Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

redcharly — Wed, 23 Mar 2022 19:26:26 GMT

One thing I have been wanting to do for a long time is to make a number of simple circuits that use opamps and that can be used when we talk about modulations at school. Eg:

a high frequency oscillator (even 1 MHz would be enough) to generate the carrier signal,
an AM modulator;
an FM modulator;
an ASK modulator;
an FSK modulator;
a PWM modulator.

Having these simple circuits would be great for getting a better understanding of the concept of modulation.

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

manojroy123 — Mon, 21 Mar 2022 11:20:57 GMT

I am even looking for MCP6007-E/MS and MCP6292-E/MS as well for building comb generator. I have comb generator as a requirement for my future projects

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

manojroy123 — Mon, 21 Mar 2022 11:02:38 GMT

I want to build a comb generator using ISL28291FBZ and test it for various types amplifier , attenuater and filter

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

dougw — Sun, 20 Mar 2022 02:15:33 GMT

I have an op-amp project in the works, actually it has been in the works for years, but it still isn't good enough for me.

I have been designing electronic drum pads using piezo sensors. I have built several iterations of drum pad, signal conditioning circuit and software, but every time I make a system, I decide it needs to be better. Every time I sit down to design the next generation, I come up with a bunch of new ideas. Then I start collecting parts to build, then I sit down to do a more detailed design and often decide to completely change the design. I have built a few designs even though I have this never ending redesign cycle going on. One of the tricky areas for me is to capture the amplitude of the drum strike with low latency. I don't want a noticeable delay from when I strike to when the note gets played. Op-amps are used to condition the signal - get the amplitude to something appropriate for an A/D, do a sample-and-hold, and trigger an A/D sample. I have all the piezo sensors and a bunch of other stuff and it will eventually become a MIDI drum set.

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

alrms — Sun, 13 Mar 2022 17:11:55 GMT

I want to create a version of LED Dominoes using the op amps above that were originally made using 555 timers: https://hackaday.io/project/180187-ledominoux. I think this would be a fun Op-Amp version of LED dominoes.

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

me_Cris — Fri, 04 Mar 2022 21:21:30 GMT

A useful circuit with OP Amp UA741 is an electronic thermostat with thermistor, with applications in: air conditioning, central heating, coolers, laboratory, greenhouses, aquariums, ventilation and so on, and uses a NTC thermistor of 100kOhm value at 25 degrees Celsius (with coefficient negative temperature) as a temperature transducer. Characteristics: Temperature control: -45 + 145 ° C Power supply: 12V / 200mA

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

martinlong1978 — Thu, 03 Mar 2022 13:17:30 GMT

My project idea is to build a basic modular bench multimeter / scope. The analogue side based on op amps, including a current sense amplifier, and various op amps to control the signal amplification. Digital side using something like a ESP32, with a small TFT screen. It would also allow a phone/tablet/laptop to be connected via wifi/bluetooth, for better display of scope functions.

Additional modules include:
- milliamp clamp meter
- remote monitoring/logging e.g. for IoT devices. Measure power consumption in line and logging to MQTT
- signal generator
- data loggers for temperature, light, current, voltage, humidity, etc

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

vinayyn — Wed, 02 Mar 2022 11:49:25 GMT

My project idea is to create an affordable Spectrophotometer for chemical analysis.

Spectrophotometer for chemical analysis cost is more, to make it in affordable price I have planned long back ago, due to the shortage in the components I paused the project when I see the amplifier ic which I need for my project is available in the kit.

Block Diagram of the project

Brief Explanation of the Project

Chemical samples are analyzed through the photodiode and light source, The photodiode data is fed to the amplifier circuit to amplify the signal and filter it. after the amplification the analog signal is sent to the analog to digital converter, the converted data is then interfaced with a microcontroller. the microcontroller collects all the data and processes the results and then transfers the data to the computer over the USB.

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

asokfair — Fri, 25 Feb 2022 15:03:35 GMT

My Concept is named "Magnetic Current Amplifier" The amplifier is designed and sensitive to the magnetic field effect. By variation in current the amplifier gain or output is adjusted accordingly. But what is the use of it? lets wait for the blog.

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

scottiebabe — Thu, 24 Feb 2022 22:50:14 GMT

I would like to build an inline audio power meter / impedance analyzer. There are numerous amplifiers listed in the kit that could be used for the current/voltage signal conditioning. That dual channel signal generator would be pretty handy to have as well [emoticon:c4563cd7d5574777a71c318021cbbcc8]. With my new inline power meter I can avoid blowing out my woofers again :) ... lol

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

robogary — Thu, 24 Feb 2022 22:18:57 GMT

Its unclear whether I'll have time to build and test an op amp entry, but if I do, this is what it will look like.

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

genebren — Thu, 24 Feb 2022 18:52:55 GMT

My plan for this contest is to build a high-end Midi interface/player to my KORG volca modular synthesizer (see it in action here :/members-area/personalblogs/b/gene-breniman-s-blog/posts/having-fun-with-a-korg-volca-modular-synthesizer). The plan is to build a Midi player interface that can not only provide Pitch and trigger CV (control voltages), but to also generate analog signals (CVs) that can be patched into each of the knob override pins so I can control almost all of the features of this instrument from encoded files. I also plan to add some noise sources to the instrument with selectable/programmable noise sources (white, pink and brown) to add even more fuzz/funk to sounds. I have always loved the beauty of electronic synthesizers (since back in the early 70's), but I have never been much of a musician. For me, by only hope of hearing what this instrument is capable, is being able to drive it programmatically through (modified Midi). Although there is a lot of digital aspects to this design, the heart of most the design will be analog. I will be using Op-Amps to provide voltage buffering, multiple 7 pole filters (3dB/Octave), programmable attenuators and A Salen-Key low pass filter.

Let the fun begin!

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

swalberg — Thu, 24 Feb 2022 13:08:42 GMT

My ham club has a maker's group that builds radios from scratch. They're just starting a direct conversion receiver project, so I'm looking to build this project and pair it with a transmitter. There are several op amps used here since the signal goes through multiple stages in both the transmit and receive directions.

Sean KN4ZMA

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

fyaocn — Thu, 24 Feb 2022 02:51:39 GMT

Have bought one MAX30003C AFE for design of heart rate detection and electrocardiogram long ago, try to do something around the idea again. Would this parts be qualified as Op-Amp. Or I buy discrete Op-Amp from ADI or Maxim to rebuild the circuits.

RE: Project14 | Op-Amp-a-Palooza: Win an Op-Amp Kit for Your Op-Amp Project!

fmilburn — Thu, 24 Feb 2022 02:49:14 GMT

I am building an all-analog controller to test hobby servos based on a clever design by w2aew. The PCBs have already been designed and ordered.

The base controller requires op-amps with rail to rail output and if selected for the kit I plan to use the MCP6042-I/P as the design is based on DIP-8 dual-channel amplifiers and meets the requirements. The user interface will be a potentiometer for input and an analog meter for displaying output pulse duration in milliseconds. Up to four servos can be controlled.