Dev tools · alternatives · 2026
24 alternatives to SevenFortyFun, a transistor level op amp kit
SevenFortyFun, a transistor level op amp kit. Contribute to OpenAnalog/SevenFortyFun development by creating an account on GitHub.
SevenFortyFun is a transistor-level operational amplifier kit hosted on GitHub. It is designed for electronics enthusiasts and developers who want to understand how op amps work at the component level. The kit allows… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. SevenFortyFun, a transistor level op amp kit launched in 2014; newer entries below may have overtaken it.
- 1
Haxophone▲526I built this during Covid. When I released it, some of the parts went out of stock or skyrocketed in price, no longer making this an economic DIY project. Now that things are getting back to almost normal, I thought I'd share it here and request feedback. This is a very niche project for people who like the same things I do: saxophones, Rust, mechanical keyboards and the Raspberry Pi.
2022 · github.com · its alternatives →
- 2
Guitar plugin made with JUCE that uses neural networks to emulate a tube amplifier. - GuitarML/SmartGuitarAmp
2020 · github.com · its alternatives →
- 3IB
Originally started as a project to restore patterns from now defunct website 808.pixll.de just for myself, but eventually i decided to share it with others. I've seen this website mentioned a couple of times on HN:) Currently it only supports Roland TR-808, but there will be more.
2025 · drumpatterns.onether.com · its alternatives →
- 4
PJON (Padded Jittering Operative Network) is an experimental, arduino-compatible, multi-master, multi-media network protocol. - PJON/src/strategies/SoftwareBitBang at master · gioblu/PJON
2020 · github.com · its alternatives →
- 5
A Flipper Zero clone, but cheapest, DIY and simply Open Source, made with Arduino IDE - lraton/FlopperZiro
2025 · github.com · its alternatives →
- 6IM
Hi HN, I made some animations of the most important kinds of transistors using my semiconductor simulation, details of which are on the page. I tried to make the visuals as realistic as possible while also aiming for clarity. If you want to go beyond the charge carriers and look at, for example, the electric field, you can do so in the simulation software. The desktop software also has less common devices like IBGTs and SCRs that have similar animations. The last thread about my software was posted here about a year ago: https://news.ycombinator.com/item?id=43942279
Jul 2026 · brandonli.net · its alternatives →
- 7
Audio Kit▲96Open-source audio synthesis, processing & analysis platform.
2014 · audiokit.io · its alternatives →
- 8
A powerful realtime node-based audio synthesizer. Contribute to monadgroup/axiom development by creating an account on GitHub.
2018 · github.com · its alternatives →
- 9
2017 · kelu124.gitbooks.io · its alternatives →
- 10
Verilog2factorio▲313This project will compile verilog (a hardware description language) into factorio blueprints. - Redcrafter/verilog2factorio
2021 · github.com · its alternatives →
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- 12AP
I made MAIM, an open-source audio plugin that uses real MP3 encoders to distort the sound. I've also added knobs that let you "circuit bend" the encoders, changing parameters that would normally be inaccessible to the user to get strange glitchy sounds. The plugin lets you switch between two MP3 encoders, since under the MP3 standard, the specifics of what to lose in MP3 lossy compression is left up to the encoder. The encoders are LAME, the gold standard for open-source MP3 encoders, and BladeEnc, an old open-source MP3 encoder that has a really bubbly sound and was fun to work with. I'd…
2023 · wildergardenaudio.com · its alternatives →
- 13IB
We wanted to do something very challenging to prove to ourselves that we can do anything we put our mind to. The reasoning for why we chose to build a toy TPU specifically is fairly simple: - Building a chip for ML workloads seemed cool - There was no well-documented open source repo for an ML accelerator that performed both inference and training None of us have real professional experience in hardware design, which, in a way, made the TPU even more appealing since we weren't able to estimate exactly how difficult it would be. As we worked on the initial stages of this project, we…
2025 · tinytpu.com · its alternatives →
- 14
I built MCP servers for my oscilloscope and SPICE simulator so Claude Code can close the loop between simulation and real hardware.
Apr 2026 · lucasgerads.com · its alternatives →
- 15
Hi HN - My name is Andrew, and I'm a high school student. This is a write-up on StratoSpore, a payload I designed and launched to the stratosphere. The goal was to test if we could estimate physical altitude based on algae fluorescence (using a lightweight ML model trained on the sensor data). The blog post covers the full engineering mess/process, including: - The Hardware: Designing PCBs for the AS7263 spectral sensor and Pi Zero 2 W. -The biological altimeter: How I tried to correlate biological stress (fluorescence) with altitude. - The Communications: A custom lossy compression…
Nov 2025 · radi8.dev · its alternatives →
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Hello HN, not many will know what this tool is about, but it's launch day and I always dreamed of posting on HN. Let's start! This is a tool for people using eurorack gear. For synth people. What is cool about my tool is that I show the signal flow with a graph. Here's the official press text: After a decade of stagnation in this space we are excited to present patcher.xyz: the modern way to manage everything modular. It’s a tool for professionals, enthusiasts, and casual wigglers. Novadays artists must develop their own means of taking notes, often on paper, since there is no common format…
2022 · patcher.xyz · its alternatives →
- 17
Olmo Hybrid▲1077B open model mixing transformers and linear RNNs
Mar 2026 · allenai.org · its alternatives →
- 18
Portable MIDI guitars for music production & instruction.
2018 · indiegogo.com · its alternatives →
- 19
Contribute to andrewfader/blokkily development by creating an account on GitHub.
11d ago · github.com · its alternatives →
- 20
EP–133 K.O. II▲146The latest synth from Teenage Engineering
2023 · teenage.engineering · its alternatives →
- 21
Copper is an operating system for robots - build, run, and replay your entire robot deterministically. - Home · copper-project/copper-rs Wiki
2024 · github.com · its alternatives →
- 22KS
2015 · amid.fish · its alternatives →
- 23
A site for sharing electronics projects.
2018 · kitspace.org · its alternatives →
- 24
Deep learning models for guitar amp/pedal emulation using LSTM with Keras. - GuitarML/GuitarLSTM
2020 · github.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →