Buying cheap electronics at Ebay: Part 1
This post lists some components to create a basic electronics prototyping kit, which can be bought for very low prices at eBay.
Electronics
Using a ULN2803A to control a DC motor
This post explains how to use the ULN2803A IC to control a DC motor, using an Arduino board.
Shorting a voltage source conceptual error
This post describes some conceptual errors with voltage sources, that arise from the definition of voltage source and short circuit.
Toggling a LED with Arduino and HC-06
Following the previous post describing the HC-06 module, this one shows how to use it to build a simple program to toggle the debugging LED of an Arduino board, using Bluetooth. This tutorial assumes the use of the HC-06 integrated in the baseboard described in the previous post.
Arduino Bluetooth with HC-06
This post describes the HC-06 Bluetooth module and shows a simple app to turn on and off a lamp with an Arduino board.
Resistors calculations and voltage divider
This post explains some basic calculations with resistors and voltage dividers.
Cheap power supplies
This post lists some cheap options for power supplies to use in electronic and embedded systems projects.
Voltage sources and resistors
When developing for embedded systems, having knowledge about electronics gives much more freedom on what we can create. Instead of using only shields or demonstration boards, we can develop custom solutions for our needs, allowing for a greater efficiency and a lower cost. This post explains some very basic principles about electronics, namely DC voltage …