Need help with baby's first curve tracer

[cellularmitosis]

Here's a 555-based triangle wave + offset generator (which also compensates for the shunt voltage). Think I'll give this a shot.

 

[tomchr]

TI has 259 rail-to-rail opamps: https://www.ti.com/amplifier-circui...pose/products.html#p1261max=32;48&~p78=In;Out

Just saying... 😉

Another consideration: You may want to run all the opamps from the same power supply. That will limit the issues you have once your stack of 9 V batteries (which I'm assuming you're using) discharges. Currently the batteries will discharge at different rates, which could give you some rather 'interesting' behaviour.

Tom

 

[cellularmitosis]

Thanks Tom. In the 555 circuit, the batteries are no longer tapped in the middle.