enc28J60 and Arduino (10)
This quick tutorial comes from a request Antonio posted in a comment: how to change the default port the webserver is listening on.
Stepper kit for Arduino
I was looking for a cheap solution to add a motor to my Arduino and I found a kit that includes an unipolar stepper motor and the driver board.
Windows: what an account is locked by?
One of the most frustrating activities a Windows admin has to perform is understanding why an Active Directory account keeps locking: here’s a quick way to find out.
Eagle – Put components on the bottom layer
Eagle, by default, puts all the components on the PCB’s top layer, usually displayed with red color: Choose the Mirror tool: and click on your component: Eagle will move it on the bottom layer, displayed with the blu color:
Led matrix with HT1632C controller (5)
This is the last post in this tutorial and it’s about an Arduino sketch that receives a text string from the serial port and displays it on your display with a scrolling effect.
Lipo Fuel Gauge
In my recent review about the Li-po Rider module, I wrote that a little problem was the absence of a chip that could monitor the state of charge (SoC) of the connected battery. You can find several IC for that function; I chose the MAX17043 by Maxim, for the following interesting features: [checklist] it doesn’t require an external sense resistor…
MAX17043 library
I’ve just published by Arduino library to use the MAX17043; this IC can monitor voltage and state of charge of a single cell Li+ battery…
enc28J60 and Arduino (9)
After having published my previous tutorial, some users wrote me asking a way to send bigger images using Arduino and the ethernet shield. The guys who develop EtherCard library are rewriting the way it handles TCP packets, in the meantime you can get around this problem including in your HTML page references to images hosted by other websites:…
PowerLED Driver
LEDs with high brightness (high power LEDs) offer a lumens / watt ratio very higher than traditional incandescent or fuorescent lamps: This type of LED has to be driven by a constant current source: 3W LEDs have a nominal current value of 350mA. I designed a module to drive a single 3W LED and to change…
PCB Visualizer
Eurocircuits has published a useful online tool to validate your PCB projects: PCB Visualizer: After having uploaded your files (it can handle Gerber or Eagle v.6 format) you can check if everything is ok: At the moment, the tool is available if you choose one of the following PCB services: Eurocircuits : www.eurocircuits.com Elektor : www.elektorpcbservice.com element 14…