Looking to wire an LED light indicator for my garage door. I'm in no way a lighting/electrical expert and I could use help. I do repair copiers for a living. Home auto mechanic rebuild motors etc. I have replace the entire house with new receptacles. I am a tech and work on electrical things here and there.
Here is what I need help on. I am wiring a sensor so that when the garage door opens a Led light will come on in the house to let me know that its open.
This is what I have:
- Transformer/ power supply input 100-24v,output 9v-500mA
- 3mm Pre-wired LED Red Emitting Diode DC 9-12V 620-630nm Voltage(V) 20ma
- Door Contact Magnetic Reed Switch closed. Max. Current: 0.5A Max. Voltage: 100V DC Max. Power: 10W
- 40 feet of wire
Do I need any resistor for this? or will it work fine with out it?