Citizen86
100+ Head-Fier
- Joined
- Mar 31, 2008
- Posts
- 257
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- 10
Hi guys and gals,
I tried a super simple DIY project, basically 3 LED's powered by a 9V battery... I followed this diagram:
So I connected the battery positive to the resistor, resistor to + LED 1, - LED 1 to + LED2, - LED2 to + LED3, - LED3 to - battery. Simple, right?
Lights are not turning on. I used my multimeter to try and see what's up, and the strange thing is that using the DCV 20 setting on my MM, it shows ~9 volts in the 1st LED, but negative 9 volts through the 2nd, and positive 9 volts through the 3rd. Does this mean that the 2nd LED is reversed? The spec sheet and even looking at the LED, the small part of the metal inside the LED is positive, that's how it is connected...
Does anybody have any idea why my LED's refuse to turn on? Thanks.
I tried a super simple DIY project, basically 3 LED's powered by a 9V battery... I followed this diagram:
So I connected the battery positive to the resistor, resistor to + LED 1, - LED 1 to + LED2, - LED2 to + LED3, - LED3 to - battery. Simple, right?
Lights are not turning on. I used my multimeter to try and see what's up, and the strange thing is that using the DCV 20 setting on my MM, it shows ~9 volts in the 1st LED, but negative 9 volts through the 2nd, and positive 9 volts through the 3rd. Does this mean that the 2nd LED is reversed? The spec sheet and even looking at the LED, the small part of the metal inside the LED is positive, that's how it is connected...
Does anybody have any idea why my LED's refuse to turn on? Thanks.