You’ll Flip Over This Coin Toss Circuit
Exclusive Online Article: It’s Friday night and you’re hungry, so you decide to go pick up some food. Maybe a pizza, or maybe some kungpao chicken. You love them both, but you must choose one or the other. Do you flip a coin? Sure! But now, you can do it electronically! Let’s build a coin toss circuit!
Wind Your Own Transformers and Build a DC-to-DC Converter
Use this board as a platform for your switch-mode projects and experiment with winding transformers.
Build A Switching Regulator
We’re all familiar with linear IC regulators, especially the three-pin TO-220 package types like the 7805 and the LM317. They’re inexpensive, and their low-noise andfast transient response make them ideal for many applications. Their one drawback is efficiency. For example, a 7805 regulator delivering one amp from an input of 12 volts will dissipate seven watts of heat while delivering five watts to the load. Plus, a large heatsink would be required to keep it cool enough to operate...
Use Surace-Mount Devices To Build An FM Transmitter
In this article, we will construct a low-power FM transmitter that can be received with a standard FM radio. Along the way, we will look at how varactor diodes work and how to use an inductor that's in the circuit board.
Temperature Gauge Project
We will build a temperature gauge for the range 0°C to 50°C using a thermistor in an analog circuit. Why use a thermistor? Two words: temperature transducers. Along the way, we will look at various ideas such as how to linearize a thermistor, the effect of thermistor self-heating, and zero and span adjust in a gauge...