Omnetics Mainheader April 2025
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3D Christmas Tree

A 3D PCB with a Low-Cost, 32-bit Microcontroller

3D Christmas Tree
3D Christmas Tree
The nights are long, and the glittering displays in city centers may catch your eye, but they could also drain your wallet. However, you can achieve the same sparkle with homemade items. And your bank account will be happy if you use inexpensive electronics such as a microcontroller for just 10 ¢. So, how about this modern pre-Christmas lighting idea?
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Materials

Component list

Component List

Resistors

R1...R16 = 1 k, 1%, SMD 0603

R17, R18 = 10 k, 1%, SMD 0603

 

Capacitors

C1, C5 =100 n / 50 V, SMD 0603

C2 = 10 µ / 25 V, SMD 0805

 

Semiconductors

D1, D5, D9, D13 = LED, red, 5 mm

D2, D6, D10, D14 = LED, green or orange, 5 mm

D3, D7, D11, D15 = LED, blue, 5 mm

D4, D8, D12, D16 = LED, yellow, 5 mm

U1 = CH32003F4P6, TSSOP20

 

Miscellaneous

BT1 = 3V CR2032       

SOCKET CR2032

SW1 = TPS526, C&K (Littelfuse)

PCB

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