Category Archive: Informational

Jun 01

Best Kept Secret

Yes, it is an ambiguous topic. No, I don’t think it should be hidden, however, the fact that this topic does not seem to garner much press could mean it has been a best kept secret. The “best kept secret” is the programming language Forth. For reference, take a look at “A  Beginner’s Guide to …

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May 22

How to convert an STM32F103C8T6 into a Black Magic Probe

There are several tutorials on the internet showing how to convert an STM32F103C8T6 into a Black Magic Probe. Unfortunately, none of them worked for me. So, I decided to write this post in case others run into the same problem as I did. The problem I ran into was the memory size of the STM32F103C8T6 …

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Apr 13

ARM Cortex M3 STM32F103C8T6

It’s amazing what you can get in a microcontroller board these days for just over $2. For example, just search ebay.com or alibaba.com for the key word ‘STM32F103C8T6’.  You will see the links to an ARM Cortex M3 STM32F103C8T6 development board for just over $2 US including shipping (usually from China, so it may take …

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Feb 12

PIC Assembler Coding

PICKit2 Clone Programmer

I became re-interested in Microchip PIC assembler coding recently. I hadn’t really used it for a number of years (since before 2009). The ‘C’ language is usually efficient enough and easier to code for most projects I do. I used one of my DIY PIC18F4550 Pinguinos for experimentation. As you might guess, I decided to …

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Jan 25

DIY Arduino Shield

An Arduino shield is basically another circuit board that plugs into the Arduino and extends its capabilities in some way. So, of course, if you create your own DIY Arduino, you have to create a DIY Arduino shield. I needed a way to attach an HD44780 LCD to my DIY Arduino so I created a …

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Dec 24

Updated DIY Arduino Uno

I have a new version of my DIY Arduino UNO. It is somewhat different than the old one that I have written about before (HERE).  I moved some components around on the board, added the user LED and moved all the wiring to the bottom of the board. Here is a picture of what it …

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Nov 24

Experimenting with Arduino-Builder

Arduino IDE

Lately, I have been experimenting with Arduino-Builder. It was been available as a command line interface to compile sketches since version 1.6.6 of the Arduino IDE.  It is actually what the Arduino IDE invokes behind the scenes to compile the sketch. It is written in the Go language. The source code is available HERE on …

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Nov 10

An ATmega328 with two Identities

Arduino as an ISP

Some would say that an ATmega328 with two identities is not possible. However, it depends on who you ask.  🙄   First though, before we ask, here is some necessary background information. Microcontrollers from Atmel (AVR) and Microchip (PIC) have a built in ‘signature’ or identity. This signature is a unique code that identifies its …

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Nov 07

If you have the time

The arduino does not have an RTC (Real Time Clock). However, it is trivial to add one.  And if you have the time, you can do a number of interesting things with your arduino, limited only by your imagination. I am using the DS1307 RTC module which looks  like this:           …

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Sep 07

Flashrom and an Arduino at 3.3V

Flashrom is an amazing piece of software and a life-saver when you need it! If you’ve tried to update your BIOS before using manufacturer supplied software and something went wrong, then you know how valuable Flashrom can be. I’ve written about Flashrom and the BusPirate in a previous post HERE. However, I just found out …

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