The weekly report summarizes progress on a zero spam circuit design for a microcontroller. It describes testing the original design which had a problem using negative power sources. A new design was created using a non-inverting circuit with only positive power sources and a diff amp circuit to adjust the zero spam. The strong point is it can now use a single power supply, while the weak point was originally not having negative power sources. The next steps are to connect it to microcontrollers and design a PCB.

1. [INC 281 MULTIDISCIPLINARY WORKSHOP WEEKLY REPORT] April 25, 2012
Name-Surname KritsakornWeekana
Student ID. 54261502
Group Name Id(instinct design)
Engineering Team Kung 2b
Members Mic 2b
Product Design P’ploy
Team Members P’jub
Weekly Progress
Today I tested the zero spam circuit The design for the microcontroller.
From that knowledge. sensor havean output 30mV-50mVmicrocontroller needs an input 0-2.5vBut
the design,Problem is with supplyno negativeSources.So new design .I used thenon inverting
circuitto make with positive souresonly and I useddiff amp cricuitfor adjust Zero-spam.
The circuit is as follows.
Figure zero-spam with single supplycircuit
Engineering Analysis
Strong Point
-can use with single supply
Week Point
-no NegativeSources.
Next Week Job
-connection with Microcontrollers.
-designpcb
Department of Control System and Instrumentation Engineering
KING MONGKUT’s UNIVERSITY OF TECHNOLOGY THONBURI