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  1. dieselvette

    Assembly made of CE-certified components

    Hey all, If I build a simple product in which all electrical components (not electronics - just switches and fans) are CE certified from the manufacturer, and it is assembled in such a way so as to conform to all manufacturer instructions/specifications for each component, then is there any need...
  2. dieselvette

    Sensing temp without transmitter to PLC input?

    Anyone know of a temperature probe with mA or V output, that doesn't require an $80 transmitter? The purpose here is to read a temperature 60-150 degF and send it to an analog PLC input. Must be a way to do this without spending big bucks. After all, I have a temp sensor in my house with...
  3. dieselvette

    Using 5VDC sensor as analog input

    I would like to use a relative humidity sensor which operates on 5 Volts DC, and has a linear voltage output of 0.75v to 3.75v based on %RH. 1. What's the best/least expensive way to supply the sensor with 5 VDC? 2. Can the PLC interpret the input voltage if the sensor is powered from a...
  4. dieselvette

    Keeping program STATUS in PIC

    Does anyone know of a way I can keep the status of my PIC in memory indefinitely in the event of a power loss? For example, as the program is running power is lost for a month. When the system is powered up again, I want the program to pick up right where it was when it lost power. Nic Van...
  5. dieselvette

    Keeping memory in "smart relay"

    Does anyone know of a way I can keep the status of my "programmable logic relay" (Siemens LOGO in this case) in memory indefinitely in the event of a power loss? For example, as the program is running power is lost for a month. When the system is powered up again, I want the program to pick up...
  6. dieselvette

    Need to make control circuit diagrams for troubleshooting

    I currently am building the self-contained control system for a relatively simple machine which we build from the ground up. I am wondering if there are any good programs out there which allow me to draw a wiring diagram quickly and easily. I would prefer the diagram to be laid out as...
  7. dieselvette

    Need something simpler/smaller than a micro-plc

    Does anyone know of a programmable device that I can buy "off-the-shelf" for less than, say $75? I need to replace the Siemens Logo we currently use with something cheaper and/or smaller. Just an open circuit board would be perfect, doesn't need to be DIN rail mount or anything. Needs to have...

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