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| LM741 connections with signal generator |
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| iMo:
People in electronics communicate with help of schematics diagrams. Show us your schematics and describe how do you perform the measurement. |
| Gazmon:
--- Quote from: imo on March 31, 2019, 03:53:06 pm ---People in electronics communicate with help of schematics diagrams. Show us your schematics and describe how do you perform the measurement. --- End quote --- The schematic is posted in the first few posts !! |
| iMo:
Show us your schematics with the exact wiring and how is your generator and the oscilloscope wired. Do not expect the forum members will do for you. They will certainly try to help you, but you have to provide the exact inputs. |
| Gazmon:
Point taken sorry R1 is 2k R2 is 10k My input signal is 9v pos/neg, appreciate this is slightly low , but it’s a start Sigen connections are positive to pin 3 lm741 Sigen connection negative to pin 2 lm741 Appreciate the info request , and apologies Oscilloscope is connected ground and to the output pin of LM741 |
| rstofer:
--- Quote from: Gazmon on March 31, 2019, 03:12:33 pm ---Hi I have attached my scope reading as they appear with my sigen input, why is my amplitude not correct to my outputted sigen signal Just outputting a triangle waveform and cycling through the others I’m connected as an non inverting I think , positive sigen connected to the - --- End quote --- I'm pretty sure you want negative feedback and you absolutely don't want a differential input. You do not connect your generator between pins 2 and 3. Signal goes in on +, generator ground connects to scope ground and battery ground. Negative feedback like you posted in Reply 3. R1 as shown in Reply 3 also connects to that common ground point. Your gain is awfully high considering how little swing you can have with your limited voltages. For a first cut, I would drop the gain to 1 and see that I got the same voltage swing out as in. You would be building a non-inverting amplifier: https://www.electronics-notes.com/articles/analogue_circuits/operational-amplifier-op-amp/non-inverting-amplifier.php |
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