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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Positive / Negative voltage circuit problem

You don't appear to have cut any of the tracks between the Op-amp pins!
When I read your solution, I smiled and said to my self, "spot on - who noticed that detail?". Then i checked who posted it and I was so happy to see some much needed diversity on this site. Sarah, thank you for joining and participating in the site. Cheers!
 

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