| ??? 08/25/05 16:58 Read: times |
#100097 - LED Driver - My Solution Responding to: ???'s previous message |
Thanks for the ideas you told me.
Because I wanted to do it with parts "in stock" I refreshed my basic electronic knowledge and did it with 4 standard transistors. I connected the portpins with a 100kR resistor to the Base, the emitter direct to the ground and the collector with a 150R resistor which is connected with the LED. And all LEDs have a common Vcc. It works well. Alex |
| Topic | Author | Date |
| I need help with LED Driver | 01/01/70 00:00 | |
| LED | 01/01/70 00:00 | |
| LED | 01/01/70 00:00 | |
| use a LED driver | 01/01/70 00:00 | |
| 74LS drivers | 01/01/70 00:00 | |
| LED Driver - My Solution | 01/01/70 00:00 | |
| quite risky | 01/01/70 00:00 | |
| MCU-resistor-NPN | 01/01/70 00:00 | |
| 8051 is open drain ! | 01/01/70 00:00 | |
| not good idea | 01/01/70 00:00 | |
| totally wrong ! | 01/01/70 00:00 | |
| This I would take with a grain of salt. | 01/01/70 00:00 | |
| But nevertheless totally unsuited! | 01/01/70 00:00 | |
| Where in Atmel errata or other informati | 01/01/70 00:00 | |
| That's standard performance of quasi bi. | 01/01/70 00:00 | |
| Try This | 01/01/70 00:00 | |
updated | 01/01/70 00:00 |