Posts Tagged ‘Electronics’

DC motors (Part 3)

Part 1, 2, 3 Now that we managed to get rid of (most of) the spike generated by the opening the supply line of the motor, let’s look at this plateau which happens just after the spike. From the pictures in the previous post, we have been able to observe that the voltage of this […]

DC motors (Part 2)

Part 1, 2, 3 Time for code ! Let’s write a few lines of trivial code in order to drive our controller (Check previous post). You probably heard about the analogWrite() function which is very convenient for generating PWM. Well, we will not use it ! Is it because it is too easy ? It […]

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 […]

Last minute Xmas present… a storage box!

Time for tidying up my bench ! As electronic components are getting smaller and smaller, the need for suitable storage boxes emerges. Here is the description of an original storage cupboard that I designed for SMDs as well as for very small mechanical parts such as watches spare parts. Here is the picture captured from FreeCad that I […]

Random number generator (Part 2)

Part 1, 2, 3 Here is a noisy signal sampled at 100 kHz with an Arduino UNO. The signal has 8 bits of resolution and the divider bridge of the final amplifying stage has been set so that the ADC range matches (without exceeding) the input signal range. Here is the illustration of a vector of 1024 […]

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 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 stepper […]

Tips and Tricks (Part 26)

Previous T&T Building a tracking device is no big deal for the Arduino enthusiasts. All you need is an Arduino board (e.g. a UNO), a GPS shield and a GSM shield. Too bad, we have a problem here because of the pin-out of the shields. The GSM shield uses pin 2 and 3 for the Rx and […]

analogRead alternative (Part2)

Part 1, 2 Starting from the presentation of the parametric version of an alternate analogRead function, here is a lean version of the whole code. The header section of the code /* Sampling parameters */ uint32_t _interval = 200; /* Interval between two consecutive ADC reading cycles */ uint32_t _lastTime; Next comes the ‘setup’ routine […]

MicroFAN (Part 2)

Part 1, 2, 3 Let’s talk about some basic electronics. MicroFAN is really easy and requires few affordable electronic components: a 12V fan, Arduino (Uno, Nano, etc.), a 8×2 LCD (a 16×2 LCD will do the job too), a rotary encoder, typically a 30 pulse 15 detents per round (so as to say 1 cycle per […]