Elecrical Current Aplifier

jamilsaif

Greetings,

Any Parallax module that works as Electrical Current Amplifier?

Thanks

Mike Green

What kind of electrical current do you want to amplify? You can use a Stamp or Propeller to measure small voltages and produce small voltages. The output voltage can be made different and related to the input voltage. By using a known resistance value, you can produce a specific current value given a specific voltage. All this is probably not quite what you want. If you want to amplify current, you need a transistor (Bipolar Junction Transistor ... BJT). There are all sorts of tutorials on simple current amplifiers on the Internet. If you want to amplify voltage, you can do it the same way, but a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) may be better since it's voltage sensitive. Again, there are lots of tutorials on the Internet. Here's one with links to others.

There are also integrated circuit amplifiers (op amps) for amplifying current or voltage. Look on the Internet for tutorials. Parallax does sell a simple one, the LM358. If you do a websearch for "LM358 tutorials", you'll get things like this one.