FRAM as Nonvolatile Memory With Arduino’ »

Interfacing MMA8453Q With Arduino

MMA8453Q is a rather inexpensive accelerometer. It is significantly cheaper than many other 3-axis accelerometers (such as the popular LIS3LV02DL) and yet it offers a reasonably high 10 bits resolution and packs a rich set of features that simplifies designs and programming in many different applications. Continue reading ‘Interfacing MMA8453Q With Arduino’ »

Insane Packaging

AVnet has so far been my most favorite parts supplier and I have used it quite a few times. Not only do they offer a rather comprehensive catalog, their prices are quite competitive as well and their shipping and handling practices are excellent — sometimes to the extreme. Continue reading ‘Insane Packaging’ »

Simple Fume Extractor Using Server Blower Fans

Breathing in fumes while soldering is not good for your health, so it is recommended that you have a fume extractor in your workshop. A typical fume extractor sucks in air and passes the fumes through layers of active carbon. While effective, it is probably an overkill unless you spend most of your day in your workshop. Continue reading ‘Simple Fume Extractor Using Server Blower Fans’ »