I'm using arduino. I read that I need extra power source to control more than a couple. Where can I find docs on this and can I use a 9 volt battery?
609853
You could use a 9v battery however you'll need to run it through a regulator. The device runs on 5v. You can get a nice 5v power supply here on amazon for around $15 and that you can power with AC.
609854
You can control the whole relay board with the Arduino - no extra power supply.
609855
9V transistor batteries are rated for very low current (over 200 service hours -- at 2 mA for one) and would not be recommended. Arduino Uno wants to have 7V or more on the power input jack. As an example, the Duracell PC1604 9V battery is rated to stay above 7V for only seven hours at a current draw of 50 mA, and about 3 hours at 100 mA.
924531
That depends. The 12VDC power supply that you use must have the current capacity for operate all the relays (Assuming there is the potential for all 16 to be active at once) I don't have a relay board available to test, but would guess the coil current to be about 50 mA. x 16 that means I'd expect the board to require at least 1 Amp with overhead. The Arduino plus any other users on the bus have to be added so I'd use at least a 2 amp supply to run the system.
1304355
You can send power to the motors a number of ways. They are just DC motors, so a 9V battery will spin the motors, but it will be sending higher voltage than the 1v to 6v that the motor expects. That can be detrimental to the motors. This kit is best sent power and commands by a motor shield on an Arduino, or a Motor Hat with a Raspberry Pi, as a part of a larger RC or robotic project.
657043
I *think* they are for external power as you suggested. It would be useful when many relays were operated and their current exceeded the Arduino's power supply regulator circuit capability. I am running two 8-relay boards off the Arduino 5v but am careful to only operate 3-4 at a time. The Arduino forum may have additional insights. If using external power be careful not to exceed arduino's output pin voltage and current sink capabilities.
398721
An arduino can control it up to 5 volts, but you can get better performance with a controller.
546880
There should be a negative and positive terminal where you can put a wire in and clamp it as seen in the picture near the bottom corner the two terminals. You'll need to take a 9V battery and get one of those connectors where it connects to both of the battery's leads and turns them into a red and black wire.Put those wires into the terminals respectively and it should be powered
688566
The 9V battery "hack" to get 6 AAAA batteries is completely true- I just pried apart a Duracell 9V and ended up with 6 batteries to use in anything that supports AAA or AAAA. It's wonderful (once you get through that ton of plastic and metal surrounding them!). I also found that those mini AAAAs' + and - were opposite from what seemed logical, so flip them around until they work.
165915
You need a charge controller, otherwise you will fry your batteries...This also a 24 volt panel, so you will need solar charge controller tha can handle up to 45 volts.
647739
the C wite is essentially just a power source. If everything else works with just a battery and you don't have just the C wire, then this is what you need.
1045139
I know you need 1 9volt and the rest are AA Batteries but I'm not sure how many of the AA you need!
685903
This requires an external 12v power supply which isn't included. A decent supply can be found on Amazon by searching for B007TGO3HO. It's about $7.79 and should have plenty of capacity for your project. Happy automating :-)
1304354
Not directly. The motors are 3 volt motors and if you provide higher voltages, the motors will be damaged over time. The kit comes with a battery holder for 2 AA batteries. If you absolutely need 9 Volts, you can either look for 9 volt replacement motors or use an inexpensive voltage converter. These guys http://www.pololu.com/ have a great selection and they may even have replacement motors.
1027993
Correct. Either you use à 9v battery or get a separate power adapter. I bought a Haley Benton power station to feed all my pedalboard.
1784691
You don't need a controller because this unit does not supply enough amps to overcharge a regular sized (car, boat, etc.) battery. If you test the voltage under no load it may scare you because it's too high, but if you apply ohm's law and understand that the current is limited by the capacity of the unit, you'll find that the voltage under load is only a couple of tenths of a volt higher than the battery in its disconnected state.
546881
There should be a negative and positive terminal where you can put a wire in and clamp it as seen in the picture near the bottom corner the two terminals. You'll need to take a 9V battery and get one of those connectors where it connects to both of the battery's leads and turns them into a red and black wire. Put those wires into the terminals respectively and it should be powered
1620656
I haven't tried with 9 volts but if you intend to use a 9 volt battery better connect a resistor in series, there are guides on google to calculate the the value of the resistor to be used!
1169005
You will need a 9 volt battery ( included with mine) you should test the battery, it should have 9.35 volts to be charged. Or you can purchase a 12 volt adapter . If you have more than one pedal that required a 9 volt supply you can purchase a "ONE SPOT", it will power multiple pedals.