Posts Tagged ‘Hardware’

Wire as you think

I was used to build my prototypes on strip-boards, burning my fingers, loosing my nerves and making many wiring mistakes because of the mirroring effect. And then came the illumination ! As I was visiting the R&D plant of my former division in Palo-Alto I observed engineers using breadboards to design yet pretty sophisticated devices. […]

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 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 […]

Stepper Motors (Part 7)

Part 1, 2, 3, 4, 5, 6, 7 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 motors […]

User Interface (Part 5)

Part 1, 2, 3, 4, 5 I brought several improvements since the introduction of the early design of a simplified however yet powerful human interface. Among them the possibility to display variables that the user can change and variables or constants that the user cannot change. Thus the introduction of a new set of menu types: /* Menu types */ […]

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 […]

Cool stuff of the day

My daughters played a lot with their “Polly Pocket” in their young ages ! An endless perspective of gaming nicely packed in a hand palm format. Which translates into this portable lab case… in the the Arduino’s world ! Isn’t it cute ? More on the Arduino UNO Portable Lab Case >here<

SG90 servo (Part 1)

Part 1 Many robotic applications feature servo-motors. Most from these servos are used as is, sweeping a +/- 90° angle from an idle position. To the cost of few mods and two SMD resistors, a standard servo can be converted to a continuous rotation mode. I will cover this mod later on. What makes servos very popular […]

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 […]