Silicon Chip May 2009

This month some interesting real-world examples and articles of working in the electronics industry. Firstly, a light hearted look at working in the tech-support department, some of the common questions and frustrations from being in the front lines. Also the new HID lamps, these portable units are great for camping and offer high-efficieny and brightness. Finally, a look at why calibration of test equiment is important and also how to draw simple circuit diagrams on your computer, using the Protel Autotrax software.

This month’s projects includes a dead-accurate 6-digit GPS Clock, this unit receives the GPS signals to set and update your clock at regular intervals, no need to set and check your clock, it will always be accurate. Housed in an attractive case with large easy to read digits, this unit is ideal for the home or office. Also this month, a new high performance 230V 10A speed controller, this unit can be used with drills, routers, saws, lawn edgers and any device using a brush-type 230V motor. The unit offers smooth control for the full range of speeds from near zero to full speed. This month also includes a handy unit for checking the accuracy of your digital multimeter, the unit outputs a precision 10.000V output for calibrating and testing your measuring equipment. Finally a UHF remote control mains switch for 230Vac equipment, ideal for use on the farm or in the backyard, the unit can be used to switch pumps or sprinkler systems. All projects come complete with circuit diagram and electronic parts list.

Part Code: SILCHIPMAY2009

Features

• Terror Tales from the Front Line
• HID Lamps
• Why Calibrate Your Test Equipment
• How to Draw Circuit Schematics in Protel Autotrax

Projects

• Dead Accurate 6-Digit GPS-Locked Clock, Part 1
• 230Vac 10A Full Wave Motor Speed Controller
• Precision 10V DC Reference for Checking DMM's
• UHF Remote 2-Channel 230Vac Power Switch
• Input Attenuator for the Digital Audio Millivoltmeter

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