T-Shield V2.0

Flexible circuitry for wearable & physical computing prototypes

zohar messeca-fara | yair reshef

T-shield V2.0 Development is a Continuation of T-Shield V1.0 Research.

We Have Decided To Add A Wireless RF Communication Capability To The New T-Shield Version

And Also Needed A Better Interface For Uploading Code and Debugging then We Had in Early T-Shield Version With The Pro Mini MCU .

We Decided To Use Arduino Nano Board Instead Its Cheap And Relatively Small with A Mini USB Socket.

And Also Based on ATMEL328 Chip (which is Equivalent To Arduino UNO Specifications).



– Flexible PCB (Pyralux)

 – Wireless RF Communication Based on NRF24L SMD Module.

– 4 MOSFET Channels 3A Max. With PWM Control and additional Circuit incl. Diode/Drop Down Resistor.

 – Easy Connection To Computer Uploading Code and Debugging

Flat And Compact Design.

T-shield V2.0 Layout Design:
Nano (Full GPIO) / NanoRF (Wirless)

Early Attempts

Copper Tape Stencil Cutting Process with Silhouette CAMEO A3 stencil cutter. 

Photolithography Process Using Photoresist Dry Film (AliExpress) & Pyralux
UV Exposure – we dident have a propper UV box back then so we exposed the circuit to sun light for 30sec (israel).

Removing UnExposed Photoresist Dry Film – Soudium Carbonate 2g:200ml water Solution

Etching Using Ferric Chloride
ferric 1:1 water (50°C)

Removing Photoresist Dry Film From Traces –  Sodium Hidroxyde solution or scrub the board with steel wool and acetone.
sodium hidroxyde
2g : 100ml water