Split breadboard power supply module for 741 OPAMP?

Hi, I have one of these breadboard power supply modules that provide pins for 5v, 3.3v and ground:


I also have a UA741C Opamp which I want to test out, which requires a dual power supply (I know that the 741 is obsolete and there are single supply opamps out there that are preferable, however I want to use this one just for the sake of seeing it work as 90% of opamp circuit diagrams in my undergrad textbook reference this IC). I was wondering if it would be possible to split two 5V supply lines in the above module to produce a Vcc = +5V and a Vee = -5V line for the breadboard with a ground in between? Something like below:

If not, are there any cheap strategies for obtaining a dual power supply? Thanks!

EDIT: feel a little stupid asking this because if you think about it: it wouldn't make sense to get a 10 V output range from the 9 V DC battery that I was powering this module with. Also thanks for all the suggestions, I will be checking them all out to see what works best!

No - they are both connected to the same regulator.

1 Like

Use a -5V regulator, they do exist, for good reasons.

1 Like

Use a charge pump, quite a simple circuit of low power.

I guess that you'll have many problems with the 741 unless powered by the recommended ±15V.

1 Like

Yes, but the minimum is ±10V

1 Like

A repurposed PC power supply will have +/- 12V and more.

1 Like

TC7660 is an inexpensive converter that can supply an op-amp.

1 Like

Use 2 cell phone supplies.
They supply 5V.
Connect the - from one to the + from the other, connect this union to GND,
and between the + of the first and the union of the two will have +5V and between the - of the second and the union will have -5V,

1 Like

Yes but as pointed out you can't run a 741 off +/- 5V you need at least +/- 10V.

Ok, you are right.

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.