FEELING BORED WITH BREAD BOARDS AND GHOST LOOKING WIRES????

EVER THOUGHT TO GET RID OF THAT????

BYP.SAI KAMAL10BA1A04434th year ECE

CIRCUIT SCRIBE

OVERVIEW: HISTORY EXISTING ONE PROPOSED ONE CONDUCTING INK WHY SILVER? INGREDIENTS EQUIPMENTS PROCESS PENS PROS CONS CONCLUSION

HISTORY

Inventor of circuit scribe

Director of STEM outreach

Multiple tools for low cost ,high quality electronics.

Co-founder

2nd place in national collegiate competition

ANALISSA RUSSO

BRETT WALKER

Breadboard- Clumsiness

Vero board- Unreliable

PCB-fixed circuits

EXISTING ONE

Bread board

Printed circuit board

Vero board

PROPOSED ONE:

Roller ball pen with conductive silver inkAs easy as doodling

CIRCUIT SCRIBE

CONDUCTING INK

Results in printed object which conducts electricityClassed as fixed high solid systems or PTF polymer

Why SILVER???

Generally any conductor – 10^18 to 10^23 atoms /unit cell

Ag-(+1)Cu-(+2)Au-(+2)Al - (+3)

IS THAT EASY TO PREPARE THE CONDUCTING INK???

INGREDIENTSCommon solvents- Water Ethanol Methanol

Metal Precusor - Silver Nitrate Capping agent - Poly acrylic acid

Binder - Hydroxy Ethyl

Reducing agent - Diethanol amine

EQUIPMENTSBeakers and flasks

Stir plate

Centrifuge

Homogenizing mixer

Heated sonic bath

Syringe and filter

PROCESS20g Agno3 into water +1.915g of PAA + 40g

DEA

Sonicate for 1.5hrs at 65degrees+300ml

ethanol

Centrifugation (9000 rpm,20 minutes)

PROCESS

HEC in 1:1 H2o methanol homogenizing

mixer(3min 2000rpm)

Ready

Filter the obtained solution

2 types 1.Standard- CW2200STP-avg of 2mm width2.Micro – bit difficult to handle

PENS

PROS

STEM Education

Low cost high quality electronics

Flexible electronics

Lifetime working capacity

CONSKeep out of reach of children

Cost is bit high/pen

Can’t erase once drawn

CIRCUIT DESIGNSMAKEY MAKEY PLATFORMINVITATION CARDSFASHION MEHENDISMALL PROTOTYPES

APPLICATIONS

FUTURE SCOPEYet to design inductors, capacitors.Replaces all the discrete

components.

CONCLUSIONEach technology has its own pace of

development. Future promises us more.

REFERENCES

http://laughingsquid.com/circuit-scribe-a-pen-for-drawing-electrical-circuits-with-conductive-ink/

https://www.kickstarter.com/projects/electroninks/circuit-scribe-draw-circuits-instantly/?ref=kicktraq

http://en.wikipedia.org/wiki/Conductive_ink

QUERIES