Timeline for Changing the brightness on a Hitachi HD44780 LCD screen
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 21, 2015 at 0:47 | comment | added | Ricardo | @wara - That's a Field Effect Transistor (FET), not a BJT. So you'll be looking to connect its drain, source and gate. In any case, you'll get better help by asking a separate question, linking to this one. | |
| Jun 21, 2015 at 0:30 | comment | added | warath-coder | I know this is "old", but hope someone will notice this... I'm having trouble understanding how the transistor connects (as i'm not familiar with the icon above for the transistor), where does the E, B, C connect to? | |
| Mar 28, 2014 at 12:42 | comment | added | Ricardo | @Madivad - I'm guessing it's to increase maximum dissipated power that the resistors can take. The two 68R resistors in parallel result in an equivalent 34R resistence but doubles the maximum power that can be dissipated through a single resistor. I don't remember what resistors were recommended by Freetronics, but in my case, I've used two 1/4W 68R resistors and the board is working ok. Also, I suppose that 68R resistors are more common. That certainly holds true for me as I have plenty of 68R resistors in my bins and no 33R ones. | |
| Mar 28, 2014 at 12:27 | comment | added | Madivad | +1 for the schematic, although I'm not sure why there are two resistors (R7 & R8). | |
| Mar 27, 2014 at 3:22 | history | answered | Ricardo | CC BY-SA 3.0 |