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PCB Wizard 3 Tutorial 3
Drawing a test probe circuit
Step 1 of 10: Introduction This tutorial shows you how to design and make a test probe with PCB Wizard. You should follow this tutorial to learn the basic skills you will need to use PCB Wizard effectively. Difficulty Level: Advanced (suitable for experienced users) Components To make this circuit you will need: 14-pin dual-in-line (DIL)socket 4011B integrated circuit (IC) Red LED Green LED 2 x 680 ohm resistors:
Blue, Grey, Brown and Gold (4 b and) Blue, Grey, Black, Black and Gold (5 b and)

Getting started You will design and make a test probe. Once built, the test probe can be used to identify the most common circuit problems such as broken tracks, faulty components and loose connections. Along the way, you will learn how to:Add components from the Gallery Change component values and models Convert the circuit into a PCB layout Automatically route the circuit Make a non-rectangular board Add a solid copper area Add text to the board View how the finished PCB will look

120K ohm resistor:
Brown, Red, Yellow and Gold (4 band) Brown, Red, Black, Orange and Gold (5 band)

PP3 battery and clip plus suitable PCB making equipment

Completed circuit At the completion of this tutorial, you will have drawn both a circuit diagram (a) and a printed circuit board (PCB) layout (b) for a test probe circuit.

(a)

(b)

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PCB Wizard 3 Tutorial 3
Drawing a test probe circuit
Step 2 of 10: Adding components Youwill begin by creating a new (empty) document in which to draw your circuit. To create a new document, click on the New button or choose New from the File menu. Next you will learn how to use the Gallery to add components to your circuit. If the Gallery is not currently open, click on the Gallery button on the top toolbar to open it. Select the Circuit Symbols option. In the Circuit Symbol Gallerywindow, you will be able to see all the components that are available within PCB Wizard. Components within the Gallery are grouped according to their function. At the top of the window, a drop-down list box allows you to select which group is shown. From the Power Supplies group, add a Battery component from the Gallery to your circuit. To do this: Move the mouse over the Battery symbol. Pressand hold down the left mouse button. With the left mouse button still held down, move the mouse to drag the symbol onto the circuit. Finally, release the mouse button when the circuit symbol is in the required position. To make the test probe circuit you will also need several other components. Add a 1 pin Single-In-Line (SIL) from the Input Components group; three Resistors from the PassiveComponents group; two 4011B NAND Gates from the ICs (4000B Series) group and finally two LEDs from the Output Components group. It will help later on if you position the components neatly before you start adding wires to the circuit. You can move components by clicking on the Select button from the top toolbar. In Select mode the cursor will appear as a standard pointer:
Pointer cursor

Using theabove layout as a guide, try repositioning the components. Thinking about the position of components at the start can help produce a much neater circuit diagram. Once positioned, wire the components together as shown. For more detailed help and information on wiring circuits, refer to the topic entitled Wiring components together in the Help.

Copyright © 1997-2003 New Wave Concepts Limited. Allrights reserved. w w w .ne w -wave-concepts.com

PCB Wizard 3 Tutorial 3
Drawing a test probe circuit
Step 3 of 10: Changing component values and models With the circuit diagram drawn, you can now start to adjust the components. In your circuit, resistors R1 and R2 will be used to limit the amount of current that passes through the two LEDs. It is good practice to include current-limiting...