[sdiy] converting a 10v p to p to a 0-5 volt signal

Dave Kendall davekendall at ntlworld.com
Wed May 20 15:02:57 CEST 2009


Correct me if I'm wrong, but in the non-inverting mixer/summer 
configuration, I thought it wasn't possible to get an output gain less 
than 1, which you would need to get ±5V down to 0-5V using a single 
opamp ? .....


cheers,
Dave

On May 20, 2009, at 13:07, David Panseri wrote:

> Also if you want to save Op Amps you can use a non-inverting 
> configuration.
>
> -Dave
>
> On Tue, May 19, 2009 at 8:49 PM, Jason Proctor <jason at redfish.net> 
> wrote:
>> i did exactly this for my Arduino module. it bidirectionally 
>> interfaces a
>> +/-5v signal to the micro's 0-5v range.
>>
>> turned out to be pretty easy - on the way in, chop the signal in 
>> half, and
>> bias with +2.5v. then reinvert. on the way out, do the opposite. 1 
>> dual
>> opamp each way.
>>
>> lmk if you want the details.
>>
>> (i should also thank Tom Wiltshire here for his help getting me off 
>> the
>> ground with this stuff.)
>>
>>
>>> tonight i was looking at my scope
>>>
>>> Checking the input into a circuit that was only able to take 0-5 
>>> volts
>>>
>>> Sure enough, the signal was between 0 and 5 but the sawtooth was 
>>> clipped.
>>>
>>> So i am looking for a input block that can take either
>>> 5vp to p or 10v p to p (or any synth signal)
>>> and spit it out as a 0-5 signal without squaring the top.
>>>
>>>
>>> anyone know of a good circuit for this?
>>>
>>> thanks
>>>
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