HardLabs

Blinking LED

bostang·PCBs·BlinkingLED/blinking_LED.kicad_pcb

Blinking LED PCB layout, top view — open source AVR/Arduino board by bostang

About the Blinking LED PCB

Blinking LED is an open source AVR/Arduino PCB design by bostang, published on GitHub. It is a 2-layer board measuring 55.9 × 69.7 mm, with 18 components from 17 distinct parts.

Its main chip is the C2797196, from the AVR/Arduino family. Other key parts include the LM7805_TO220. By type, the board carries 5 capacitors, 4 resistors, 3 diodes, 2 ICs, 2 switches and 1 crystal.

From the project

My repository for documenting all PCB Projects I have done

Rangkaian Pengedip LED 3 Warna menggunakan mikrokontroller ATMega328-P

Untuk menghitung resistor yang dibutuhkan seri dengan LED, kita bisa menggunakan rumus: $$ R = (Vs - Vf)/If

dengan Vs adalah tegangan pada pin ATMega328P : Vs = 5V

Vf adalah tegangan maju (forward voltage) LED

If adalah arus maju (forward current) LED If = 20 mA

1. LED Merah Tegangan Maju Vf = 2V R = (5V - 2V)/0.02A = 150 Ohm

Blinking LED, from the project README
From the project README

Main components on the Blinking LED

C2797196LM7805_TO220

Blinking LED bill of materials (BOM)

18 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C2797196
ATmega328-P
U1
1
LM7805_TO220
U2
1
16MHz
Y1
1
C2988620
9V
BT1
1
SW_Push
SW1
1
SW_SPDT
SW2
1
RED
D1
1
YELLOW
D2
1
1N4148W
GREEN
D3
1
100N
22p
C1
1
10U
22p
C2
1
100N
10n
C3
1
10U
10n
C4
1
100N
1n
C5
2
10K
R1, R4
1
120
10K
R2
1
470K
10K
R3

Blinking LED design files

The KiCad project lives in the bostang/PCBs repository on GitHub; these links point at the commit this page was built from.

Blinking LED: common questions

What microcontroller does the Blinking LED use?

The Blinking LED is built around the C2797196, from the AVR/Arduino family.

How big is the Blinking LED PCB?

The Blinking LED measures 55.9 × 69.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Blinking LED?

18 components, from 17 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Blinking LED design files?

From the bostang/PCBs repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Blinking LED design in my own project?

The repository has no license, so all rights stay with bostang. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Blinking LED without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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