step up voltage converter / booster

[simonfraser]

i have a 0-3 V signal
needs to be 0.5 to 5.0 V, amps miniscule

with a slight amount of V adjustment.

various stuff on ebay, but that does not seem to work below 2V ?
e.g.
https://www.ebay.co.uk/itm/XL6009-D...208676?hash=item5d5502d9a4:g:ADoAAMXQstJTlgtv

 

[halcyon]

i have a 0-3 V signal
needs to be 0.5 to 5.0 V, amps miniscule

with a slight amount of V adjustment.

various stuff on ebay, but that does not seem to work below 2V ?
e.g.
https://www.ebay.co.uk/itm/XL6009-D...208676?hash=item5d5502d9a4:g:ADoAAMXQstJTlgtv

Take 5 volt regulated supply, connect to one end of a variable resister, zero line (neg) to other end of resistor, then feed supply from wiper to load. Wiper to earth will give 5 v - 0v if load is very low.

Brian

 

[pvb]

Take 5 volt regulated supply, connect to one end of a variable resister, zero line (neg) to other end of resistor, then feed supply from wiper to load. Wiper to earth will give 5 v - 0v if load is very low.

If you read the post again, you'll see that the OP has a 0-3v signal which he wants to amplify to give a 0.5-5.0v output.

 

[elton]

i have a 0-3 V signal
needs to be 0.5 to 5.0 V, amps miniscule

with a slight amount of V adjustment.

various stuff on ebay, but that does not seem to work below 2V ?
e.g.
https://www.ebay.co.uk/itm/XL6009-D...208676?hash=item5d5502d9a4:g:ADoAAMXQstJTlgtv

Use an op-amp, that's what they're for.

https://en.wikipedia.org/wiki/Operational_amplifier

 

[Lon nan Gruagach]

i have a 0-3 V signal
needs to be 0.5 to 5.0 V, amps miniscule

with a slight amount of V adjustment.

various stuff on ebay, but that does not seem to work below 2V ?
e.g.
https://www.ebay.co.uk/itm/XL6009-D...208676?hash=item5d5502d9a4:g:ADoAAMXQstJTlgtv

Those are dc->dc power supplies, unsuitable for signals that change at more than 1/10ths of Hertz

If you read the post again, you'll see that the OP has a 0-3v signal which he wants to amplify to give a 0.5-5.0v output.

^wot e said.

What you need is a 5V (or a bit more power supply) and a signal level converter...
could use a single transistor IF the drive circuit (source) has the right characteristics
OR
a single (or more to clean the signal) TTL gates (all in 1 chip) to do the job.

My choice would be option 2, using a 7404 hex inverter... use all 6 stages (waste not want not)

 

[halcyon]

If you read the post again, you'll see that the OP has a 0-3v signal which he wants to amplify to give a 0.5-5.0v output.

As I said take a 5 volt regulated power supply, that's what the OP had in Ebay, you can use a 8v step up and a 5v regulated supply, if 0.5v is needed a diode inline will be close.

Brian

 

[whiteoaks7]

Um... transistor?

Sorry - I assumed you had a 5V source. If you do then either a transistor voltage follower or, as someone else said, an op-amp. Either will give high impedance inputs.

 

[GHA]

Arduino would do it if you don't mind pwm. 0 - 3v input mapped to 0-5v output. Still need some 5v power from somewhere.
What's it for?