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op amp

  1. J

    Changing flashing LED on module to stay on - use a capacitor? Any help please?

    I'm coming from a programming background and although I'm doing more electronics recently I'm still very much learning. I'm using a bluetooth module (this one https://www.amazon.es/gp/product/B073B1MZQF/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1) It has an LED function but it's really...
  2. ElectronicTy

    LM 741 Questions

    Hi all i have a problem with a LM741 op-amp, when calculating the output voltage i should have when inputting 12vpp using the formula Vo = Vi(1+Rf/Ri) and the values being vi = 12 rf = 6k Ri = 1.5k i should be having an output of 60v, but when building and simulating my design i only have...
  3. S

    Driving mosfet with opamp

    Hi, Recently I watched an old EEVBlog episode (#102) where Dave discusses and builds a basic constant current load. To try it out, I quickly built the circuit on a breadboard and got curious to fully understand how it works. For the op-amp I used the LM2904 and for the mosfet a STP60NF06, then...
  4. P

    Paired Op Amp Input Offset Correction

    Each of the op amps shown in the attached circuit diagram is powered from differing rails (+, gnd and gnd, -) to produce two identical, but DC shifted, outputs. In addition, the input signal is referenced to the negative rail instead of ground. There is a reason for this relating to balanced...
  5. S

    Aviation headset test amp

    Hi I have occasion to work on aviation headsets occasionally and rather than buy an aircraft intercom to just use on the workbench, I am thinking there might be an easy solution with parts on my bench. The mics are called amplified electret. Spec sheet of a typical set is here...
  6. Tapajit Mondal

    Arbitary waveform generator using a micro-controller

    Hello dear friends, The following image is that of a Data signal, one waveform is used to represent logic level 1 and other 180 degree phase shifted waveform represents logic 0. Can someone please provide some input on how I may be able to generate the following waveforms on a micro-controller...
  7. K

    Help needed with a component recomendation

    Hello all, I'm looking for a component recommendation for a unity gain analog inverter. I have available a regulated 5v DC supply and a stable ground supplying various sensors whose outputs serve a sealed black box computer. The computer generates various control signals up to 12 volts DC, it's...

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