In a previous post, I talked about the MCP23017 and MCP23018, and why the MCP23017 was a better device for my use in this case (this case being my Remote control K9). The MCP23017 can only output a digital high of the same voltage as VDD, which is capped at […]
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In my previous post, I talked about some of the advantages of the MCP23018, and how it was easier to address… Well, it turns out that I made the standard mistake of not reading the datasheet… It’s not as though the MCP23018 obscures the lack of current source deep in […]
The MCP23017 is a popular I2C 16bit IO module, it can be used to allow you to have more GPIOs available, There is also the MCP23018 available, which does fundamentally the same as the MCP23017, but with a few differences: On an I2C bus, each device has a unique address, […]
When you spend any time more involved with vehicles than reading a Haynes manual at some point you will need to know what someone means by KL31 in regards to automotive wiring for 12 V vehicles. ‘KL’ is the abbreviation for ‘klemme’ which is the German term for connector/connection, or […]
In the United Kingdom, if you want to place a product on the market you need to ensure that you have a CE mark, this is fundamentally the same as the now deprecated UKCA mark. The CE mark will allow you to sell in Europe. Please see this post about […]
Capacitors are used to “Store electrical energy” along with Resistors they make up two of the fundamental components used in electronic circuits. An ideal capacitor should have neither inductance nor resistance. Capacitors – Use Capacitors are used in several different ways in electronic circuits: Charge and Voltage A capacitor is […]
First, we are going to cover some basics in this case Resistors, but, to do this we are going to tell some lies, if you know what the lies are, then chances are that you don’t need to read this post… but please do anyway. Resistors’ values are measured in […]
My name is Philip McGaw, as you may be able to deduce from the Mc part of my last name, I am likely of either Scottish or Irish heritage, This is something my father should at some point cover over on McGaw.eu. My last name is McGaw, which is supposed […]
Sometimes I need to create and model my own KiCad components for use in my component library. For example, I found some cheap small microswitches on AliExpress that I am looking to use in SwarmBot, however, there was no existing KiCad Component in the library. I found an identical switch […]
In the UK there is a free monthly magazine called Hackspace magazine, in Issue 4 (March 2018) magazine Archie Roques builds an IoT tea machine. using a mains powered kettle and some relays. One of my main objections to this article is the switching of mains current without clearly laying […]
Every so often we see online stories of a “fake” phone charger burning down a home or giving people electric shocks. Normally these phone chargers are referred to as ‘Apple’ or ‘iPhone’ chargers, however, that is just because the small triangle chargers (in a variety of colours) are so prevalent. […]
I picked up two L298N Stepper Motor Driver Controller PCBs from Hobby Components for my K-9, to go with the two 24 V / 4.5 A Parvalux motors I acquired. The L298N Stepper Motor Driver Controller Board from Hobby Components has the following specifications: The L298N can supply 2A per channel […]