HardLabs

Intercom

ukmaker·Intercom·Kicad/Intercom.kicad_pcb

Intercom PCB layout, top view — open source AVR/Arduino board by ukmaker

About the Intercom PCB

Intercom is an open source AVR/Arduino PCB design by ukmaker, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 100 mm, with 82 components from 42 distinct parts.

Its main chip is the ATMEGA328-P, from the AVR/Arduino family. Other key parts include the LM386, MCP6002, MCP1700T, LE33CZ and RFM12B. By type, the board carries 27 resistors, 26 capacitors, 7 diodes, 6 ICs, 5 connectors and 5 switches.

It belongs with the rf & radio and iot & wireless designs in this gallery.

From the project

Wireless intercom implemented using an Atmega328P and an RFM12B radio module

What Is it? ================== This project implements a wireless intercom system using the RFM12B radio module and the Atmega 328P microcontroller running the Arduino environment.

Why Does it Exist? =================== I wanted a wireless intercom so I could stop shouting up the stairs at the kids.

The consensus on the web was that the RFM12B is not suitable for speech: challenge!

Main components on the Intercom

ATMEGA328-PLM386MCP6002MCP1700TLE33CZRFM12B

Intercom bill of materials (BOM)

82 components, 42 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA328-P
IC1
1
LM386
U1
1
MCP6002
U2
1
MCP1700T
U3
1
LE33CZ
U4
1
RFM12B
U5
1
BF244A
Q1
1
IRFU3505
Q2
1
ZTX313
Q3
1
16MHz
X1
2
CONN_2
P1, P2
2
CONN_3X2
P3, P4
1
CONN_2X2
P5
1
MIC9.7MM
MK1
5
SW_PUSH
SW1, SW2, SW3, SW4, SW5
2
BAT43
D1, D2
5
LED
D3, D4, D5, D6, D7
1
100u
L1
2
1u
C1, C11
1
200n
C2
Show 22 more
QtyPartRefs
8
100n
C3, C6, C10, C19, C21, C22, C23, C26
1
470p
C4
2
22u
C5, C7
1
1200u
C8
2
47n
C9, C15
1
2n2
C12
1
100u
C13
1
220n
C14
1
22n
C16
1
1u
C17
2
2u2
C18, C20
2
22p
C24, C25
7
10K
R1, R2, R3, R4, R5, R14, R20
1
R
R6
2
1M
R7, R19
5
470R
R8, R24, R25, R26, R27
1
220K
R9
5
2K2
R10, R15, R16, R17, R18
1
1K
R11
1
10R
R12
1
100K
R13
3
1K
R21, R22, R23

Intercom design files

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

Intercom: common questions

What microcontroller does the Intercom use?

The Intercom is built around the ATMEGA328-P, from the AVR/Arduino family.

How big is the Intercom PCB?

The Intercom measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Intercom?

82 components, from 42 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 Intercom design files?

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

Can I use the Intercom design in my own project?

Yes, under the terms of its MIT license, which ukmaker chose for the repository.

Can I test firmware for the Intercom 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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