Electronics Design
Electronics Design
This week we learned electronics design through redesigning the echo hello-world board, improvise to our own version, make it and test it.
Schematic & Board
Draw schematic on Eagle
The components: Microcontroller, 'Pull-up' resistor, Capacitor, Crystal Oscillator, SMD Bus Connector, FTDI Connector.
Lay out the board
Auto-routing
Eagle has the auto-routing method. Though not smart enough, yet save a lot of time for wiring it. Parameters like milling width, clearance, trace type, efforts are tunable.
Traces
Fail #1
The space in between two traces is too small that the trace cannot mill it correctly. So I need to go back to the clearance page to adjust it.
Layout two
Routing
Fail #2
The milling header is too hight that it can't mill through. So I calibrate the height based on the height of the middle part of the board, instead of the border of the board which is a bit higher.
Milling
Connection
The two lines on the top right are too close to each other, that they remain connected after the milling.
So I manually disconnected it.
Soldering
I 💘 Electronics
Air wires
Testing