How to wire a transistor?

Question

Dear: Element 14

Hello it is me Noah again as you may remember me from my last post I am trying to build an arduino rocket controller and I am at prototyping stage. First of all you should know that I am using transistors BD712 which a pnp transistor that I need to amplify a current. The reason I need it to amplify a current is because I need it to increase 5V to 7.5V and to then send the current to my fixed barrier terminal blocks where it will then detonate the rocket motors. You see first of all in order you need a base resistor that connects to ground. The reason you need that is to prevent the board from short circuiting. I have placed several base resistors at several points and according to wikipedia I think I am doing this right. It says on wikipedia that I should do this.

And this is what I did.

Please can you help me because I am not even sure what a transistor is?

michaelwylie · Accepted Answer

The regulator will take an input voltage and transform it to a new level. You can increase the voltage, or decrease based upon an input voltage. A 7909 regulator can deliver 9 volts at 1 AMP. The output voltage will always be 9 Volts as long as the input never drops below a threshold value. This is a typical linear regulator (old technology). You can also increase voltages using boost regulators.

michaelwylie · Answer

The reason I need it to amplify a current is because I need it to increase 5V to 7.5V and to then send the current to my fixed barrier terminal blocks where it will then detonate the rocket motors. 
 Look up Voltage Regulators -> Boost Regulator. I think this is the best solution for you, although it doesn't answer your question...

michaelwylie · Answer

1. Start with figuring out how much current your load will need and at what voltage (power). Then try linear technologies and look for a regulator that can deliver that output voltage at the rated current.

2. How much current are we talking about?

How to wire a transistor?

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