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

[Dan Snazelle]

one of the things i am debating is whether or not i should have a separate input for 0-5volt signals.

trying to get the offset and gain all within the 0-5 range seems to be quite hard UNLESS i have a control for offset and a control for gain ON the PANEL.

this seems like overkill (not to mention a calibration nightmare if i change inputs a lot) so maybe i could have one input (or a switch) for 0-5 and one for +/-5volts and maybe even one for +/-10volts

using ray wilsons calculator i cant find a fixed result that works for all three.

thanks





> On Tue, May 19, 2009 at 8:49 PM, Jason Proctor  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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