Jamming on Lightwaves in this Weekend Project
Build an optical guitar using a common LM386 audio amp chip. Read more on MAKE The post Jamming on Lightwaves in this Weekend Project appeared first on Make:.
View ArticleIrrigating Your Garden With an Op Amp
Instructables user diy_bloke built this op-amp controlled pump for his garden, using the classic 741 operational amplifier. He wrote a very detailed how-to including showing how to etch a PCB, as well...
View ArticleUse an Op Amp to Make a Self-Dimming Night Light
On Make: Projects, Jason Poel Smith uses a pair of LM741 op amps to build an self-dimming night light that turns itself off after a period of time so you don’t waste electricity. The timer is made from...
View ArticleMake a Heartbeat Detector With an Op Amp
Scott Harden’s DIY electrocardiogram (ECG) uses a LED shining light through his finger into a photo transistor, with the resulting signal amplified with a LM324 quad op amp. The goal of this project is...
View ArticleVisualize Your Heartbeat With This Homemade Pulse Sensor
Infrared Pulse Sensor is the latest addition to our beginner-friendly series of Weekend Projects. Inspired by a photoresistor pulse sensor, MAKE's Technical Editor Sean Michael Ragan built this...
View ArticleProjects with Ryan Slaugh: Simple Amplifier
Building upon my last video, I’ve decided to make a simple circuit using some op-amps. One is the general op-amp LM741. The other is a specific op-amp, LM386, that is designed for audio...
View ArticleProjects with Ryan Slaugh: Active Filters & Tool Suggestions
Over the last few videos I have highlighted helpful circuits. In this video, I highlight an active filter setup utilizing an operational amplifier. Filters are very helpful when working with analog...
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