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83 projects
963
12
12
Another Operational Transconductance Amplifier - a humble attempt to provide a tolerant discrete design for a vital opamp type
Project Owner Contributor

AORTA

helgehelge

785
12
15
Open-Source, Environmentally Friendly Mouth Mouse with Sip/Puff Switch
Project Owner Contributor

IRAZU

olman-orozcoOlman Orozco

312
49
1
A modular mixer where it's easy to add more channel strips.
Project Owner Contributor

Modular Multichannel Stereo Audio Mixer

david-moreno-monteroDavid Moreno Montero

712
2
3
A cute little DIY ElectroMyography (EMG) sensor!
Project Owner Contributor

Muscle BioAmp BisCute

deepak-khatriDeepak Khatri

1.2k
4
3
Simple and easy way to build your own FSK modulator and demodulator!
Project Owner Contributor

FSK MODULATOR & DEMODULATOR

mit41301mit41301

5.3k
23
26
An "effect box" which works as octave-down effect (halves input frequency). No internal oscillator involved, no PLL, just analog maths!
Project Owner Contributor

Analog oscilator-less octave-down effect box

ms-bossMS-BOSS

2.1k
18
18
Adjustable voltage reference circuit with 0-9.99 V output. Output voltage is set with 3 digit pushwheel switch
Project Owner Contributor

Adjustable Voltage Reference with OPAMP 741

555techlab555Techlab

1.9k
23
21
A very useful test fixture to convert the voltage or impedance seen on its input to a variable frequency audible tone
Project Owner Contributor

Beeper Box: Analog V2F

john-guyJohn Guy

5.3k
36
34
An ultra-low noise amplifier (named EmoeNAP) capable to measure low-noise LDO/OPA's wide band output noise, and many other applications
Project Owner Contributor

Take a 'NAP' and enjoy a moment of silence

floydfishFloydfish

1.9k
9
15
Each line of the breadboard has an LED that glows based on the voltage on that line
Project Owner Contributor

Lightup breadboard

rasmusviil0rasmusviil0

186
2
2
Real world DC logic signal conversion to common microprocessor levels.
Project Owner Contributor

DC Input Protector - Level Shifter

dougDoug

12.9k
98
86
BioPotential amplification on your finger tip!
Project Owner Contributor

BioAmp EXG Pill v1.0b

deepak-khatriDeepak Khatri

2.6k
17
19
Plugging modules in modified prototype boards allows an affordable and flexible analog computer system with unusual features
Project Owner Contributor

Flexible Analog Computer

rainer-glaschickRainer Glaschick

3.7k
33
39
LED array that lights up in response to motion and sends waves across the array.
Project Owner Contributor

interactive analog LED wave array

chrisChris

1.6k
1.6k
15
Circuit sculpture: a table-top satellite model that shines and measures light (and is environmentally friendly).
Project Owner Contributor

A little CSK satellite for a bright workstation

andrea-consoleAndrea Console

300
1
1
Ski Lift Status Map with LED Indication for Current Lift Operational Status White or Black PCB + Wood, Wifi connected & OTA Updates
Project Owner Contributor

Trail Map Live Lift Status Ski Map - Mammoth CA

kevin-briceKevin Brice

322
2
2
A custom Feather with SAM L21 microcontroller, paired with wings that let us interactively explore its integrated op amp peripheral.
Project Owner Contributor

Feather Op Amp Lab

joey-castillojoey castillo

832
3
4
A linear CC-CV charger to handle various secondary lithium chemistries. Built with Op Amps and Comparators.
Project Owner Contributor

Op Amp Based Lithium Charger

roflhoffROFLhoff

11
10
Two gene-protein interaction models were modeled using the saturating behavior of opamps to model the sigmoid concentration/rate curves.
Project Owner Contributor

Model nonlinear biochem reactions using opamps.

bruce-landBruce Land

758
1
2
BioPotential amplification on your finger tip!
Project Owner Contributor

BioAmp EXG Pill v1.0

deepak-khatriDeepak Khatri

172
2
2
Balanced Ternary Analog-to-Digital Converter (ADC)
Project Owner Contributor

Ternary ADC

shaosSHAOS

1.2k
4
6
Home made thermocouple and an analog cold junction compensator which gives output voltage directly proportional to temperature in °C
Project Owner Contributor

Thermocouple Amplifier

rudraksha-vegadRudraksha Vegad

904
288
6
Sentry is an ESP32 wifi camera specially designed for local AI mode, its firmware is completely open source
Project Owner Contributor

Open source ESP32-Camera for Yolov4/5/6

fiberpunkFiberpunk

995
2
7
A circuit sculpture to participate in the 2023 op amp challenge.
Project Owner Contributor

Chaotic Lighthouse

mabe42MaBe42

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