Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I been doing some more thinking. What if I used a 317 circut to regulate the voltage, I feel like that would work, but i would be force to keep the voltage above 1.2v. I am only familiar with using a 555 to create a square wave, what are some other popular methods.
Thanks,
Mike
I'd stick to the 555 timer. How does it get less than 50%? If you read the datasheet, the formula is:I understand PWM but with a 555 how do you get below a 50% duty cycle.
If I'm not mistaken ElectroMaster put up a 555 calculator too in this forum. Hmm. You might wanna breadboarding all the components now.
You don't need PWM or any complex circuit. Just a simple transistor with a pot on the base to control the base current. Put the LEDs in the collector circuit and they will change in brightness.
You obviously don't know what you are talking about.It's quite tricky to control the base current though. Current's in microamps usually.
'Quite tricky' may be over stating it. If you don't care about variation between one transistor to the next, and you don't care about linearity or temperature sensitivity is acceptable, it can be made to work.It's quite tricky to control the base current though. Current's in microamps usually.![]()