XL741 – Discrete Op-Amp

7:43 pm Uncategorized

We’ve done it again! My friends at Evil Mad Scientist Laboratories have a new kit for sale. Following on the success of our Three Fives discrete 555 timer kit, we’ve had a lot of requests for a discrete 741 op-amp.

The XL741 is based on the datasheet schematic of the original uA741 op-amp IC from 1968. You can wire it up in a classic op-amp circuit and probe nodes inside the IC so you can see how the chip works. Play with differential pairs, modify the compensation, and change bias currents to your heart’s content!

5 Responses
  1. Richard :

    Date: August 13, 2014 @ 10:15 am

    I’ve ordered your three fives and XL741 kits sir. I look forward to massive enjoyment and amazement. Or else! Have I mentioned how much you rock? Rich the smarty pants.

  2. eric :

    Date: August 13, 2014 @ 6:11 pm

    Thanks! Hope you enjoy building them.

  3. Friedrich Birk :

    Date: September 27, 2014 @ 9:32 am

    Dear Sir, your project with µA741 is a great and wonderful idea. My question to you: It is possible to get the layout (pdf) from this pcb?

    Your sincillery

    Friedrich Birk

  4. eric :

    Date: September 28, 2014 @ 5:13 pm

    Friedrich–the PCB layout is closed source (for now, but that could change in the future).

  5. Alex :

    Date: October 8, 2014 @ 1:51 pm

    What a great idea, I hope there are more kits similar to the 555 and 741.

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