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Monitor your indoor air quality with an inexpensive CO2 sensor. We look at three candidates to help you find the best solution. ... Three inexpensive CO2 sensors compared ... inexpensive solutions: the Winsen MH-Z19C [1], the ScioSense ENS160 [2], and the Sensirion SCD40 [3]. The latter sensor from brand manufacturers such as Adafruit, Pimoroni, or SparkFun are really expensive

Want to communicate without relying on mobile networks? Meshtastic lets you create your own off-the-grid wireless mesh network with an inexpensive LoRa device and an Android phone.

that this was just client-server computing renamed) with the promise of inexpensive, very expandable computation and storage. Of course, none of this was completely linear in development. Many companies and groups

mechanical adding machines to do accurate business additions and subtractions. Enter the age of electronic calculators, which once were extremely expensive. Later, they became so inexpensive that they were

inexpensive components. Attaching an RPi to a VESA-equipped monitor could create a very powerful, low-cost thin client/media center for digital inclusion. It has no fan noise, uses very little electricity (3W

, the Raise 2 has neither an inexpensive tenting method, nor, like the ZSA Moonlander, a variety of differently priced tenting features. In fact, no tenting is included at all in the basic price. And perhaps

,000. I negotiated a deal with Ingres that reduced the charge for the database engine to $840 on a server and $10 on a workstation. It was so inexpensive that DEC did not raise the price of the Ultrix

variant often has KY-012 in its name. Because the parts are inexpensive, it's a good idea to grab a handful of them. A single buzzer is fine for simple tone sequences, but it's more fun if you have

for the scripts. Conclusions The Raspberry Pi AI Kit is relatively inexpensive and impresses with very low power consumption compared to a graphics card. The boards are only intended for inference (i

so as to control the motors in a meaningful way. At this point, note that the joystick is not very precise and does not fully utilize the full lever travel, but at least it is inexpensive. Finally