Need to connect to 12V 9.6Ah alarm system battery. Does anyone know max current it can take? Do I need to put 600 Ohm resister in front of red wire?
911091
As they said - and for new users - voltmeters are in parallel (red to red, black to black) so DO NOT draw current other than their own tiny working about 10~20mA for themselves.Adding a resistor ahead is only done if feeding it more than its operating voltage and for only experts - this unit does3~30V so 12V is perfect within range.(AMPMETERS on the other hand are in series so they must be rated within or for the desired load you use - like water flow IN a hosepipe) (and have special resistors supplied if needed)
911092
As they said - and for new users - voltmeters are in parallel (red to red, black to black) so DO NOT draw current other than their own tiny working about 10~20mA for themselves. Adding a resistor ahead is only done if feeding it more than its operating voltage and for only experts - this unit does3~30V so 12V is perfect within range. (AMPMETERS on the other hand are in series so they must be rated within or for the desired load you use - like water flow IN a hosepipe) (and have special resistors supplied if needed)
911093
It will take whatever it need to operate, probably about 0.01 amperes, you need to put the 600 ohm resistor someplace to remind yourself to learn the basics of Ohm's law. You don't even need to know what B,B,R,O,Y,G,B,V,G,W is.
911094
Being a Volt gauge you would not be wiring in series through the gauge like is done with an amp-meter. The Volt gauge would be wired to a positive and negative lead to measure voltage only. No power would be transferred to any load so the amp draw from the load would not effect the gauge wires or gauge.
911095
Are you asking how much current this meter requires to work? If so I wouldnt imagine very much at all though I dont have a definite number. Putting a resistor in series with the meter would affect the voltage reading. What exactly are you trying to do?
911096
Don't know max current, but I have mine connected inline (red to positive, black to negative) to two 100 amp parallel 12 volt deep cycle RV batteries which run attic ventilation fans and spot lights through a solar charge controller. Running steady for two months, 24/7.
940706
I'm planning to use a 9v battery to light up 2 or 3 of these LEDs; I see F. Solano has used a 200ohm resistor to accomplish similar, but Kapowzer claims a 1k resistor? Any advise re: which to use would be appreciated - thank you.
63450
You will need to wire it directly to your battery. If I recall correctly the instructions say "no more than 10 feet" from the battery. I used 14 gauge wire with an inline 30 amp fuse and put a 50 amp 12 volt switch inline between the fuse and the unit. It comes with short hot and negative wires. You will definitely have to buy more wire. It worked great and far exceeded my expectations. I would still be using it, but I was so pleased I upgraded to an RM 500 unit which I am still using.
1567082
The 12V charger on this unit is minimal, maybe 10 watts, it should say in the specs, but I don't remember. I know I used the 12V plug on my motor home start battery and it barely made a difference on a 600 watt battery. You could use a separate 12V charger as long as it doesn't demand too many watts. Good luck.
94499
I have connected it straight to a 9v battery and it works fine. It's not as bright as hard wired to a 12v system, but it does work.
923496
Open up the compartment were the actual alarm speaker is and unplug it. Then plug the siren on this wires and try it. If the noise is too low. Buy the bigger battery. The big square one they sell for the lanterns. That should work. Or use two 9v batteries, but try one at a time. Just run wires to the batterie compartment inside since the 9v battery or the big square one won't fit for obvious reasons. the last resort a car battery will work as well since they are 12 volts.
2175070
You should be able to wire together all positive an all negative and just connect one + and one - to the battery. The current draw is fairly low so it should be no problem.
1415488
I soldered and shrink tubed the power connection. I used this for a simple open door alarm trigger for an underground radio vault. It works great. My application was a one time use. See Digikey or Mouser for connectors.
2081435
the lock uses very little power, I would assume a 12v battery would work fine, I think creating a circuit similar to an emergency light would work without issues
516363
The sensor is designed for alarm systems, but is 100 VAC/VDC @ 0.5 amp. If the LED strip fits those limits, it should work okay. It uses a magnetic reed relay, so should be resistant to contact corrosion. However, it is normally closed when the magnet is near, so the off/on is clearly "backward". You could either add in a relay or do something too clever like putting the magnet at the back of the drawer so that it only lights in the fully drawer open position. Neither is optimal.Dan
923493
You could use an SW-433 and plug in a 12VDC at about 1.5 Amps power supply that would run a regular security siren.And you could run the 12 VDC 2 conductor wire out side to the siren. ( and keep the 120VAC inside the house).I actually have a 12 VDC power supply turned on when triggered by a alarm signal. The alarm signal goes to a relay board that turns on the 120 VAC to the 12VDC power supply and the 2 sirens are powered by it. Takes a load off the alarm board.
1115548
No. The battery is only a 6 volt battery your adt alarm needs 12 volts. You either need to find a different battery or use 2 of these UB645's connected in series so that they produce 12 volts.
2228489
I would use 6 gauge stranded copper wire as you don't want any more than 3% voltage drop. If operating at the high end of the 600 watt, 4 gauge would even be better. You're actually better off positioning the inverter closer to the battery source and running an extension cord from the inverter to the usage area.
940704
I recommend a 9v battery with a 1k resistor. You could fine-tune the voltage and resistance, but those are easy and quick numbers that I've tested on a string of 10 LEDs.
1880652
You will need to put 5 volts across the pin labeled 5V, and any of the grounds (GND). You can use a battery, however the power supply must be regulated at 5 volts, so you cannot directly connect a 9 volt cell. You could use something like a 7805 regulator to generate this supply if you intend to use a 9 volt cell.
2258986
I use these with 3 volts (2 AAA batteries) and a 150 ohm resistor. To use 9 volts you need to use a ~450 ohm resistor , but, yes, they will work fine with a 9v battery.
2110131
I would imagine it will work. It takes 12 volts DC on two wires and two other wires for alarm contact. Pretty standard alarm configuration.