Shield arduino mega pinout pdf#
Shield arduino mega pinout pro#

The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). This pin outputs a regulated 5V from the regulator on the board. You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.ĥV. The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). Top left in the diagram you will see the barrel jack connects through a reverse protection diode to a 5V regulator. If you want to power it from 12 V or a car system, you need a 5 V switchmode 'buck' regulator to supply the 5 V.

Shield arduino mega pinout pro#

The '5V' pin is not by any means an output pin, if anything a 'reference' pin but most certainly the preferred pin to which to supply a regulated 5 V.Ī practical power supply for the Nano (or UNO, Pro Mini, Leonardo etc.) is a 'phone charger' with a USB output connector for 5 V, generally up to a couple of Amps though you can not feed more than 500 mA through the USB connection. Powering via the 'barrel jack' or 'Vin' connections is asking for trouble.

The on-board regulator might be able to power a few other things if it had a heatsink, but on the (older) Arduinos, it does not. This is because the on-board regulator is essentially capable of powering only the microcontroller itself and no more than a couple of indicator LEDs. In which case, the answer is regulated 5 V. If you are asking this question, it is highly likely that you will wish to connect something else. And even then it was limited because an unloaded 9 V transformer-rectifier-capacitor supply would generally provide over 12 V which the regulator could barely handle. It is essentially only for demonstration use of the bare board back in the very beginning of the Arduino project when '9V' transformer-rectifier-capacitor power packs were common and this was a practical way to power a lone Arduino board for initial demonstration purposes. It seems to be a sort of religious belief or something like that!Ī very real danger is that the obsolete tutorials on the Arduino site and others misleadingly imply that the largely ornamental 'barrel jack' and 'Vin' connections to the on-board regulator allow a usable source of 5 V power. That is a piece of nonsense written by the Arduino authors 'way back when' and never updated. The shield is compatible with all the Arduino boards, 5V and also 3.3V standards.Paul_B: Now I'm a little bit confused. Note that the distance between digital pins 7 and 8 is 160 mil (0.16'), not an even multiple of the 100 mil spacing of the other pins. Four screw holes allow the Shield to be attached to a surface or case. The maximum length and width of the 4 Relays Shield PCB are 2.7 and 2.1 inches respectively. Both connect to the same TWI interface to allow you to create a chain of TWI devices. 2 TinkerKit TWI: these connectors (4-pin in white) are routed on the Arduino TWI interface.2 TinkerKit Outputs: OUT5 and OUT6 (in orange), these connectors are routed to the Arduino PWM outputs on pins 5 and 6.

2 TinkerKit Inputs: IN2 and IN3 (in white), these connectors are routed to the Arduino A2 and A3 analog input pins.

Connecting TinkerKit modules can simplify the creation of a project or a prototype. The relays are controlled by the following Arduino board pins: Relay 1 = Arduino pin 4 Relay 2 = Arduino pin 7 Relay 3 = Arduino pin 8 Relay 4 = Arduino pin 12 The shield features several TinkerKit input/output and communication interfaces. The shield doesn't need external power: it will be provided by the base board, through the 5V and 3.3V pins of the Arduino board used as base. Single pole chargeover contact maximum 30 V DC 2A

Shield arduino mega pinout pdf#

PDF Descriptionġ40 mA (with all releays on, about 35 mA each) The Arduino 4 Relays Shield is open-source hardware! You can build your own board using the following files:ĮAGLE FILES IN.