Archive for the ‘Power supplies’ Category

Current generators (Part 1)

Part 1 Here starts a new series of post dedicated to current generators. As usual, the idea is to describe working experimental prototypes that feature few components and quite good performances. Current generators can be found in various applications such as battery chargers (advanced ones, aka multiple stages or intelligent battery chargers), LED drivers and […]

Switch Mode Power Supplies (Part 2)

Part 1, 2, 3 Next picture illustrates the principle of operation of my proposal for an arduino controlled Switch-Mode Power Supply (SMPS): Instead of using an integrated chip, we will use arduino as a controller. The basic configuration requires an output line to drive the switch and two analog inputs for reading the voltage from the current […]

Switch Mode Power Supplies (Part 1)

Part 1, 2, 3 This is the begining of a series of posts dedicated to an original subject that I had in mind for sometimes now. After few attemps, I decided to share my early design which might drive us up to building a versatile lead-acid battery charger. The aim of these posts is not […]

DC-motors (Part 1)

Part 1, 2, 3 DC-motors are every where in many form factors, many performances and configurations. The aim of this series of posts is not to cover all aspects of DC-motors as there are so many publications available, most of them being of excellent quality. Firstly, I will concentrate on the most common brushed DC-motors . Next […]

Ultrasonic scanner (Part 2)

Part 1, 2 Most of the electronic diagram shown here should look familiar to the readers of arduinoos posts. The ultrasonic sensor is added to what was described as the test bench for stepper motors. Here is the list of the required components: An Arduino UNO baord (Should I introduce it to you ?) A […]

Stepper Motors (Part 7)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 This post is about driving stepper motors. In the previous posts I described the various components involved in motorized assemblies featuring stepper motors. However, putting all these nuts and bolts together may lead to unexpected results. In my case, these defects where related to the use of […]

Power Supplies (Part 1)

As long as you want to blink leds, everything’s fine with the power supplied by the USB cable. Here is a nice clean shield which could help you in fulfilling most power supply requirements.   The input voltage must lie in the 4.5 et 35 V range, and its output swings from 1.25 to 12V under 3A. It […]