Hey there everyone!
Been reading AAC website for a while, but recently decided to sign up and join the community .
Currently I'm trying to combine the non-inverting amplifier experiment:
http://www.allaboutcircuits.com/textbook/experiments/chpt-6/noninverting-amplifier/
with one of your users blog posts (Wendy):
http://forum.allaboutcircuits.com/blog/leds-555s-pwm-flashers-and-light-chasers-index.378/
in order to make an LED bargraph connected to a mic (electet). The volume of the voice input to the mic will determine the quantity of LEDs ON - the louder the sound, the more LEDs turned ON. (I guess it's possible to do it easier with just transistors, but i want to use an op-amp, for fun ).
So i was tinkerring a bit and it worked, BUT as i plan to work with a 9V battery max, i can't go beyond 4 leds (voltage drop becomes bigger than Vsupply, as LEDS are in series, as I understand)...
Do you guys think it's possible to redesign the bargraph so a 9V battery could turn ON, say, 10 LEDs and not in the same time?
Thanks a lot in advance and hope I stated my problem clearly!
Been reading AAC website for a while, but recently decided to sign up and join the community .
Currently I'm trying to combine the non-inverting amplifier experiment:
http://www.allaboutcircuits.com/textbook/experiments/chpt-6/noninverting-amplifier/
with one of your users blog posts (Wendy):
http://forum.allaboutcircuits.com/blog/leds-555s-pwm-flashers-and-light-chasers-index.378/
in order to make an LED bargraph connected to a mic (electet). The volume of the voice input to the mic will determine the quantity of LEDs ON - the louder the sound, the more LEDs turned ON. (I guess it's possible to do it easier with just transistors, but i want to use an op-amp, for fun ).
So i was tinkerring a bit and it worked, BUT as i plan to work with a 9V battery max, i can't go beyond 4 leds (voltage drop becomes bigger than Vsupply, as LEDS are in series, as I understand)...
Do you guys think it's possible to redesign the bargraph so a 9V battery could turn ON, say, 10 LEDs and not in the same time?
Thanks a lot in advance and hope I stated my problem clearly!