Posts Tagged ‘Arduino’

Retour vers le futur

Allez, zou, pour une fois voici une publication en français ! Cà fait un moment que çà me grattouillait le clavier de composer dans ma langue maternelle, et je vois au moins deux bonnes raisons de faire une entorse à ma politique de publication. Soyons réalistes, l’anglais est une langue universellement comprise par les technophiles, […]

FN-M16P (Part 2)

Part 1, 2 As seen in the previous post, the MCU (e.g. arduino) and the module are talking each other through a serial communication (UART) at a quite modest rate of 9600 baud. Data is exchanged as packets of 10 bytes according to the following structure: Byte# Function Value Comments 0 Start Byte 0x7E constant 1 […]

FN-M16P (Part 1)

Part 1, 2 How come I managed to miss this fancy little module ? It’s my good ol’ friend Sébastien from Quai-Lab who showed me this little piece of electronic which he included in his inMoov robot. Bright idea ! For a few €, his robot will speak and improve its interactions to the public. […]

Metal detector (Part 1)

“Dear cousin, I lost my keys in the middle of the meadows, would you please make a metal detector for me ? Urgent !“ This is really how this project started ! More or less, as I have in mind the design of an Earth’s Field Nuclear Magnetic Resonance spectrometer which features magnetic fields sensors on […]

Switch Mode Power Supplies (Part 3)

Part 1, 2, 3 Current sensing. This part is probably the most critical and most uneasy. It is critical because current sensing will protect both the power supply and the driven load from excessive currents and thus excessive amounts of energy dissipated in both the source and the receiver. There are multiple designs available for […]

Direct Digital Synthesizer (DDS) (Part 9)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 Let’s go a few steps further in the direction of a fully featured arbitrary wave generator ! The early posts describe how to generate clean waves at various frequencies. In this post, I will explain how to offset the signal and how to attenuate it. Setting negative offsets requires… negative voltage ! Which Arduino  platforms do […]

Direct Digital Synthesizer (DDS) (Part 7)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 A recent project lead me to excavate a quite old DDS design which may be of some interest for you. Instead of using a ladder of resistors, this design features a simple, cheap and yet powerful digital to analog converter. I will later explain why I choose this particular Microchip circuit but for […]

PLD (Part 5)

Part 1, 2, 3, 4, 5, 6 HL2 PLD may be used for safety applications too. In this configuration, the PLD is able to detect movements up to 7 m away within and almost 90° view angle. It features a PIR (Passive Infra Red) sensor from Panasonic. This sensors is available in different sizes depending on the required range; the enclosures […]

PLD (Part 1)

Part 1, 2, 3, 4, 5, 6 Dear arduinoos followers, You may wonder why the production line of arduinoos went to a stall along the last weeks… Holidays ? Well it sounds reasonable and logical, however except for a few days of leave here and there (actually in Lyon, Annecy, Saint Martin des Baleines and Val-Andre) during summer time this is not […]

Stepper Motors (Part 9)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 Let’s go back with an easier application. Still for my friend Valerio, the puppets magician, who built this adorable model-phonograph: It is all wooden made and powered by… a stepper motor, using the electronics which has been described in previous post and showed again here A switch […]