Electronics experts..
Discussion
: 
vixpy1 said:
I need to turn a 0.5v signal into a 2.0 volt signal, its been a few years since i did any base electronics!
What would i need?
What would i need?
What is it for ? As above you need some kind of amplifier, could be as simple as switching a transistor on and off with the 0.5V signal depends on what you need the 2.0 Volt signal to drive
Ben
I assume it's a 0.5V DC otherwise you wouldn't be asking. You need a DC-DC converter. Basically it's a square wave oscillator & some diodes. The Diodes are standard 1.4V to turn on in pairs (to fully rectify the square wave) and some trickery.
Get them from most electronic stores, just need to find the one to suite your needs, and as that's just one diode pair, you shouldn't have much trouble. If you want, I can dig out the circuit diagrams (or you can google for them if you need it ASAP) and you can knock one up pretty easy with a few components.
HTH
ETA - Just to make sure you know - they generally work with a constant(ish) voltage and provide a fixed current output, so the voltage is depedent on the impedance of the load.
An easier way is to use a basic oscillator cicuit that can be driven with 0.5 volts and use a transformer (4:1 ratio) to up the RMS voltage and drop the current and have a full wave rectifier and smoother circuit (based on the frequency of the driving oscillator). But finding decent transformers of that ratio is usually the hard part, and making them is a ball ache.
Get them from most electronic stores, just need to find the one to suite your needs, and as that's just one diode pair, you shouldn't have much trouble. If you want, I can dig out the circuit diagrams (or you can google for them if you need it ASAP) and you can knock one up pretty easy with a few components.
HTH
ETA - Just to make sure you know - they generally work with a constant(ish) voltage and provide a fixed current output, so the voltage is depedent on the impedance of the load.
An easier way is to use a basic oscillator cicuit that can be driven with 0.5 volts and use a transformer (4:1 ratio) to up the RMS voltage and drop the current and have a full wave rectifier and smoother circuit (based on the frequency of the driving oscillator). But finding decent transformers of that ratio is usually the hard part, and making them is a ball ache.
Edited by MTv Dave on Monday 6th November 17:13
Here's another one. If I have a three position switch and a 12v power supply (which, could have its own indipendant power supply of a lot less),a nd I wanted to use a motor to turn somehting through 120 drgress each time- so position one on the switch would be 120 drg, position 2 wouldbe 240 deg, position would be 360 deg etc. What do I need?
(I promise its not because I have a redundant 3 position switch in the Aston, and revolving plates really appeal to me. Not at all...)
(I promise its not because I have a redundant 3 position switch in the Aston, and revolving plates really appeal to me. Not at all...)
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