Arduino LED brightness control over Processing slider

After watching Ardunino documentary, one project really stuck into my mind. Rockwellgroup is a company expertise in  interactive installation having 40+ years of experience. They used Arduino in very unique way to interface over ethernet shield with projection arrangement. I started working on the same for upcoming August Fest and TEDx Hyderabad.

While exploring SpaceBrew, which is an open source initiative of Rockwellgroup, I thought to tweak with some example codes. I made this beginner level testing which controls the brightness of LED with processing slider movement. Source code is available at the end of this post. Continue reading


STM32F3 Discovery interface with LCD JHD162A

LCD is another most important debugging tool and proper interfacing of this module is much important for any beginner or expert. I have chosen JHD162A LCD, because it is the cheapest and widely available in the market. For a detailed overview of LCD and technological aspect behind it, please follow this link
Sequencing of events for initialization of LCD is very important to keep in mind while working with LCD. I am using minimum hardware for realizing the interface. The component required are-
1. STM32F3 Discovery
2. JHD162A LCD (Soldered header pins)
3. Jumper wires (16 pieces)
Please follow the steps for interface: Continue reading

STM32F3 programming and debug using SWO

This post will guide you through steps to print values from any part of the program. This functionality will allow the user to debug the code easily and doesn’t need to add any extra hardware like LCD. Working with serial monitor eases the process of development and quite helpful in experimentation.

I am working on STM32F3 Cortex M-4 board in IAR workbench environment. I hope the user has prior knowledge of how to configure the workspace and write the basic program. This link is helpful in understanding the basic things to get start with basic steps and run your first blink program. Only needed some library name modification which is not difficult for a logical person. 🙂 Continue reading

Arduino Offset printer page counter

My brother’s Offset printing machine was giving him trouble counting pages. There is voltage stabilizer connected to protect the machine from voltage beyond 110V. Whenever printer shut-off due to voltage fluctuation the counter of machine goes to zero again. This situation irritates him, as remembering pages is not easy while printing 1000-2000 pages at a time.

This picture shows four 7-segment displays connected that can show maximum number of 99999 pages. Continue reading