| ??? 08/23/05 12:28 Read: times |
#99893 - simple, drop the multiplexing Responding to: ???'s previous message |
Also, do you have any idea about how a greatest brightness display circuit can be made?
simple, drop the multiplexing For my circuit, I will need to display a whole board mono-color, i.e. the whole board colored from red change to blue to purple, to orange, etc. And it need to be display at out-door. You will STILL have to forget about all 3 LEDs full on at the same time, white is nor red, green and blue, it is 1/3 red, 1/3 green, 1/3 blue. Without MPX you can get enough intensity for outdoor, I have signs seen clearly in the CA sun. Erik |
| Topic | Author | Date |
| Questionn - Not even brightness for LEDs | 01/01/70 00:00 | |
| Sounds like you've answered the question | 01/01/70 00:00 | |
| What minizium change I need | 01/01/70 00:00 | |
| Test some things | 01/01/70 00:00 | |
| Test | 01/01/70 00:00 | |
| Try PNP instead of NPN | 01/01/70 00:00 | |
| Both method | 01/01/70 00:00 | |
| Increase the voltage accross the load | 01/01/70 00:00 | |
| even brightness... | 01/01/70 00:00 | |
| Spec for LED | 01/01/70 00:00 | |
| something is wrong... | 01/01/70 00:00 | |
| RGB LED's Luminous | 01/01/70 00:00 | |
| even considering voltage will get you in | 01/01/70 00:00 | |
| Explain more | 01/01/70 00:00 | |
| simple, drop the multiplexing | 01/01/70 00:00 | |
| Will this work | 01/01/70 00:00 | |
| Erik says | 01/01/70 00:00 | |
| this will | 01/01/70 00:00 | |
| Can I use UDN2891a | 01/01/70 00:00 | |
| can't say | 01/01/70 00:00 | |
| probably means 2981 | 01/01/70 00:00 | |
if so, you just don't get it do you | 01/01/70 00:00 | |
| why would you do that ? | 01/01/70 00:00 |