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Repeat after us: Heed all the safety precautions about soldering that we give you in Chapter 2. Use adequate ventilation when so ...

Making the receiver circuit ............................................................... The receiver circuit will eventually ...

Place the four RB5-5-S relays (Relay 1–Relay 4) and five 2N3904 (Q1–Q5) transistors on the breadboard, as shown in Figure 13-19 ...

VR1 Relay 1 Q1 Relay 4 Q5 Relay 2 Q2 Relay 3 Q3 Q4 Figure 13-19: Place the RB5-5-S relays, LM7805 voltage regulator, and 2N3904 ...

Insert wires to connect the ICs, voltage regulator, transistors, relays, and terminal blocks to the ground bus. Then insert wir ...

Insert wires to connect the ICs, the terminal blocks, relays, and the voltage regulator to the +V bus. Then insert wires betwee ...

Insert wires to connect the ICs, terminal blocks, relays, and discrete components, as shown in Figures 13-23, 13-24, and 13-25. ...

Receiver battery TB to input pin of VR1 Buzzer TB to collector pin of Q1 Pin 16 of Relay 4 to collector pin of Q5 Left sensor TB ...

Pin 5 of receiver module to Pin 4 of receiver module Pin 13 of Relay 4 to left motor TB Voltage output pin of VR1 to Pin 5 of re ...

Pin 12 of IC 1 to base of Q1 Pin 14 of IC3 to Pin 11 of Relay 3 Pin 11 of IC3 to right motor TB Pin 13 of IC 1 to base of Q3 Pin ...

Insert the following, as shown in Figure 13-27: Six 0.1 microfarad ceramic capacitors (C1, C3, C6, C7, C9, C11) Six 10 microfar ...

Use the following key for the callouts in Figure 13-27. C1 from +V bus to ground bus C2 from +V bus to ground bus C3 from +V bu ...

R1 from Pin 15 of IC1 to Pin 16 of IC1 R2 from Pin 6 of IC2 to Pin 7 of IC2 R3 from Pin 7 of IC2 to +V R4 from right sensor TB ...

Drill holes for the 6-32 screws used to mount the castor, as shown in Figure 13-29. Use the base of the castor to guide you whe ...

Drill a hole for 4-40 screws in each side of the small box to mount the sensors, as shown in Figure 13-32. Figure 13-31: A clo ...

Mount the sensors in the small box with one 4-40 screw and nut per sensor. Feed the wires for the sensors and the motors throug ...

Drill two holes for 6-32 screws to mount the buzzer, as shown in Figure 13-34. Figure 13-34: The buzzer and the on/off switch ...

Mount the buzzer by using two 6-32 screws and nuts. Drill a hole in the box where you will insert the on/off switch, as shown i ...

As you insert the wires, cut each of them to the length you need for them to reach the corresponding terminal block. Also, strip ...

Use the following key for the callouts in Figure 13-37. Red wire from buzzer Black wire from buzzer Red wire from receiver batt ...