Hi all! Let me begin by saying I am a newbie, who having built a pressure sensing prototype using an arduino, is now trying to build a standalone pressure sensor.
My major challenge right now is trying to reduce the size of the overall prototype to where I can ideally run off of coin cell batteries or 3 AAs.
But I really don't think I understand the process of evaluating the power needs of a given project. Most of the newb resources just assume a 5V power supply...
What would be most helpful for me is if somebody could walk me through how in this project the author knows to use a 5V power source. I looked at the datasheets of all components used and couldn't quite figure this out.
(My project seems most similar to this one):
http://www.avrprojects.net/index.ph...ter&catid=38:avr-projects-with-leds&Itemid=58
For reference:
Attiny2313 VCC: 1.8 - 5.5V
TCN75 (Temp Sensor) Operating Voltage: 2.7 - 5.5V
Individual LEDs Forward voltage (whatever that means?): 1.8V
LED Forward Current: 30mA
All help is seriously appreciated!
My major challenge right now is trying to reduce the size of the overall prototype to where I can ideally run off of coin cell batteries or 3 AAs.
But I really don't think I understand the process of evaluating the power needs of a given project. Most of the newb resources just assume a 5V power supply...
What would be most helpful for me is if somebody could walk me through how in this project the author knows to use a 5V power source. I looked at the datasheets of all components used and couldn't quite figure this out.
(My project seems most similar to this one):
http://www.avrprojects.net/index.ph...ter&catid=38:avr-projects-with-leds&Itemid=58
For reference:
Attiny2313 VCC: 1.8 - 5.5V
TCN75 (Temp Sensor) Operating Voltage: 2.7 - 5.5V
Individual LEDs Forward voltage (whatever that means?): 1.8V
LED Forward Current: 30mA
All help is seriously appreciated!