Post on 19-Dec-2014
description
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