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Equivalent Circuit

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At this stage you may not fully appreciate the link between the E-blocks you have connected together and the actual circuit. Have a look at the circuit diagram below. If you are in North America you may be confused by the boxes on the circuit diagram. This is the European way of representing a resistor in a schematic.

The Multiprogrammer houses the main PICmicro device, provides power to the whole system (battery V1), and provides connections to the other E-blocks (not shown on the diagram). On the Multiprogrammer there is a 10K resistor to +V: the reset switch which switches the (MCLR) pin to ground is not shown. Resistor R1 makes sure that the microcontroller is not at logic 0: not reset. The Multiprogrammer clock circuit of C1, R10 is simplified. This assumes your clock switches are in the RC, slow mode. The LED board has 8 LEDs with 8 resistors in series. This is represented by D0 to D7 and R2 to R9. On the switch board there are 8 push-to-make switches (S0 to S7), series current limiting resistors (R11 to R18), and pull down resistors (R19 to R26).

Whenever you connect an E-blocks system together you should be aware of the effective circuit you are making. You can look at the circuit diagrams to get a better idea of how each E-blocks board connects to the Multiprogrammer.

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