Free Online Schematic Drawing Tool

2n2222 Switch by Holger lunaandhill At L+H we are very proud of our denim collection and we couldn’t be happier to add Levi’s Vintage Clothing and Levi’s Made & Crafted to the shelf among our other rad lines Nudie Jeans, Naked and Famous, Unbranded, Mother Denim, and United. Levi Strauss & Co. or simply Levi’s was founded in 1853 when Levi Strauss came from Buttenheim, Bavaria, to San Francisco, California to open a west coast branch of his brothers’ New York dry goods business. In 1873, Levi Strauss and tailor Jacob Davis received a U.S. patent to make the first riveted men’s work pants out of denim: the first blue jeans were born! It is hard to believe that Levi’s iconic riveted denim jean was introduced over a century ago. Since then, Levi’s has periodically tweaked the fit, fabric and features of the 501 Jean to suit the needs and preferences of the modern worker. Luna + Hill is very proud to introduce the 1947 501s to the shelf. We will be adding more from each of these Levi’s collections into the fall season.

Solenoid, Door Bell, Electromagnet Solenoid Make an electromagnet to move a plunger, then use it to make a door bell and a launcher (electric catapult). Introduction: You have already made electromagnets with iron cores and examined their magnetic forces. Problem and Purpose: Make an solenoid (electromagnet with moving plunger) and use it as a door chime and a launcher. Construction: Get a 2" (5 cm) tube and wind 40 feet (12 meters) magnet wire around it in a way that about one foot (30 cm) wire remains unwind from each end. Make a door chime Make an electric Catapult

Mélanie Lesbats Iris est un travail que j’ai pu concrétiser pour la manifestation annuelle de la Nuit des Chercheurs. L’association Connaiscience m’a donné les moyens financiers ainsi que le contact d’un scientifique, Henry Reboul chercheur au GRAAL . L’association Kawenga m’a proposé un atelier sur Montpellier pour réaliser ce travail. La forme du prisme rappelle celle de sculptures minimales. En guise de source lumineuse, j’utilise un projecteur de diapositives. Imprimer : Calcul de la section des câbles électriques en 12V Je ne sais pas si les cosses soudées à l’étain sont interdites en automobile, mais je suis bien certain que les industriels ne le font pas par simple raison économique : en dehors de toute considération de fiabilité cela leur coûterait bien trop cher ! [mode HS on]En restant dans l’industrie automobile il y a un exemple célèbre : comment Citroën s’est fait griller sa célèbre 2CV par la 4L de Renault ? La 2CV avait un châssis nécessitant énormément de soudures, contrairement à la 4L avec sa carrosserie auto-porteuse... [mode HS off] Pour revenir dans le sujet du choix des sections des câbles il y a une similitude entre les constructeurs modernes de bateaux et l’industrie automobile : Le prix de revient ! En pratique, une batterie neuve est capable de délivrer une intensité sous une certaine tension. Toujours en pratique, il suffit souvent de doubler la section des câbles du circuit de démarrage pour doubler ou tripler la durée de vie utilisable de la batterie !

2N3904 A 2N3904 in a TO-92 package on a breadboard (lower left) Another 2N3904 The 2N3904 is a common NPN bipolar junction transistor used for general purpose low-power amplifying or switching applications. The type was registered by Motorola Semiconductor in the mid-sixties, together with the complementary PNP type 2N3906, and represented a significant performance/cost improvement, with the plastic TO-92 case replacing metal cans. It is designed for low current and power, medium voltage, and can operate at moderately high speeds. This transistor is low cost, widely available and sufficiently robust to be of use by experimenters.[1] When looking at the flat side with the base pointed downward, the three wires emerging from the base are, left to right, the emitter, base and collector leads.[2] It is a 200 mA, 40 volt, 625 milliwatt transistor with a transition frequency of 300 MHz,[3] with a minimum beta or current gain of 100 at a collector current of 10 mA. References[edit] Further reading[edit]

MOC / TRIAC + Ardunio I used a MOC3011 and a Q4015 TRIAC to use my Arduino to blink a few Christmas light strands. I did this a few months ago, yet never posted it here... The MOC is a optoisolator in a way, as it seperates the arduino from the high voltage 110v circuit. It is also used because the arduino doesn't have the power to directly drive the TRIAC. There are two different configurations: resistive (ex LEDs) or inductive (ex a motor). The symbol for the TRIAC is a little weird, so make sure to check the datasheet for which pins are which. One thing you should note is that the MOC3011 doesn't have zero point detection, so unlike the MC3041, it cant do PWM based fading correctly correctly due to flickering. Code: #define LedPin 7 int OnDly; int OffDly; void loop() { OnDly=analogRead(A2); OffDly=analogRead(A3); Serial.print(OnDly); Serial.print(", "); Serial.println(OffDly);

systeme de son sphere | OBJETS UNIQUES Construisez vous même votre système sonore sphérique, et vivez une nouvelle expérience auditive. Unique et insolite, fabriquez vous un objet de décoration fonctionel. Simple a construire, il fera le meilleur effet dans votre salon ou dans votre salle de jeux. Prenons par exemple deux récipients en plastique de type rond et profonds (gros saladier par exemple), bien choisir sa couleur, sauf si on est prêts à peindre… Il nous faut aussi bien entendu un système de son prêt à l’emploi. pour cela on peux tout accheter dans un magasin spécialisé (baffles, filtres, eventuellement ampli et connectiques), dans ces magasins les vendeurs sont de très bon conseil. Donc, une fois la partie « sonore » réglée, passons à la réalisation. Les deux récipients une fois collés ensembles doivent créer une sphère. Dans la mesure du possible, chaque moitié devra comporter le même nombre de baffles. A l’aide d’une scie ou autre, faire des trous pour faire passer les baffles. Une autre idée sonore petite et facile

KMtronic LTD: RS485 Serial controlled Eight Channel Relay Board - 12V Home :: RS485 :: RS485 8 Channel Relay Controller, 12VDC, RS485 BUS ID: 01, Relays: 1-8 Features: - ID: 01 - Relays from 1 to 8 - Can be connected up to 32 to one PC COM Port (NOTE: if you need to connect more relay boards to one RS485 BUS - all boards must have different ID number) The complete includes: - One RS485 to 8 Digitally Outputs controller (12V) - One 12VDC RELAY board (12V) - 10PIN flat cable approximate 5cm length Required power: 12VDC / minimum 400 mA. Dimensions: Relay board : 120mm / 80mm / 20mm RS485 controller : 40 mm / 60 mm Communication Parameters: 8 Data, 1 Stop, No Parity Baud rate : 9600 Commands: Relay 1 commands: OFF command : FF 01 00 (HEX) or 255 1 0 (DEC) ON command : FF 01 01 (HEX) or 255 1 1 (DEC) Relay 2 commands: OFF command : FF 02 00 (HEX) or 255 2 0 (DEC) ON command : FF 02 01 (HEX) or 255 2 1 (DEC)...... ...Relay 8 commands: OFF command : FF 08 00 (HEX) or 255 8 0 (DEC) ON command : FF 08 01 (HEX) or 255 8 1 (DEC) RS485 BUS exsample: Additonal information

PowerSwitch Tail II A power cord that switches 120vac power directly from a microcontroller I/O pin (3-12vdc, 3-30ma) "The easiest way to control an AC device with an Arduino, Raspberry Pi, Beaglebone or any other DIY controller." *** Either unit can be field rewired for normally open (NO) or normally closed (NC) operation. Soldering required. *** No exposed 120vac voltages and no dangerous 120vac wiring required.Plugs into standard 120vac 3-prong household outlets, power strips, and extension cords.Eliminates the exposure of hazardous voltages in DIY projects, classrooms, and on development workbenches.No special 120vac wiring when deploying new products and custom solutions. 5300vrms isolation from the 120vac circuit.

Using Relays with Arduino – Turning on the Lights Warning!!! This project deals with AC electricity which is dangerous if you don’t know how to treat it safely. You must treat electricity with caution. Microcontrollers are good at controlling small devices, but frequently we DIY-ers want to use them to control things that aren’t so micro. The first thing you need is a cheap extension core that you are willing to cut in half. I spliced the relay into the black wire on my power cord. The last step and the one that makes this project useful is getting the microcontroller to control this relay. In this circuit the transistor acts as a switch and it allows you to turn on the relay. The cost to build the circuit below should be under $15 dollars and half of that is for a cheap extension cord. The code to run this was amazingly simple since the transistor and relay make turning on the extension cord as simple as turning on or off an LED. Credits