I am working on a RGB LED Strip controller to light the inside of my PC. I plan to use a Molex connection 12V DC to power the circuit, the LEDs I am using can run up to 12V, but it should run at about 9V. So I need to drop 12V – 9V for that.
In controlling the LEDs I have designed a system using 3 potentiometers and a HEX inverting Schmitt Trigger to control the LEDs values. The IC runs off of 2V – 5V and need to control power.
I designed the system by combining this design, and this design, to power the LED strip and drop the power using a design I cannot find again.
(Note the LED in schematic is different from the ones actually plan to use, Ground in this case is meant to be +12V)
Before I go buy parts and start trying this, I want to get some better eyes on the project. I have yet to do anything other than messing around with an Arduino Uno and a breadboard to learn this stuff basically (I just figured how to use transistors as logic gates).
Best Answer
In your circuit diagram is the first voltage regulator a 5V version and the second a 3.3V.
If you use a 7809 (9V) for the first and a 7805 (5V) for the second voltage regulator it should work fine. But have in mind the power consumption of the LED strip that the 7809 can handle it.
I don't know the PWM circuit with the 74AC14. If he post it it should work. But in your circuit you use 1N4001 diodes which is not necessary. They can handle higher current compare with the 1N914. Use the 1N914 or 1N4148 it is equivalent. Datasheet