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Group: CCM Project 1.2 EMERSON Emerson is a diversified global manufacturing company. Provides innovative solutions to customers in the following areas: Process Management Industrial Automation Network Power Climate Technologies Commercial & Residential Solutions Goal Emerson 24Vdc Monitor. This device will monitor for 24Vdc. Upon a decrease or increase of 5% of 24Vdc the device will record. Measurements include: Amplitude of the voltage Duration of the change in voltage Time at which the change occurred, and provide a waveform of the collected data. Remote Access Why our Solution? Other Devices are costly can be as great as $4000 These systems can be bulky The anticipated sample rate is much lower than most commercial products Remote Accessible Proposal The system we consist of: Protective circuit Comparator A Step down prior to the ADC MAX 1257 ADC Aliasing Filter Raspberry Pi 2 The Protection Circuit The Protection Circuit will consist of: A fuse Zener diode Other possibilities A small Breaker Raspberry PI 2 900MHz quad-core ARM Cortex-A7 CPU 1GB RAM Ethernet port for remote access Micro SD card slot for extra storage SPI interface for fast data transfer between ADC and the PI Low power consumption Easily Remote accessible MAX1257 Analog to Digital Converter 16 channel 12-bit ADC 25MHz SPI interface 225,000sps( samples per second ) ≈ 1 sample per 4µs Low power consumption 2.5mA at 225ksps -.3V to 6V analog range. Timeline Data Processing The Raspberry Pi will continuously take values from the ADC When the comparator sends an interrupt, the PI will record the last 100 values into memory along with a timestamp The comparator will be at logic level 0 when the voltage is <25V The comparator will be at logic level 1 when the voltage is >25V Remote Access Windows Remote Access: Using an SSH Client such as Putty Static IP Address By simply typing the IP address of the PI into the host name Testing the Power Monitor The system will be tested using a Pulse Transformer and a Signal Generator to create and control spikes in Voltage Budget Raspberry Pi 2 - $35 Maxim ADC 1257 – $25.43 Pulse Transformer - $ 4.79 Bread Board - $4.50 Misc. (resistors, fuses, wire) - $15 Total: $84.72 Question ????? At this point we will entertain questions