I am hoping somebody will be able to offer me some help with a 555 circuit design. I previously worked with the 555 during college, but it was the mass produced variant with a standard data sheet.
The project that I am working on at the moment requires 2 LED panels (3v @ 20ma each) to be driven from a single CR123 lithium battery, with the ability to dim the brightness.
The reason I was considering a 7555 is:
1. It can provide a dimming via PWM with the inclusion of a potentiometer/variable resistor
2. It could pulse a full output with a duty cycle that would increase battery life
This is operating on the threshold of most 555 chips, except those mentioned in this thread: http://forum.allaboutcircuits.com/threads/555-3v-led-flasher-circuit-help.47486/
I did not want to hijack the thread, but it is similar to my requirement.
These are the LED backlights I am hoping to run (x2) from the CR123: https://www.coolcomponents.co.uk/white-led-backlight-module-large-45mm-x-86mm.html
Any help appreciated...
(If there is an existing module - like those used in torches as drivers - then links would be welcome)
The project that I am working on at the moment requires 2 LED panels (3v @ 20ma each) to be driven from a single CR123 lithium battery, with the ability to dim the brightness.
The reason I was considering a 7555 is:
1. It can provide a dimming via PWM with the inclusion of a potentiometer/variable resistor
2. It could pulse a full output with a duty cycle that would increase battery life
This is operating on the threshold of most 555 chips, except those mentioned in this thread: http://forum.allaboutcircuits.com/threads/555-3v-led-flasher-circuit-help.47486/
I did not want to hijack the thread, but it is similar to my requirement.
These are the LED backlights I am hoping to run (x2) from the CR123: https://www.coolcomponents.co.uk/white-led-backlight-module-large-45mm-x-86mm.html
Any help appreciated...
(If there is an existing module - like those used in torches as drivers - then links would be welcome)