I am designing a tachometer with 30 LEDs. I am using a 7805 voltage regulator with my circuit. The freq/voltage converter worked fine but when I connected the signal out to three LM3914 LED drivers to drive a total of 30 LEDs my voltage out of my 7805 dropped down to 3.4 volts. If my supply voltage to my regulator is 12v why is the regulator not regulating my voltage to 5 votls? Is 30 LEDs drawing too much voltage for this?
I appreciate any help that you can provide.
Thanks
I appreciate any help that you can provide.
Thanks