HardLabs

Transmitter

navneet-krishna·Wireless_Lamp_Switch

Transmitter PCB layout, top view — open source AVR/Arduino board by navneet-krishna

About the Transmitter PCB

Transmitter is an open source AVR/Arduino PCB design by navneet-krishna, published on GitHub. It is a 2-layer board measuring 70 × 85 mm, with 7 components from 7 distinct parts.

Its main chip is the Arduino_Nano, from the AVR/Arduino family. Other key parts include the nRF24L01, TTP223 and MT3608. By type, the board carries 3 ICs, 1 module, 1 battery holder, 1 switch and 1 capacitor.

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

From the project

Wireless lamp switch: Arduino Nano + nRF24L01 transmitter and relay receiver PCBs (KiCad 10)

Two 2-layer boards: a battery-powered Transmitter (touch-to-toggle) and a mains-switching Receiver.

Open either .kicadpro in KiCad 10. Both projects share the libraries through the local sym-lib-table / fp-lib-table`.

Transmitter: BAT+, BAT-, VINRAW, +5V, GND, TOUCHSIG, RF3V3, RFCE, RFCSN, RFSCK, RFMOSI, RFMISO

Receiver: +5V, GND, RELAYIN, RF, ACHOTIN, ACHOTOUT, AC_NEUTRAL

Main components on the Transmitter

nRF24L01TTP223MT3608Arduino_Nano

Transmitter bill of materials (BOM)

7 components, 7 distinct parts.

QtyPartRefs
1
nRF24L01
U1
1
TTP223
U2
1
MT3608
U3
1
Arduino_Nano
A1
1
2xAAA
BT1
1
SPST_Slide
SW1
1
10uF
C1

Transmitter design files

The KiCad project lives in the navneet-krishna/Wireless_Lamp_Switch repository on GitHub; these links point at the commit this page was built from.

Transmitter: common questions

What microcontroller does the Transmitter use?

The Transmitter is built around the Arduino_Nano, from the AVR/Arduino family.

How big is the Transmitter PCB?

The Transmitter measures 70 × 85 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Transmitter?

7 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Transmitter design files?

From the navneet-krishna/Wireless_Lamp_Switch repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Transmitter design in my own project?

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

Can I test firmware for the Transmitter 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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