Author Topic: Op-amp basic circuit help  (Read 1526 times)

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Offline GazmonTopic starter

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Op-amp basic circuit help
« on: March 05, 2019, 08:07:14 pm »
Hi all,

I’m just getting into electronics properly, I would like to build some op-amp circuits to get me going again, could anyone direct me to a site or info that gives basic to intermediate circuits I can build please practically on a bread board and then test with an oscilloscope


Many thanks

Gazmon
« Last Edit: March 05, 2019, 08:17:17 pm by Gazmon »
 

Online rstofer

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Re: Op-amp basic circuit help
« Reply #1 on: March 05, 2019, 08:27:09 pm »
If you haven't already seen them, here are some good videos:











Google for 'eevblog op amp' and 'w2aew op amp' for more...
 

Offline dave3533

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Re: Op-amp basic circuit help
« Reply #2 on: March 06, 2019, 02:31:50 am »
Another recommendation is to look at whitepapers from some of the big name semiconductor manufacturers. Texas Instruments has some great whitepapers on op amps (first Google result: HANDBOOK OF OPERATIONAL AMPLIFIER APPLICATIONS).
 

Offline Audioguru

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Re: Op-amp basic circuit help
« Reply #3 on: March 06, 2019, 02:51:00 am »
An opamp circuit built with a tangled mess of wires all over the place on a solderless breadboard will probably pickup interference by the wires and the capacitance between all the intermittent rows of contacts will cause oscillation.
 

Online rstofer

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Re: Op-amp basic circuit help
« Reply #4 on: March 06, 2019, 04:03:07 am »
There are many evaluation boards but they aren't always inexpensive.

Here is a board for a quad op amp in TSSOP package.  Look at all the external circuit capability.  You can solder in resistors and capacitors however you want.

It has the advantage of being less susceptible to noise.  It has the disadvantage of not using plugable connections.

Go to Mouser.com and search for:

EVAL-PRAOPAMP-4RUZ

None of the links I tried worked properly.
« Last Edit: March 07, 2019, 12:27:08 am by rstofer »
 

Offline jonroger

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Re: Op-amp basic circuit help
« Reply #5 on: March 06, 2019, 05:48:13 pm »
I also recommend that you learn to use LTspice.    You can try things quite quickly.
I am available for custom hardware/firmware development.
 

Offline Audioguru

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Re: Op-amp basic circuit help
« Reply #6 on: March 06, 2019, 08:02:38 pm »
There are many evaluation boards but they aren't always inexpensive.

Here is a board for a quad op amp in TSSOP package.  Look at all the external circuit capability.  You can solder in resistors and capacitors however you want.

It has the advantage of being less susceptible to noise.  It has the disadvantage of not using plugable connections.


Your Mouser link goes to a page listing 4.4 million components.
 

Offline Zenith

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Re: Op-amp basic circuit help
« Reply #7 on: March 06, 2019, 08:32:41 pm »
Try this little book. Out of print but you can get them for £2 or so.

https://www.amazon.co.uk/How-Use-Operational-Amplifiers-BP/dp/0859340635/ref=la_B0034Q5A5C_1_1?s=books&ie=UTF8&qid=1551902581&sr=1-1

Basic amplifier configurations, oscillators, filters. Most of it's based on the 741. It gives pretty good explanations and waveforms. He recommends stripboard but I think a lot could be done with a breadboard, especially if you stick to a 741.
 

Offline GazmonTopic starter

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Re: Op-amp basic circuit help
« Reply #8 on: March 06, 2019, 08:36:52 pm »
Some great information above thanks all 👍👍
 

Online rstofer

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Re: Op-amp basic circuit help
« Reply #9 on: March 07, 2019, 12:27:49 am »
There are many evaluation boards but they aren't always inexpensive.

Here is a board for a quad op amp in TSSOP package.  Look at all the external circuit capability.  You can solder in resistors and capacitors however you want.

It has the advantage of being less susceptible to noise.  It has the disadvantage of not using plugable connections.


Your Mouser link goes to a page listing 4.4 million components.

It does indeed!  I modified the post to suggest just searching Mouser for:

EVAL-PRAOPAMP-4RUZ
 


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