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100nF 16V ceramic capacitor |
x 3 | |
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10uF 16V tantalum capacitor |
x 2 | |
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1uF 16V ceramic capacitor |
x 2 | |
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15pF 16V ceramic capacitor |
x 2 | |
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22 Ohm resistor |
x 2 | |
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10 kOhm resistor |
x 2 | |
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1.5 kOhm resistor |
x 2 | |
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SMD 0603 LED |
x 3 | |
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ATMEGA32U4-AUMicrochip Technology
|
x 1 | |
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16MHz crystal |
x 1 | |
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Polyfuse |
x 1 | |
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SMD Push button |
x 1 | |
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Ferrite bead 100 Ohm |
x 1 | |
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Micro USB connector |
x 1 |
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KiCADKicad
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A custom ATmega32u4 board
I decided to make my own ATmega32u4-based microcontroller board for several reasons. I wanted to have a general design based on this microcontroller which I can adapt in other PCB designs that need a microcontroller. I also wanted to practice SMD soldering, PCB design in general, and I needed some new microcontrollers so this was kind of a win-win situation.
I added an interactive BOM so you can pick the parts more easily.
Parts Value and footprint
C5, C7, C10 - 100nF C_0603_1608Metric
C2, C6 - 10uF CP_EIA-3528-12_Kemet-T
C4, C11 - 1uF C_0603_1608Metric
C8, C9 - 15pF* C_0603_1608Metric
R2, R3 - 22R R_0402_1005Metric
R4, R7 - 10k R_0603_1608Metric
R5, R6 - 330R R_0603_1608Metric
R1 - 1k5 R_0603_1608Metric
D1, D2, D3 - LED LED_0603_1608Metric
U1 - ATmega32U4-AU TQFP-44_10x10mm_P0.8mm
Y1 - Crystal Crystal_SMD_5032-2Pin_5.0x3.2mm
F1 - Polyfuse Fuse_1812_4532Metric
SW1 - SW_Push SW_SPST_PTS645
FB1 - 100R L_0805_2012Metric
J0 - USB_B_Micro USB_Micro-B_Amphenol_10103594-0001LF_Horizontal
Notice:
- C8 and C9 depend on the load capacitance of the crystal! You might have to use different value than mine.
- The open side of the LEDs' courtyard is the positive (VCC/anode) side. See: interactive BOM
A custom ATmega32u4 board
*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.
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