Author: David Herres
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DAVID HERRES: Give ’em a break
The circuit breaker has saved a lot of lives. David Herres outlines the role and characteristics of a simple but effective device. Circuit breakers play a ... -
DAVID HERRES: Antenna systems
Satellite dish work can be a profitable sideline for electricians, as the tools and expertise are already in place. David Herres offers an overview. Construction workers ... -
DAVID HERRES: Don’t always wave goodbye
The microwave oven is a simple appliance, and repair is not difficult as long as the hazards are recognised. David Herres explains. The first microwave ovens ... -
DAVID HERRES: Let’s dish about dishwashers
Domestic dishwashers are practically standard equipment these days. David Herres outlines procedures for diagnosing and repairing them. Domestic dishwashers differ from the commercial units installed in ... -
DAVID HERRES: All about Wiggy
It makes appropriate sounds and it vibrates to let you know what’s happening. No, it’s not a mobile phone, writes David Herres, but a handy little ... -
DAVID HERRES: Gaining a laser focus
Despite the teachings of Austin Powers, lasers aren’t just designed to be attached to sharks’ heads. Electricians use them too. David Herres explains. -
On the tools: Field effect transistors
Field effect transistors are constructed similarly to transistors and diodes, but they have specific characteristics that pose unique challenges to electricians. David Herres explains. -
How to repair elevators
Every new multi-storey building has an elevator, which is a potential gold mine for electricians. David Herres explains the ups and downs of elevator maintenance and ... -
What is the smart grid?
When it becomes fully implemented, the smart grid will resemble an energy Internet, perhaps eventually worldwide. -
The A-Z of transistors
Transistors may be small but they are an important part on an electrical circuit. David Herres explains.
