Donate SIGN UP
Home > Science > Basic circuits

Basic circuits

Avatar Image
catchinit | 17:12 Mon 18th Sep 2006 | Science
2 Answers
How do you work out the required value of resistors needed in a circuit containing a transistor?

For example, a basic moisture tester, 5V dc, contains an LED and a transistor and 2 open wires or prongs, which when touched onto moisture will completethe circuit. So what values do i need to know to start to work out the needed resistors to make the circuit work?
prev Tainted Spinah from California
  
next TNT ? No, flour or sugar will be fine !
Gravatar

Answers

1 to 2 of 2rss feed

Best Answer

No best answer has yet been selected by catchinit. Once a best answer has been selected, it will be shown here.

For more on marking an answer as the "Best Answer", please visit our FAQ.
Avatar Image Siamsal
People write whole books about such things. And you want an answer in a few lines?

In essence, you need to know the voltage there will be across the resistor and how much current you want it to pass.
20:01 Mon 18th Sep 2006
Avatar Image mibn2cweus
transistor biasing 1
05:33 Tue 19th Sep 2006

1 to 2 of 2rss feed

Do you know the answer?

Basic circuits

Answer Question >>