what do these part look like? - Electronic Circuits Projects Diagrams Free

Maxer · 27th October 2004, 10:35 PM

wanna make a lie detector, what is a
5K Pot
0-1 mA Analog Meter
what do these parts look like?
thanks max

Maxer · 27th October 2004, 10:51 PM

would this be a good or correct 5k pot for the lie detector test? i am about to purchase a few
thanks
Max

bmcculla · 27th October 2004, 10:54 PM

Pot is short for potentiometer which is a variable resistor. The 5K is the maximum resistance. Pots have 3 legs and will have a knob or screw that lets you change the resistance.

An analog meter could be a couple things but most likely its an electromechanical indicator - a needle with an electromagnet that moves the needle based on voltage

You might want to start with something a little easier than a lie detector. Try building a couple op-amp amplifier circuits first - these will be easier to test and less frustrating.

Maxer · 27th October 2004, 11:03 PM

Quote:

Originally Posted by bmcculla

Pot is short for potentiometer which is a variable resistor. The 5K is the maximum resistance. Pots have 3 legs and will have a knob or screw that lets you change the resistance.

An analog meter could be a couple things but most likely its an electromechanical indicator - a needle with an electromagnet that moves the needle based on voltage

You might want to start with something a little easier than a lie detector. Try building a couple op-amp amplifier circuits first - these will be easier to test and less frustrating.

thank you for explaining
where can i find these op-amp amplifier circuits? what is the primary purpose for these?
thanks
max

bmcculla · 27th October 2004, 11:10 PM

If you do a google search for op-amp circuits you should get tons of hits.

Opamps are an easy component to use to amplify signals. There are tons of ways to use opamps: filters, voltage to current converters, Waveform generation, etc.

You should try a simple inverting amplifier and non-inverting amplifier to start.

Optikon · 28th October 2004, 05:08 AM

Quote:

Originally Posted by bmcculla

Try building a couple op-amp amplifier circuits first - these will be easier to test and less frustrating.

Hopefully the author builds only pretested designs to get his feet wet.

Haphazard work is a surefire way to frustration!

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27th October 2004, 10:35 PM	(permalink)
Maxer	what do these part look like? wanna make a lie detector, what is a 5K Pot 0-1 mA Analog Meter what do these parts look like? thanks max

27th October 2004, 10:51 PM	(permalink)
Maxer	would this be a good or correct 5k pot for the lie detector test? i am about to purchase a few thanks Max

27th October 2004, 10:54 PM	(permalink)
bmcculla	Pot is short for potentiometer which is a variable resistor. The 5K is the maximum resistance. Pots have 3 legs and will have a knob or screw that lets you change the resistance. An analog meter could be a couple things but most likely its an electromechanical indicator - a needle with an electromagnet that moves the needle based on voltage You might want to start with something a little easier than a lie detector. Try building a couple op-amp amplifier circuits first - these will be easier to test and less frustrating.

27th October 2004, 11:10 PM	(permalink)
bmcculla	If you do a google search for op-amp circuits you should get tons of hits. Opamps are an easy component to use to amplify signals. There are tons of ways to use opamps: filters, voltage to current converters, Waveform generation, etc. You should try a simple inverting amplifier and non-inverting amplifier to start.