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
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.
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.
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.
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.
I 💘 Electronics