| ??? 07/05/05 12:17 Read: times |
#96601 - Capacitor? Responding to: ???'s previous message |
What about inserting some high-capacity capacitor in paralell? This way you'd smooth out (antialias) the PWM output, peak current goes into capacitor, LED voltage¤t remaining on safe level, then during PWM "low", the capacitor sources power keeping the LEDs lit - with one big enough, constant load and some current limiting resistor, you can practically turn PWM into a slow and nonlinear but very smooth and hi-res DAC. |
| Topic | Author | Date |
| PWM - LCD backlight | 01/01/70 00:00 | |
| One Approach! | 01/01/70 00:00 | |
| Why not. | 01/01/70 00:00 | |
| Not an entirely good idea | 01/01/70 00:00 | |
| But | 01/01/70 00:00 | |
| But but | 01/01/70 00:00 | |
| hmm | 01/01/70 00:00 | |
| Apologies | 01/01/70 00:00 | |
| Buck, actually | 01/01/70 00:00 | |
| Bugger it. | 01/01/70 00:00 | |
| Bugger it | 01/01/70 00:00 | |
| Capacitor? | 01/01/70 00:00 | |
| biology | 01/01/70 00:00 | |
| Per | 01/01/70 00:00 | |
| development | 01/01/70 00:00 | |
| I got that working nicely.... | 01/01/70 00:00 | |
| Well Done | 01/01/70 00:00 | |
| what I do | 01/01/70 00:00 | |
final cut | 01/01/70 00:00 |