New Project: Driving MAX7219 Serial LED Matrix with OLIMEXINO-85

Olimexino 1

MAX7219 is simple serial shift in/out with LED driver. In this project Mr. Paolo PerCdS demonstrates how 8×8 LED matrix can be driven serially with OLIMEXINO-85

sent via Olimex.com Project page.

Clean install of Arduino IDE for OLIMEXINO-85 boards

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via Olimex Projects page

Paolo PerCdS posted new project how to make clean install of Arduino IDE and add OLIMEXINO-85 board in the IDE.

 

New KiCAD OSHW PCB project – Breakboard for ADS1220 Low Power 24-bit ADC

BB-ADS1220-1

ADS1220 is four channel 24-bit precise Sigma-Delta ADC with these features:

  • Low Current Consumption 120 µA in Duty-Cycle Mode
  • Wide Supply Range: 2.3 V to 5.5 V
  • Programmable Gain: 1 V/V to 128 V/V
  • Programmable Data Rates: Up to 2 kSPS
  • Up to 20-Bits Effective Resolution
  • Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS with Single-Cycle Settling Digital Filter
  • Two Differential or Four Single-Ended Inputs
  • Dual Matched Programmable Current Sources: 10 µA to 1.5 mA
  • Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
  • Internal 2% Accurate Oscillator
  • Internal Temperature Sensor: 0.5°C (typ) Accuracy
  • SPI-Compatible Interface (Mode 1)

The PCB is made with KiCAD and files are uploaded on GitHub with Apache 2.0 Licensee.

Software examples how to use BB-ADS1220 with OLIMEXINO-32U4 (Arduino Leonardo) and A20-OLinuXino-MICRO are available as reference.

Apple ][ emulator with Arduino-Uno, this is insane!

arduino

Damian Peckett did something which I would initially think it’s impossible to implement. He made Apple ][ emulator with Arduino-UNO.

How is this possible? Apple ][ had 48 K of RAM but Arduino has only 2K of SRAM? Well he emulates just the video RAM and for BASIC there is just 1K memory, so not the complete memory map is available, but still good proof of concept.

He is generating VGA video signal and use PS2 keyboard. As you can see on this video the emulator is working:

http://static.dpeckett.com/apple/stream.mp4

Now if I had some more time to port the code to processor with 48K or more RAM … would have complete Apple ][ on chip and play Karateka 🙂

PIC32MX220D Code Generator Project

PIC32

Few days ago Antonio Leite sent me this e-mail:

Dear Mr. Tsvetan Usunov

A few weeks ago I purchased a board PIC32-Pinguino-MX220 and started working on it.

As I was new to PICs 32 microcontrollers, I started searching code and samples on the internet, besides reading the user manual and the library pdf to have the minimum code to make a led to blink and understand how this pic32 family works.

I started thinking that lots of people must overtake the same boring tasks before having the board fully functional.

Then I started writing an application that generates code automatically for me and my colleagues. The application was a success and everybody started saying that Olimex should be interested in this application.

I am sending a pdf that I would like Mr Usunov to have a view and see if this kind of application has some interest for Olimex.

I am attaching a project so that it can be open on the MPLABX environment. The files .c and .h generated by the application are ADCDrv, CoreTimerDrv, GPIODrv, PWMDrv, UARTDrv and configurator.xml.

To connect the board to the computer I used a USB-Serial-Cable-F

Best regards

Project files are available here.

Project description is here.

On this video you can see how it works:

 

 

Three New Projects sumbitted: Telescope controller and Olimexino-85-kit build and SOS transmitter

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We got three new Projects submitted on our web Project section

Home made Telescope controller

How to Build Olimexino-85-kit

Olimexino-85 sends SOS signal

 

New Project: Using A20-OLinuXino-MICRO as framegrabber with easyCap

fgrabber_big

Armando Basile submitted interesting project with A20-OLinuXino-MICRO to our Project section. He is using A20-OLinuXino-MICRO and easyCap framegrabber together to capture pictures.

You can see his project in action on the video below:

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