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Arduino Uno afmetingen

  1. Arduino Uno is a microcontroller board based on the ATmega328P (datasheet). It It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analo
  2. g language based on Wiring. To get it started with Arduino Uno board and blink the built-in LED, load the example code by selecting Files>Examples>Basics>Blink. Once the example code (also shown below) is loaded into your IDE, click on the 'upload' button given on the top bar
  3. The Arduino Uno is a type of Arduino board that is provided as an open-source board that uses an ATmega328p microcontroller in the board. The Arduino Uno contains a set of analog and digital pins that are input and output pins which are used to connect the board to other components
  4. The printed circuit board of the Arduino Uno length and width are 2.7 X 2.1 inches, but the power jack and the USB connector will extend beyond the previous measurement. The board can be attached on the surface otherwise case with the screw holes. Applications of Arduino Uno ATmega328. The applications of Arduino Uno include the following
  5. The Arduino Uno is an open-source microcontroller board based on the Microchip ATmega328P microcontroller and developed by Arduino.cc. The board is equipped with sets of digital and analog input/output pins that may be interfaced to various expansion boards and other circuits. The board has 14 digital I/O pins, 6 analog I/O pins, and is programmable with the Arduino IDE, via a type B USB cable. It can be powered by the USB cable or by an external 9-volt battery, though it accepts voltages betwe

Arduino Uno Pinout, Specifications, Pin Configuration

The technical specifications of the Arduino UNO are listed below: There are 20 Input/Output pins present on the Arduino UNO board. These 20 pis include 6 PWM pins, 6 analog pins, and 8 digital I/O pins. The PWM pins are Pulse Width Modulation capable pins. The crystal oscillator present in Arduino UNO comes with a frequency of 16MHz Arduino Uno Pinout - Digital Pins. Pins 0-13 of the Arduino Uno serve as digital input/output pins. Pin 13 of the Arduino Uno is connected to the built-in LED. In the Arduino Uno - pins 3,5,6,9,10,11 have PWM capability. It's important to note that: Each pin can provide/sink up to 40 mA max. But the recommended current is 20 mA Arduino Uno is the ideal board for getting started with electronics, through fun and engaging hands-on projects. This board is your entry to the unique Arduino experience: great for learning the basics of how sensors and actuators work, and an essential tool for your rapid prototyping needs. Arduino Uno Rev3 is the most used and documented board in. The UNO is the most used and documented board of the whole Arduino family. Arduino Uno is a microcontroller board based on the ATmega328P. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header and a reset button The simplest Arduino LCD clock ever designed. Only needs an Arduino UNO, a 1602 LCD, and two buttons. No resistors, no potentiometer

Make connected devices easily with one of these IoT products and open your creativity with the opportunities of the world wide web. These boards are compatible with the Arduino Cloud which allows to collect data in dashboards, control devices from a mobile app and update firmware over a network connection Arduino Uno board is the best choice for the beginners. The Arduino Uno is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button Arduino pin 13 (named as WATERPUMP in code) is used to turn on and off the transistor. According to the code to control the speed of the motor we need to enter a value between 0 and 255 in the Serial Monitor. I used 200 value for the speed of the motor Hi there! I have Arduino UNO and I would like to create 4 buttons where: If I press the button 1 the Pc press a on the keyboard, if I press button 2 b, button 3 c and button 4 d. To be more specific: I want write on MicrosoftWord Document NOT using a on the keyboard but pressing the button 1 created with Arduino. I need only 4 buttons, not more

Public projects. 7. Sweeps the shaft of a RC servo motor back and forth across 180 degrees We will have a comparison of the specifications of Arduino Uno and the Arduino Nano Board. Arduino Uno. Arduino Nano. Please refer to the table below for the detailed comparison The Arduino Uno is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everythin The loop part is completed. You can see the complete code in the code section of this article. Then upload the code to Arduino Uno. Please make sure the Rx and Tx pin of HC-05 remove from Arduino Uno while uploading. Otherwise you may encounter with some problem to upload the code. Step - 4. Connections. Arduino Uno HC-05. Rx - Tx. Tx - Rx. 5v - +5v. GND - GN Permanent Redirect.

In fact I have an Arduino Uno made by Geekcreit. Like this one? The chip circled in red is the TTL-to-USB converter; it's probably the CH340. And no, that is not a real one but a clone with a different TTL-to-USB chip. What does the properties window in device manager tell you; for the CH340 it should be as shown below. If it's different, let us know GAR Colossus Starter Kit for Arduino Uno Mega Nano Complete Advanced Set, 5 Main Boards - 30 Sensors, 10 Shields w/ ESP32 WiFi + Bluetooth Modules for Wireless Robotics Smart Ca The Arduino in the circuit shown below loads the .wav files from the micro-SD card. It then generates a signal and outputs it through the speaker connected to digital pin 9. This allows the speaker to create sounds and play music. In this tutorial, I have programmed the Arduino audio player to play Rain Over Me by Pitbull and Marc Anthony

What is Arduino UNO? Amazing 11 Features of Arduino UN

REES52 Uno R3 Beginners Kit With arduino Uno Kit, 1 Channel Relay Module, 16 x 2 Lcd Display,Dht11 Sensor Module, Sound Sensor Module, Sg90 Servo Motor, Rfid card for Project Starter Kit With Manual. 3.6 out of 5 stars. 3. ₹1,999. ₹1,999. ₹2,900. ₹2,900 Save ₹901 (31%) Get it by Wednesday, June 9. FREE Delivery by Amazon The Arduino UNO WiFi Rev.2 is the easiest point of entry to basic IoT with the standard form factor of the UNO family. Whether you are looking at building a sensor network connected to your office or home router, or if you want to create a BLE device sending data to a cellphone, the Arduino UNO WiFi Rev.2 is your one-stop-solution for many of the basic IoT application scenarios Let's take a look at some of the members of the Arduino AVR family!More articles and tutorials: https://dronebotworkshop.comJoin the conversation on the fo..

Arduino Uno Board : Features, Pin Configuration, and Its

The Arduino Uno is an open-source microcontroller board based on the Microchip ATmega328P microcontroller and developed by Arduino.cc. The board is equipped with sets of digital and analog input/output (I/O) pins that may be interfaced to various expansion boards (shields) and other circuits. The board has 14 digital I/O pins (six capable of PWM output), 6 analog I/O pins, and is programmable. The Arduino Uno is one kind of microcontroller board based on ATmega328, and Uno is an Italian term which means one. Arduino Uno is named for marking the upcoming release of microcontroller board namely Arduino Uno Board 1.0.This board includes digital I/O pins-14, a power jack, analog i/ps-6, ceramic resonator-A16 MHz, a USB connection, an RST button, and an ICSP header Arduino UNO comes in two variants: one consists of a 28-pin DIP Microcontroller while the other consists of 32 lead Quad Flat Package Microcontroller. Other than that, rest is identical in both the boards. Arduino UNO Board Layout. The following image shows the layout of a typical Arduino UNO board. All the components are placed on the top side.

Arduino Uno - Wikipedi

Arduino UNO - JavaTpoin

ShrinkDuino UNO. Lexcis. 12.1k 949 94. ArduShield it is a development shield for most popular boards like Arduino UNO, Mini, Pro Mini, Nano, Micro, Leonardo and many others boards A Reference and User Guide for the Arduino Uno Hardware and Firmware. A manual providing up-to-date hardware information for the popular Arduino Uno, the easy to use open-source electronics platform used by hobbyists, makers, hackers, experimenters, educators and professionals. Also available as E-book (PDF) >>. Read more. Details. Specifications Arduino™ Uno Rev3 - DIP Version. Arduino™ Uno is a microcontroller board based on the ATmega328P (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header and a reset button Arduino Uno R3. Andrew_Whitham. January 3rd, 2014. An Arduino Uno, Rev 3 in solidworks. Dimensions taken directly from product data sheets and the EAGLE files for the Uno Reference design, so the model ought to be accurate. Otherwise and as always with my models, it's probably useful to suppress the extraneous detail if it's not needed This Arduino Uno is an original microcontroller board from Arduino officials based on the ATmega328P. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header and a reset button

The Full Arduino Uno Pinout Guide [including diagram

  1. Stepper Motor With Arduino UNO: Stepper motors are DC motors that move in discrete steps. They have multiple coils that are organized in groups called phases. By energizing each phase in sequence, the motor will rotate, one step at a time.Stepper motors are very usefu
  2. Arduino Help Center. Hardware All you need to know about our hardware offering: boards, shields and carriers. Software and Downloads Explore everything related to the software released by Arduino and its dedicated libraries. Arduino Cloud Frequently asked questions about Arduino Cloud apps, platforms, subscription plans, and more
  3. Target board (Arduino UNO) Steps. Open the Arduino IDE. Connect the programmer board to your PC. Note: Make sure to select Arduino Uno as the Board and to select its corresponding Port. Upload the ArduinoISP sketch to the Arduino UNO programmer board. Find the sketch in Arduino IDE top menu: File > Examples > 11.Arduino ISP > ArduinoISP

The Arduino Uno pins compatible with PWM are the pins 3, 5, 6, 9, 10 and 11. So you have 6 pins where you can create a PWM, using the analogWrite () function. This can be quite useful to control some actuators that require a fine voltage tuning, and are not only switched on or off I have an Arduino UNO Microcontroller and was searching for resources to get me started. I program in C# (Visual Studio 2010) and was wondering if there were some basics I could use to setting up/testing my connection. I'm looking for something as simple as a check box in my WinForm toggling the Digital I/O pin on the Arduino between high and low The Arduino Uno is the Master and the LoRa transceiver module is the Slave. Wiring HopeRF RFM95 LoRa transceiver module and Arduino Uno (R3). Click on the image for a larger image. Instead of using two breadboards (MB-102 and SYB-170), you can make it more compact by using only the mini breadboard (SYB-170) and 4x 8pin headers. Create an. The small machine — which was designed to resemble a quadruped robot — features an Arduino Uno and a Gbrl control shield at its heart that takes incoming G-code and translates it [] Boards: Uno. Categories: Arduino CNC. An Arduino-powered micro quadruped that fits in the palm of your hand

Arduino UNO projects - Arduino Project Hu

Arduino uno pwm eingang. {YAHOO} {ASK} British shop gießkanne. Englisch too also. Hotel saisha chiplun. Dumme schülerin fickt lehrer. Bestimmung q in p q formel. Arduino uno pwm eingang.. Gefühl wie auf watte laufen. Asia frau kennenlernen. Sie vögelt sich selbst in Strapsen HERZPORNO. Arduino uno pwm eingang.. Arduino uno pwm eingan Arduino Uno. Viraj Patil - 1 year ago. 205 0 0. Arduino uno. Boenzemwend Israel KAFANDO - 3 months ago. 75 0 0. Arduino uno. rajarshidgamer - 2 years ago. 301 0 Arduino Nano to Arduino Uno Adapter: Arduino Nano is a nice, small and cheap member of the Arduino family. It is based on the Atmega328 chip, what makes it as powerful as the biggest his brother Arduino Uno, but it can be obtained for less money. In Ebay now Chinese versions can DFRduino UNO is fully compatible with Arduino UNO R3,suitable for Arduino beginner and hobbyists. DFRobot Leonardo is a low cost controller, integrated with Xbee and SPI. Suitable for low cost and communication demand of hobbyists. DFRduino Mega has 54 digital pins and 16 analog pins, 4 UART channels. Suitable for demands of vast sensors

UNO R3 Arduino Documentation Arduino Documentatio

  1. arduino_uno_a0_read_periodic. Connect NodeMCU and change the COM port appropriately. Open serial console, it should print IP after connecting to Access point. nodemcu_uno_interfacing. If both boards are working as expected, we can connect them together now. Connect Arduino UNO pin 3 to the Rx pin of NodeMCU. Connecting Arduino UNO with NodeMCU.
  2. g language: One of the perks that make Arduino UNO quite popular among the hobbyists and beginners is its easy to use program
  3. ELEGOO UNO R3 Project The Most Complete Ultimate Starter Kit Compatible with Arduino IDE w/TUTORIAL, UNO R3 Controller Board, LCD 1602, Servo, Stepper Motor 4.7 out of 5 stars 789 £50.99 £ 50 . 99 £56.00 £56.0
  4. Haitronic Power Supply Adapter for Arduino UNO ($7.99) Image Credits: Amazon. This power supply module is designed for your Arduino UNO. It comes with an output of 100mA - 2000mA and an input of 100~240V). It has an extended cord of 100cm. The connector size is 5.5×2.1 mm. It has been certified for short circuit protection, automatic.

Simplest UNO Digital Clock Ever - Arduino Project Hu

Understanding the connections of the Arduino Uno voltage regulator subsystem. The rectangular block on the left, titled X1, is the barrel connector. The barrel connector needs a constant DC voltage supply in the range of 6-12V. The barrel connector also needs to have a certain kind of polarity as shown below. The center should be positive, and. We'll take a whirlwind tour on how to run Rust on the Arduino Uno, which is probably the most widely known and used development board in the hobbyist embedded domain. The Arduino Uno is based on the ATmega328P, which is an 8 bit microcontroller falling under the family AVR. AVR is a family of micro-controllers developed since 1996 by Atmel. Now let's design a simulation using this Arduino UNO board so that you get a clear insight on how to use it in proteus. Comparison with Old Proteus Library (V2.0 vs V1.0) The following figure shows the comparison between version 1 Arduino Uno Board (V1) and version 2 Arduino Uno Board (V2) Arduino UNOを自作しました。オープンソースなので誰でも自作できるはずです。利用したプリント基板メーカ JLCPCB http://bit.ly. Uno Download For Mac. The Arduino Student Kit is divided into nine step-by-step lessons and two open-ended group projects. The kit contains boards, a collection of sensors and actuators, access to an online platform, with extra content including invention spotlights, concepts, and interesting facts about electronics, technology, and programming

Arduino Uno R3 Board: a standard Arduino Uno R3 board with 14 digital input/output pins, and a removable, dual-inline-package (DIP) ATmega328 AVR microcontroller. The ATmega328 package consists of twenty-eight ATMega328P IC pins which will hold the connections in place through tight hook-ups. This way no breadboard is needed as the ATmega328. 352 aanbiedingen in juli - Koop en verkoop arduino uno shield eenvoudig op Marktplaats Lokale aanbiedingen - Ga ervoor Bestuur 3 dimmerkanalen (1 x RGB of 3 afzonderlijke kanalen) met Arduino™ UNO.Eigenschappener kan een voorbeeld worden gedownloadstapelbar: er kunnen verschillende shields worden gestapeldgrote [...] Aangemeld blijven Aanmelden Bent u hier voor het eerst? Nu registreren Prototype shield arduino uno met mini breadboard (170 gaats)alle pins van de arduino zijn doorgevoerd. Bovendien heeft het shield ook nog een reset-knop, een universele drukknop en 2 led circuits

official arduino uno 44 Results; Price - OK. Ship From. In stock. Sort by Popular Newest Most Reviews Price. US$9.99 US$22.99 57% Off Geekcreit® UNO R3 ATmega16U2 AVR USB Development Main Board Geekcreit for Arduino - products that work with official Arduino boards 1644 reviews COD Arduino UNO voltage supply reduces when i add more sensors. I have an arduino UNO recently whenever I connect an MQ-9 sensor or an ESP8266MOD wifi chip, the LCD backlight drops that it doesn't display anything, the red LEDs on the arduino board reduces and the voltage regulator begins to get hot, I am using a 12V -- 1.5A DC supply to power the. usb cable for arduino with uno r3 بجودة عالية مع شحن مجاني على AliExpres Created Date: 2/27/2011 10:47:48 P

Arduino - Product

• Afmetingen: 68 x 53mm (*) De Arduino UNO (niet meegelev.) moet gevoed worden door een 12V DC 500mA voeding (niet meegelev.) Het shield is niet compatibel met de Arduino Yún. Gebruik de KA08 of VMA08 met de Arduino Yún Arduino uno R3. van. Geschatte levertijd: 1 - 3 werkdagen in NL. Gratis verzending in NL v.a.€75. 14 dagen bedenktijd. Koper betaalt voor retourzending. Verzendkosten: €5.50 Deze Uno is een degelijke variant board gebasseerd op de CH 340 chip. Hij heeft een USB kabel aansluiting en is te gebruiken met het standaard IDE programma van Arduino, daarvoor moet je wel een van de onderstaande drivers installeren. Geadviseerde externe voeding 9V Windows 32 en 64 bit t/m windows 8.1 Android drive SE Uno R3 . De Uno R3 is de betaalbare en betrouwbare replica van een Arduino Uno. Zo'n board noemen we Arduino compatible. Het enige verschil tussen beiden is de prijs. De microchip (ATmega328P) is exact dezelfde als die van de originele Arduino Uno. Met de bijgeleverde USB-kabel kunt u gemakkelijk sketches uit de Arduino IDE laden op de Uno Arduino Mega Deze Arduino heeft veel meer in- en uitgangen dan de andere Arduino's en je kunt er dan ook grotere projecten mee doen. Programma's die voor de Uno werken zullen (soms met minimale aanpassingen) ook op de Mega werken, maar andersom geldt dat niet

Prototype PCB for Arduino UNO R3. PCB afmetingen: 59.6 mm x 53.3 mm. PCB dikte: 1.6 mm. Materiaal: high quality FR-4 glasvezel. Raster (pitch) 2.54 mm / 0.1, gat diameter 0.9 mm. Relevante producten Arduino UNO CH340 € 8,95 Bekijk. Arduino UNO R3 € 11,75. Tabel formaat Arduino Joystick gecontroleerd T-Slot XY tabel ik nodig om een kleinere versie van de TeleToyland sandbox-2 om naar de Maker Faires en andere shows, dus ik de grootte van de vorige verminderde past niet op een plastic opklapbare tafel. De buiten afmetingen zijn ongeveer 30 x 32 en he. Laad het programma in de Uno en sluit dan op punt 0 (RX Arduino) en 1 (TX Arduino) van de Uno respectievelijk de NMEA-uitgang (pin 11 van de twintigpolige connector) en ingang (pin 12) van de Jupiter aan. Druk op de resetknop van de Uno om het programma opnieuw te starten, en de datum moet nu gecorrigeerd zijn Uitbreidingsboard voor Arduino Uno, Mega, Diecimila, Duemilanove en Freeduino

Arduino ¿Que es, como funciona? y sus partes - Ingeniería

Een PIR-sensor detecteert beweging en wordt in de meeste gevallen gebruikt om te controleren of iemand zich binnen of buiten het bereik van de sensor verplaatst.Specificatiesvoltage: 5 VDCaansluiting: 3 pin: GND, VCC and OUTadjustments: sensitivity and delay (by trimmer)vertragingstijd: 0.3 to 18 suitgangsniveau: high = 3 V, Low = 0 Vmax. sensor distance: 7 moperating temperature: -15 to +70. De 4 M3-schroefgaten komen overeen met de montagegaten van de Arduino UNO. Geleverd met 4 schroeven (M3 x 8). Specificaties. afmetingen: 160 x 106 mm; max. afmetingen breadboard: 88 x 60 mm; gewicht: 50

Arduino Uno Vs Nano Vs Mega, Pinout, and technical

Hallo Allemaal, nieuwe Arduino gebruiker hier. Na lang denken en veel filmpjes over Arduino en de vele mogelijkheden, ben ik toch in het diepe gesprongen en wil ik graag een arduino Project doen voor mijn Twitch stream. Namelijk een vanuit de Twitch chat gestuurde pixelmatrix. Hiervoor voor heb ik: 1x Arduino uno board 1x WS2812B 16x16 matrix 5V 10A 50W voeding Twitch extensie (getintouch) om. Dankzij de projecthouder kunt u de Arduino® UNO en het breadboard verbinden. Deze is voorzien van twee uitsparingen (afm. uitsparing 88 x 600 mm): een uitsparing voor een breakboard met 400 insteekpunten en een andere uitsparing voor de Arduino UNO. De 4 M3-schroefgaten komen overeen met de montagegaten van de Arduino UNO

Uno R3 ATMega328P / 16U2 - Arduino Compatible (incl. USB-Kabel) Alle informatie over arduino in het algemeen en onze Boards vindt u op: https://arduino-compatible.zeef.com Algemeen Dit board is 100% compatible met het meestgebruikte Arduino Board: de Uno. Maak de mooiste projecten me en driver die is aansturen vanaf elke Arduino® of andere compatibele printplaat met draadbruggen. De 4-fasige led geef de status van de stappenmotor weer. Werkspanning: 5 VDC Stappen: 64 Diameter: 28 mm Reductieverhouding: 1:64 Afmetingen: 35 x 32 x 10 m Arduino vma203LCD-SHIELD EN TOETSENBORD VOOR ARDUINO® - LCD1602 . Artikelnr.: 32469. 16x2 shield met LCD-display en keypad voor Arduino Uno, Mega, Diecimila, Duemilanove en Freeduino. Kenmerken blauwe achtergrond / witte karakters contrastinstelling werkt met de 4-bit Arduino LCD-bibliotheek resetknop de navig Met deze transparante protoplate kan je makkelijk je project vastzetten. De protoplate is geschikt voor: Arduino Uno 400 tie points breadboard Kenmerken Transparant acryl Inclusief 4 spacers & schroeven 4 Antislip rubbertjes Afmetingen: 145 x 105m Handige GWS set voor uw diy projecten. 375 led lampen in de afmetingen 3mm-5mm in 5 verschillende kleuren. Zij bijgevoegde lijst met meer specificaties. De set wordt geleverd in een handige plastic case. UNO REV.3 (ARDUINO-UNO-R3) (arduino compatible) (19) 8,75

Goedkoopste Doe-Het-Zelf bouwmarkt van Valkenswaard en omstreken. Retourneren & Garantie; Contact; Selecteer categori Arduino Uno not included. Milieu-informatie. RoHS Voldoet aan. RoHS-conformiteitscertificaat. REACH Regulatie SHVC Genoemd REACH Regulatie verklaring Fabrikant Arduino. Bruto gewicht (incl. Verpakking) 230.0 Gram. Afmetingen (incl. Verpakking) 110 x 185 x 45 MM. Douanenummer 8542311100. UNSPSC (v5.03) 32101703. EAN 7630049202979. 16x2 shield met LCD-display en keypad voor Arduino Uno, Mega, Diecimila, Duemilanove en Freeduino. Blauwe achtergrond / witte karakters. Contrastinstelling en resetknopWerkt met de 4-bit Arduino LCD-bibliotheek De navigatieknoppen (omhoog/omlaag, links/rechts) gebruiken slechts één analoge ingang Afmetingen: 80 x 58 x 20 m Projecthouder Arduino® Uno + Breadboard 9,95529VMA508Dankzij de projecthouder kunt u de Arduino® UNO en het breadboard verbinden. Deze is voorzien van twee uitsparingen (afm. uitsparing 88 x 600 mm): een uitsparing voor een breakboard met 400 insteekpunten en een andere uitsparing voor de Arduino UNO. De 4 M3-schroefgaten komen overeen met de montagegaten van de

Nice drawings of the Arduino UNO and Mega 2560 | Wayne andArduino BT Definición y caracteristicasToy0046 pinoutLa aplicación de Arduino brazo robot - askixArduino | BehuizingenArduino Compatible KitsArduino ontwikkelbordenBeetle

The DFPlayer Mini MP3 Player For Arduino is a small and low price MP3 module with an simplified output directly to the speaker. The module can be used as a stand alone module with attached battery, speaker and push buttons or used in combination with an Arduino UNO or any other with RX/TX capabilities Uno rev 3. De Arduino Uno is een microcontroller-board gebaseerd op de ATmega328. Volledige ondersteuning voor de microcontroller is aanwezig op het board: sluit het aan op een computer via USB of op een lichtnetadapter en u kunt aan de slag. Nieuw aan de Uno ten opzichte van zijn voorgangers is dat de USB/serieel-driver van FTDI heeft. Arduino compatible - uitbreidings board voor arduino uno r