Pages: 1 [2]   Go Down
Author Topic: Controling a 9v supplied CMOS with Arduino's 5v  (Read 3462 times)
0 Members and 1 Guest are viewing this topic.
Global Moderator
Boston area, metrowest
Offline Offline
Brattain Member
*****
Karma: 524
Posts: 26420
Author of "Arduino for Teens". Available for Design & Build services. Now with Unlimited Eagle board sizes!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Well,
The pins are comparable to say 20K resistors. The 100K resistor will limit the current from the 9V source to 0.09mA, so the output would be like 1.8, so that could be okay.
Logged

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

Gatineau, Qu
Offline Offline
Jr. Member
**
Karma: 1
Posts: 94
Did you Arduino today?
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

OK this is almost working......but I'm only getting 5.5v at the gate? I guess the 100k  pullup resistor is to big? How low can I make the pullup resistor to get more voltage but not harm the Arduino pin?

Soooooooooooooo close!
Logged

Pages: 1 [2]   Go Up
Jump to: