Category Archives: temperature sensor

Two-Cent Temperature Sensors

When they need to add temperature control to a project, many hackers reach for a K-type thermocouple for their high-temperature needs, or an integrated temperature-sensing IC when it doesn’t get that hot. The thermocouple relies on very small currents and extremely high gain, and you pretty much need a dedicated IC to read it, which can be expensive. The ICs aren’t as expensive, but they’re basically limited to boiling water. What do you do if you want to control a reflow oven?

There’s a cheaper way that spans a range between Antarctic winter and molten solder, and you’ve probably already …read more

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Posted in bandgap ADC, Bandgap Voltage Reference, diode, Engineering, Hackaday Columns, hardware, microcontroller, Original Art, temperature sensor | Leave a comment

Pocket-Sized Multiduino Does it All

How many times have you wished for a pocket-sized multimeter? How about a mini microcontroller-based testing rig? Have you ever dared to dream of a device that does both?

Multiduino turns an Arduino Nano into a Swiss Army knife of portable hacking. It can function as an analog multimeter to measure resistance, voltage drop, and continuity. It can also produce PWM signals, read from sensors, do basic calculator functions, and display the health of its rechargeable battery pack.

Stick a 10kΩ pot in the left-side header and you can play a space shooter game, or make line drawings by twisting …read more

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Posted in analog multimeter, Arduino Hacks, arduino nano, continuity tester, pwm, rtc, temperature sensor | Leave a comment

IoT Device Pulls Its Weight in Home Brewing

Brewing beer or making wine at home isn’t complicated but it does require an attention to detail and a willingness to measure and sanitize things multiple times, particularly when tracking the progress of fermentation. This job has gotten easier thanks to the iSpindel project; an ESP8266 based IoT device intended as a DIY alternative to a costly commercial solution.

Tracking fermentation normally involves a simple yet critical piece of equipment called a hydrometer (shown left), which measures the specific gravity or relative density of a liquid. A hydrometer is used by winemakers and brewers to determine how much sugar remains …read more

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Posted in beer, beer brewing, Beer Hacks, brewing, ESP8266, fermentation, homebrew, hydrometer, IoT, misc hacks, temperature sensor, wine, winemaking | Leave a comment