| ??? 12/19/05 20:55 Modified: 12/19/05 21:08 Read: times |
#105553 - Thanks for warning, Kai Responding to: ???'s previous message |
Kai Klaas said:
Take care, the built-in 120R resistors can abnormally heat-up and can make the die die! Well, as said, I don't mind for a toy to fail. However, the smoke&flame test has been already done - I was running this "chain" already - but that time controlled from a PC (an old 486 laptop) - 3 years ago for several days continuously, and it survived... A quick calculation - a LED drops cca 2V, so the power loss is cca 3V*3V/120Ω=75mW. The SW was/is made so that max. half of the LEDs is on simultaneously... 300mW per chip, I think it is viable. They are far from being hot indeed. Kai Klaas said:
By the way, can you make a wmv-file of the blinking? I tried to make a shot but I am really bad in this modern stuff - it is in mov, that's what my camera spits out. However, the picture is really disappointing and far from the real stuff and the file is rather big (1.7MB) - not really worth downloading. Jan Waclawek PS. Steve, I don't know how do you manage this, but for my hobby stuff which I am attempting to do at home - I am unable to do anything more complicated, as I need to delete at least twice as much as I type - my kids are hanging on the keyboard all the time I switch on the computer. So sorry, no music this time - maybe 16 years later :-) |
| Topic | Author | Date |
| open project: christmas lightchain | 01/01/70 00:00 | |
| Take care... | 01/01/70 00:00 | |
| with music too | 01/01/70 00:00 | |
| Thanks for warning, Kai | 01/01/70 00:00 | |
| Looks nice! | 01/01/70 00:00 | |
| OK, count me in. Here's Schematic | 01/01/70 00:00 | |
| software | 01/01/70 00:00 | |
| Knight Rider LED pattern Software | 01/01/70 00:00 | |
| Knight Rider | 01/01/70 00:00 | |
| Another option | 01/01/70 00:00 | |
| Knight Rider Software Corrected | 01/01/70 00:00 | |
| Too much time | 01/01/70 00:00 | |
| some more led sequencers | 01/01/70 00:00 | |
| variations | 01/01/70 00:00 | |
| tastes great; less filling | 01/01/70 00:00 | |
| I was wondering which one it would be. | 01/01/70 00:00 | |
| beer | 01/01/70 00:00 | |
| beer | 01/01/70 00:00 | |
| Sam's Light | 01/01/70 00:00 | |
| better | 01/01/70 00:00 | |
| who can ever agree on taste | 01/01/70 00:00 | |
| best beer | 01/01/70 00:00 | |
| The Henley Rowing Club | 01/01/70 00:00 | |
| "Authentic" | 01/01/70 00:00 | |
| Beer tastes | 01/01/70 00:00 | |
| Sure | 01/01/70 00:00 | |
| Leffe' | 01/01/70 00:00 | |
update | 01/01/70 00:00 |