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Build Your Own ECG-EKG Unit
For parts costing less than $50, I built an ECG-EKG unit that plugs into my laptop computer’s microphone input jack.
Build a Sump-Fill Level Controller
Need to monitor the high or low level of a fluid? Choose from these two versions of a sump/fill level monitor/controller.
Low Cost PC Two-Channel Oscilloscope
Build an easily portable and cost-effective two-channel oscilloscope that hooks up to a PC.
Universal Oscillator Topologies and Applications
Using the proper circuit topology for your particular application is paramount!
Wirespondence, Serial Bluetooth with a Micro, Analog Front End, AM/FM Receiver Restoration
Analog Waves from Digital Signals, DIY Electric Scooter, The Solar Alternative, Driving LEDs with a Microcontroller
Selected questions from past Q&A columns.
Need to brush up on your electronics principles? These multi-part series may be just what you need!