Timeline for Confusion over Transistors for a switching circuit with an Arduino Mega 2560
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Jan 31, 2018 at 17:06 | comment | added | David Robilliard | Hi, I have tried it on led.linear1.org/led.wiz and it agrees with you about a 330Ohm, my mistake, sorry. | |
| Jan 31, 2018 at 16:57 | comment | added | tttapa | @DavidRobilliard: the calculator you used is for LEDs in parallel, you have your LEDs in series. Running LEDs in parallel on a single resistor is not recommended. | |
| Jan 31, 2018 at 16:46 | comment | added | David Robilliard | I used kitronik.co.uk/blog/led-resistor-value-calculator to get the resistor value, and I've just double checked and it tells me that 3 in series, powered by a 12V power supply would need a 220Ohm resistor in line. I will look into the calculations that you've sent to try and work it all out. Thankyou for your response. | |
| Jan 31, 2018 at 16:34 | history | answered | tttapa | CC BY-SA 3.0 |