Numeracy Test. Electrical interview questions with answers. 50 Life Secrets and Tips. Memorize something everyday.Not only will this leave your brain sharp and your memory functioning, you will also have a huge library of quotes to bust out at any moment. Poetry, sayings and philosophies are your best options.Constantly try to reduce your attachment to possessions.Those who are heavy-set with material desires will have a lot of trouble when their things are taken away from them or lost.
Possessions do end up owning you, not the other way around. Become a person of minimal needs and you will be much more content.Develop an endless curiosity about this world.Become an explorer and view the world as your jungle. Stop and observe all of the little things as completely unique events. Try new things. Read “Zen and the Art of Happiness” by Chris Prentiss.This book will give you the knowledge and instruction to be happy at all times regardless of the circumstances. Simple Door Alarm Circuit. This is a simple – easy to build – alarm circuit. For power – I used a small 9-volt battery. But the circuit itself will work from 5 to 15-volts – just choose a buzzer that’s suitable for the voltage you’re using. The standby current is virtually zero – so the battery life is good. The whole circuit is built around a Cmos 4001 14 pin IC.
If SW1 is fitted to a door – every time the door opens the Buzzer will give a short beep. But – by increasing these values – you can achieve an output time of up to half-an-hour or more. I’ve drawn SW1 as a magnetic-reed switch; but you can use any type of switch that suits your application. Changing the Output Time Generally speaking – the length of the output time is proportional to the values of R2 and C2. For example, if you replace R2 with a 4M7 resistor you will increase the output time by a factor of about 5.
If you want an accurate output time – use a variable-resistor (or preset) in place of R2. And here is the PCB layout. Drawspace.com - Learn to draw. Electrical projects. Electronics | Final Year Projects. Electronic Circuits. Here are some neat circuits you might want to try. The schematics and printed circuit board patterns are GIF's, and may show up different on some browsers. You might want to save the images (especially the PC board patterns) to your hard drive, load them into a photo editor (Photoshop, Paint Shop Pro, The GIMP, etc.) and adjust the size before you transfer the pattern to a board. Printed circuit board patterns are available possible. This page is always under construction and there will be new additions from time to time.
Some of these circuits were designed by me, most are not. Whenever possible I have tried to credit the author of a circuit but since many of these circuits are from my personal collection that I have gathered over a period of many years, this information is not always available. You can rank circuits according to how much you like a circuit by clicking on the lightning bolt icons. Circuits are divided into categories as listed below. Top 40 Useful Sites To Learn New Skills. The web is a powerful resource that can easily help you learn new skills. You just have to know where to look. Sure, you can use Google, Yahoo, or Bing to search for sites where you can learn new skills , but I figured I’d save you some time. Here are the top 40 sites I have personally used over the last few years when I want to learn something new.
Hack a Day - Hack a Day serves up fresh hacks (short tutorials) every day from around the web and one in-depth ‘How-To hack’ guide each week.eHow - eHow is an online community dedicated to providing visitors the ability to research, share, and discuss solutions and tips for completing day-to-day tasks and projects.Wired How-To Wiki - Collaborate with Wired editors and help them build their extensive library of projects, hacks, tricks and tips. Browse through hundreds how-to articles and then add to them, or start a new one.MAKE Magazine - Brings the do-it-yourself (DIY) mindset to all of the technology in your life.