Ricardo Daniel de Paula- CH582M - 0.87$ USD
- SMD Inductor 0806 - 0.22$ USD
- 32MHz Crystal - 0.22$ USD
- LDO - 0.09$ USD
- capacitors and resistors - 0.10$ USD
TOTAL: 1.50$ USD in Components
Costs
A project log for Capacitive Touch Keyboard Business Card
A PCB business card that are a usb-c touch keyboard
Discussions
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How does the touchkey multiplexing work? The ch592 has 12 channels instead of 14, but is 25% cheaper. If the crystal can be omitted, you could shave off even more! Great project.
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