Re: Newbie: Simple amplifier and voltage to current converter

Chris wrote:

On Dec 13, 8:22 am, Chris <cfoley1...@xxxxxxxxx> wrote:

On Dec 13, 7:26 am, harry...@xxxxxxxxx wrote:


Hi everybody

I new to electronics and I need your help. I am experimenting with a
microcontroler and I want a 0-5V output to make it 0-10Volt....can
you tell me where I can find a simple circuit to implement?

Another option is to covert the 0-5V to4-20mA. Can I do it in a
simple way?

Thank you

Harry

If you've got a 0-5V output and a 12VDC supply, it's easy with an op
amp (view in fixed font or cut&paste to M$ Notepad):

|
| .----------.
| | |
| | |
| | uC | 1/2 LM35
| | |
| | |Analog output +12V
| | | 0-5V |\|
| | o----------------|+\ 0-10V Out
| | | | >---o-------o
| | | .---|-/ |
| | | | |/| .-.
| | | | === | |10K
| | | | GND | |
| | | | '-'
| | | | |
| | | '----------o
| | | |
| | | .-.
| | | | |10K
| '----------' | |
| '-'
| |
| ===
| GND
(created by AACircuit v1.28.6 beta 04/19/05www.tech-chat.de)


<snip>

Cheers
Chris



Sorry -- a small tweak. If you're deriving your +5V supply from the
+12V supply (a good idea), or if the +12V supply is turned on first,
the high impedance potential at the uC output pin could see a higher
voltage than the uC power supply, which will cause the uC to latch up
at turnon and possibly damage it. Simple fix:

|
|
| .----------.
| | |
| | |
| | uC | 1/2 LM35
| | |
| | |Analog out +12V
| | | 0-5V |\|
| | o------o---------|+\ 0-10V Out
| | | | | >---o-------o
| | | .-. .---|-/ |
| | | 22K| | | |/| .-.
| | | | | | === | |10K
| | | '-' | GND | |
| | | | | '-'
| | | === | |
| | | GND '----------o
| | | |
| | | .-.
| | | | |10K
| '----------' | |
| '-'
| |
| ===
| GND
|
(created by AACircuit v1.28.6 beta 04/19/05 www.tech-chat.de)

Cheers
Chris

Ok, Am I the only one having a problem with the above component
being used which is a temperature sensor if I remember ?
LM35 ?
Maybe the OP meant a LM358 ?


--
"I'd rather have a bottle in front of me than a frontal lobotomy"
http://webpages.charter.net/jamie_5

.

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