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Results tagged with system-design
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user 2881
This tag should be used for questions regarding the selection of components, deciding functionality, and other issues that may come up during the early stages of a project.
3
votes
Accepted
AVCC and AREF when using a reference voltage lower than 5V?
AVCC is the supply voltage pin for the A/D Converter, PC3:0, and ADC7:6. It should be externally connected to VCC, even if the ADC is not used. If the ADC is used, it should be connected to VCC thr …
- 11.3k
2
votes
What are the basic steps to make a printed circuit board?
Software packages are, amongst others
Fritzing (more target at beginners)
Eagle (free for board of size 100 x 80 mm (4 x 3.2 inches)).
KiCad (open source)
Companies that make you pcb in small quan …
- 11.3k
4
votes
Just sanity-checking a concept... poor man's self-monitored alarm system
NRF24L01+ for communication. Extreme low power if not sending. Detects packet loss, and automatically resend the packet.
You would however need a small arduino board at the sensor, to read the senso …
- 11.3k
1
vote
Accepted
Powering arduino and 12V Fan from same supply
Sounds fine.
You can connect the two fans in parallel, as long as they don't use more than 5A combined, as that is the maximum of the TIP120. Though you definitely need to attach a heatsink to the TIP …
- 11.3k