improve brightness light led on klee _ help!

Polina · Joined: Jul 26, 2021 Posts: 1 Location: Italy

Hi, can someone tell me how to improve the brightness of the LEDs combined with the pattern programming switches and for the bus LEDs?
Syo using the yellow ones but they seem not very bright compared to those used for the random reference and for the variable range (red and green). Which resistor should I replace and which value to use? Thank you Rolling Eyes

Steveg · Joined: Apr 23, 2015 Posts: 169 Location: Perth, Australia

Hi Polina, Welcome to electro-music.

It may not be as simple as just reducing the resistor value. Those values will have been selected to not overheat the CD4034 chips that are driving them (If I am looking at the right part of the schematic). What you need to do is get a higher efficiency LED. Look for a LED with the correct size and colour and a brightness of 1000mcd or more. I would suggest getting one and substituting it as a test. A higher brightness usually means a narrower angle of view and depending on the colour that might be overly distracting or not properly visible.
Ultra bright LEDs usually have clear packages ... if you have a cloudy coloured package you definitely have a low brightness LED.
If you have a local electronics supply store you can usually find knowledgable staff to help you.