email Colin Mitchell: talking@tpg.com.au For our other free eBooks:
50 - 555 Circuits
1 - 100 Transistor Circuits
101 - 200 Transistor Circuits
100 IC Circuits
For a list of every electronic symbol, see: Circuit Symbols.
For more articles and projects to suit the hobbyist: see TALKING ELECTRONICS WEBSITE
INTRODUCTION
This e-book covers a number of interesting circuits.
They have been presented for a reason.
The original circuits come from an Indian Electronics Magazine and most of them had faults. Either they were over-designed, poorly designed or contained a fault.
In the process of bringing these faults and corrections to you, we have created this eBook of 70 Interesting Circuits.
You can lean a lot from other peoples mistakes. Not only will you remember not to make the same mistake but the corrections and improvements generally require less components.
The art of designing a circuit is to make it as simple as possible and use the least number of components.
But before you put a design into production, get someone else to look at it.
Another "set of eyes" will see things differently and maybe simplify or improve the design.
We have already presented a set of pages called "Spot The Mistake," showing dozens of faulty circuits and how to check and test things before releasing them. It is surprising that a magazine with a readership of over 1,000,000 could publish items with glaring faults.
The faulty projects in this collection have a revised circuit included in the article and you can compare the two designs. It only takes a minute to see a circuit will not work and a few more minutes to create a improved design.
This is what we are teaching in this section . . . how to look at a circuit with a "critical eye" then design an improvement.
This is called REVERSE ENGINEERING and involves the highest level of technical skill.
But it is also the fastest