Serial Port Receiver From: Alejandro Gabriel Torrado - 2005-02-25 19:53:10 Attachments: Message as HTML ```Hi, I'm making the serial port receiver and I have a trouble. When winlirc is not running, the circuit receive a -10v. And when = winlirc is running, only=20 +2.15v, not the +8v the circuit needs. So, I'll need a low-drop who make it up to the 5v. The question is, if I connect this circuit to other computer who can = send the 8v the=20 circuit needs, what will happen? Will the low-drop chip limit it to the = 5v or will it send=20 the 8v directly and ruin the circuit? Thanks```

 Serial Port Receiver From: Alejandro Gabriel Torrado - 2005-02-25 19:53:10 Attachments: Message as HTML ```Hi, I'm making the serial port receiver and I have a trouble. When winlirc is not running, the circuit receive a -10v. And when = winlirc is running, only=20 +2.15v, not the +8v the circuit needs. So, I'll need a low-drop who make it up to the 5v. The question is, if I connect this circuit to other computer who can = send the 8v the=20 circuit needs, what will happen? Will the low-drop chip limit it to the = 5v or will it send=20 the 8v directly and ruin the circuit? Thanks```
 Re: Serial Port Receiver From: Andreas Seltenreich - 2005-02-25 20:51:12 ```Alejandro Gabriel Torrado writes: > +2.15v, not the +8v the circuit needs. > So, I'll need a low-drop who make it up to the 5v. > The question is, if I connect this circuit to other computer who can > send the 8v the This shouldn't be a problem since a low-drop regulator usually just decreases the lower bound of the difference between the input and output voltage of the regulator, the maximum input rating should be comparable to the non-low-drop ones. But you'll have to look into the data sheet to be certain. > circuit needs, what will happen? Will the low-drop chip limit it to the 5v or will it send > > the 8v directly and ruin the circuit? As long as you stay beyond the maximum ratings in the data sheet your circuit should be fine. HTH Andreas BTW: I find it rather awkward that you are sending html mail to mailing lists. This just increases the resource usage without adding information. ```