« previous next »
Pages: [1]   Go Down

Author Topic: Hi, is they any op amp with pin 4 as positive and ground as pin 7 ?  (Read 922 times)

0 Members and 1 Guest are viewing this topic.

Offline nyameTopic starter

  • Regular Contributor
  • *
  • Posts: 74
  • Country: cm
Hi, is they any op amp with pin 4 as positive and ground as pin 7 ?
« on: June 28, 2018, 03:55:16 pm »
Hi, please i wish to know if there is any op amp with pin 4 as positive and pin 7 as ground ?
Logged
 

Offline awallin

  • Frequent Contributor
  • **
  • Posts: 694
Re: Hi, is they any op amp with pin 4 as positive and ground as pin 7 ?
« Reply #1 on: June 28, 2018, 04:03:32 pm »
that looks like a typo in the instructions..
Logged
 

Offline wraper

  • Supporter
  • ****
  • Posts: 17581
  • Country: lv
Re: Hi, is they any op amp with pin 4 as positive and ground as pin 7 ?
« Reply #2 on: June 28, 2018, 04:25:19 pm »
Particular op amp is mentioned (741). And it's explicitly said to connect "+" of the battery to the "-" pin of the op amp, and the same nonsense for other power pin. Therefore what written is incorrect.
Logged
 

Offline Audioguru

  • Super Contributor
  • ***
  • Posts: 1507
  • Country: ca
Re: Hi, is they any op amp with pin 4 as positive and ground as pin 7 ?
« Reply #3 on: June 29, 2018, 12:01:27 am »
Many lousy old 741 opamps (designed 50 years ago to use a 30V supply) do not do anything with a 9V supply and a 9V battery quickly drops to below 6V.
Use a modern opamp that works with a 5V to 9V supply.
Logged
 
Pages: [1]   Go Up
« previous next »

Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf

 


EEVblog Main Site EEVblog on Youtube EEVblog on Twitter EEVblog on Facebook EEVblog on Odysee