DIY AVR Graphical LCD test board

Once I’ve got several HQM1286404 graphical LCD displays around so I decided to build a prototyping board where I could easily plug LCD to it, read data via ADC and display graphs, plug keypad if needed for some menu functions. Earlier I was testing graphical LCD on prototype breadboard, but dealing with multiple wires (GLCD needs 20 of them) resulted in many failures. It is OK to do simple tasks, but more serious applications require more stable platform. So here it is: This type of GLCD is standard 128×64 pixel matrix controlled by KS0108 LCD controller. Ones I have comes with smaller non common pin-header where pins have 2mm step, so I had to draw it for Eagle library which you will find in project files. I decided to make very simple circuit so it could fit in 100x50mm single sided PCB. As base MCU I used Atmega16 which can …

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Build Piconomic Atmega128 development board by yourself

Earlier I have written about Piconomic learning course and its nice development board they provide. You can purchase the board if you are from a South Africa internationally for $49.99 + $9.37 airmail shipping with a tracking number, which takes 2-4 weeks, depending on custom delays. Of course there is good opportunity to build this board by yourself. They allow to build a development board for free only for personal use by using their Protel 99 SE project files. So I decided to build one and now it is standing on my table and blinking blue led. First of all I have ordered to make PCB by using milling-drilling plotter. Of course I could make board by myself, but i wanted to save some time and nerves in case of errors. After one week my board was shipped to me:   The I bought all parts needed. Just one thing …

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