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  1. Arouse1973

    ICSP in PIC18F4550 using LVP enabled

    Page 312 of datasheet " While programming using Single-Supply Programming, VDD is applied to the MCLR/VPP/RE3 pin as in normal execution mode. To enter Programming mode, VDD is applied to the PGM pin." Adam
  2. Arouse1973

    Wheatstone bridge output voltage

    Yes correct valid point. Adam
  3. Arouse1973

    Discharge path for buck-boost converter

    @kris snap
  4. Arouse1973

    Discharge path for buck-boost converter

    No the diodes not around the wrong way, this is fine. It's designed to reverse the polarity of the input voltage. This is a positive to negative buck-boost configuration. Buck boost being the name given to this kind of group configuration. Adam
  5. Arouse1973

    Blockage sensor

    Thinking optics if pipe is clear, or yes could drill a small hole but grain dust might be an issue sticking to the devices? The other thing I thought of was using sound to detect the movement of grain. Adam
  6. Arouse1973

    Wheatstone bridge output voltage

    The resistance of the wires is in the question. This will effect the balance of the bridge don't you think? Adam
  7. Arouse1973

    Blockage sensor

    No a multi meter won't detect static and also static levels vary with humidity so this won't be reliable. I suppose if you had a sensor on the outlet then this would indicate a blockage somewhere if no grain was flowing. Adam
  8. Arouse1973

    This might be a silly question...

    I don't quite understand what you are trying to do. Capacitor or batteries? do you mean, you want to make a battery out of parallel capacitors? Can you show us a drawing or what you think might work? Thanks Adam
  9. Arouse1973

    Blockage sensor

    When there is a blockage is the pipe likely to be empty, or is it either the pipe blocked or no flow when there should be that needs detecting. Adam
  10. Arouse1973

    Wheatstone bridge output voltage

    Do you think you might need to include the resistance of the wires connecting the strain gauges? Adam
  11. Arouse1973

    Fiddling with the I/O voltages of a transistor switch circuit

    Try a pull down resistor from the base to 0 Volts. Try a 1 Meg Ohm and see if that works. If it's still too slow replace the 100K input resistor with a 10K and now use a 100K pull down from base to 0 Volts. The pull down goes after the base resistor. You need to show us the comparator circuit...
  12. Arouse1973

    74HCT08: an IC beginning

    Hi Simon You need a pull down or pull up resistor depending on the logic level you want on the output. This is your first lesson :), don't leave input pins floating, tie them to one of the supply lines. Example if you are going to be exerting the pins high then you pull them low and vice versa...
  13. Arouse1973

    Getting into the industry

    I totally agree Dave, I have also experienced this in the past and actually right now. Students with no experience can easily became Wiki robots to impress the boss but when they haven't got the internet or find themselves out of their depth with something new, we the non academic ones come to...
  14. Arouse1973

    Getting into the industry

    Good call Dave
  15. Arouse1973

    Getting into the industry

    Ok I just thought of maybe becoming an apprentice if that's an option. The other thing you could try is maybe a temping agency. Adam
  16. Arouse1973

    Getting into the industry

    With out being rude can I ask your age? I am 41 BTW
  17. Arouse1973

    DC motor/generator needed to charge 14-20v battery

    Here is something I found that might work. http://2.bp.blogspot.com/-PPcOoP2sAXA/UQoAgIrNMTI/AAAAAAAAC3Y/a2yplAv7Yh8/s1600/simple+charger+controller+circuit.png Adam
  18. Arouse1973

    Using a Varistor to solve a back EMF problem

    Yeah I also wondered what that was :) Square D switch.
  19. Arouse1973

    DC motor/generator needed to charge 14-20v battery

    Use a constant current charging method. This way the current is limited and not the voltage, so as long as the voltage is below the maximum input allowed for the constant current source then I don't see why this shouldn't work. Adam
  20. Arouse1973

    Using a Varistor to solve a back EMF problem

    Although an MOV will protect the contacts from the flyback voltage produced by inductive loads it won't protect against inrush current. This may also need to be considered if the failing contacts are due to inrush currents from the capacitance of the load. Thanks Adam
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