Greenpower dude
Newbie level 6
Hey guys and Gals!
I've been studying hard for uni and how that the holidays have started I've decided to get back on to building my thermostat for my fish tank. Now that I've been introduced to digital circuitry, I've decided to integrate some digital chips to replace analogue transistors, MOSFET's and capacitors to in my circuit design. The only problem is that each chip runs at a different voltage...
For example;
OPAMP:
+Vcc: 18V
-Vcc:-18V (?)-what does it need a negative 18V for?
ICM555:
+Vcc: 18V
74HC00,08, 76, 160
Vcc: 2V to 7V
I understand when an analogue chip is going to a digital chip I could put a 13V Zener diode between them to drop the voltage down, but from a digital to analogue chip I am not sure what to do.
Is there anyone out there with some advice?
Regards,
Geoff
I've been studying hard for uni and how that the holidays have started I've decided to get back on to building my thermostat for my fish tank. Now that I've been introduced to digital circuitry, I've decided to integrate some digital chips to replace analogue transistors, MOSFET's and capacitors to in my circuit design. The only problem is that each chip runs at a different voltage...
For example;
OPAMP:
+Vcc: 18V
-Vcc:-18V (?)-what does it need a negative 18V for?
ICM555:
+Vcc: 18V
74HC00,08, 76, 160
Vcc: 2V to 7V
I understand when an analogue chip is going to a digital chip I could put a 13V Zener diode between them to drop the voltage down, but from a digital to analogue chip I am not sure what to do.
Is there anyone out there with some advice?
Regards,
Geoff