Bromosapien
New Member
Hey guys,, i am new to the forum & fairly new to the whole electronics realm//
Heres my story.. I am a musician & play bass guitar.. I have two instruments that use an active tone preamp . One uses one 9v batt and the other uses 2 9v. I have seen other guitars with a LED light to indicate battery life.. so id like to install them on mine. plus i think they look cool
Soo.. I went to radio shack and bought 2 2.1v, 20ms green LEDs. unfortunately nobody there knew anything about LEDs or resistors.. :/ of course
my question is what kind of resistor would i need??
i used an OHM law page and came up with a 390ohm 1/4watt resistor for 1 9v battery, and a 819.99 1 watt resistor for 18v. is this right???
My other question is are the LED lights going to effect the output or drain the battery faster???
I am good with alot of electronic installs, as long as all the right parts are there. I know to wire LED & resistor in series at least
Thank you so much for any feedback..
Heres my story.. I am a musician & play bass guitar.. I have two instruments that use an active tone preamp . One uses one 9v batt and the other uses 2 9v. I have seen other guitars with a LED light to indicate battery life.. so id like to install them on mine. plus i think they look cool
Soo.. I went to radio shack and bought 2 2.1v, 20ms green LEDs. unfortunately nobody there knew anything about LEDs or resistors.. :/ of course
my question is what kind of resistor would i need??
i used an OHM law page and came up with a 390ohm 1/4watt resistor for 1 9v battery, and a 819.99 1 watt resistor for 18v. is this right???
My other question is are the LED lights going to effect the output or drain the battery faster???
I am good with alot of electronic installs, as long as all the right parts are there. I know to wire LED & resistor in series at least
Thank you so much for any feedback..