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Posts posted by gramo

  1. I am coming from a beginners perspective. Someone who is learning electronics.

    Reading and following the examples, and having many of the components already in place is brilliant. They introduce the use of breadboards, circuit wiring, and general electronics in a safe constructed manner. There

  2. audioguru's comments made plenty of sense to me, reading over the last few threads.

    25mA is the absolute maximum current rating from a PIC, exceeding this will lead to putting the device under conditions that will deteriorate its life span.

    Pulsed or constant, absolute is absolute

  3. Why not use a Pot? You could set a reference voltage quite easily, and you should already have a rather stable power supply for your PIC


    Wind the POT's to the required resistance and check them with a multimeter and your set.

    If for some reason your voltage regulator decides to conduct harder/less than the voltage Vref (the reference for your ADC conversions) on your PIC is also going to be affected proportionally.

    Eg; Vout from reg rises too 5.2 Volts, therefore the output of the potentiometers will rise by 0.2V but so too will what ever Pin (probably Vcc) you have as a reference for the ADC conversions, so your PIC will still read 2.26 or 3.673 volts (well the analogue equivalent), as its a digital representation of Vref

  4. Proteus is unbelievable, supports PCB auto placement and routing (the auto routing tool is a shear dream, and can be configured too auto route in different ways)

    ISIS(part of Proteus) allows you too build the circuit and test your PIC/AVR/other programmable device in near real time in a complete virtual sim environment, you can throw in virtual instruments from DC volt meters to oscilloscopes too Virtual Terminals To test your circuit/design.

    Then Click "Ares" and choose the PCB packages for the components you have used, click auto place and auto route - done!

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