Just over six inches tall, this portable calculator certainly surpassed the all-transistor calculator released just a year earlier -- that calculator weighed 55 pounds and cost $2,500.

4 a.m. 8:15 p.m. 6:45 p.m. 4:15 a.m. 8:30 p.m. 7 ... If you aim for 7 to 9 hours of sleep each night, a sleep calculator like the one above can help you figure out what time to go to bed based ...

Pneumatic tools powered by a portable air compressor can save lots ... duty spray painting The California Air Tools 8010 is an 8-gallon horizontal compressor that can go anywhere it’s needed.

Use our investment calculator to calculate how much your money may grow and return over time when invested in stocks, mutual funds or other investments. Many or all of the products featured here ...

Coupled with a portable power station, some of the more powerful panels in our list can be used to keep garden sheds, polytunnels or off-grid campsites thrumming with a limited supply of free ...

Besides a 555 IC for the dwell and RPM measurement and a couple of CMOS gate chips, the rest of the board is populated by a smattering of passives and a big, 40 pin DIP IC under the 3½ digit LCD ...

But they do provide a much more generous and inviting screen than a smartphone. The Amazon Fire HD 8 Plus is an 8-inch tablet ...

These sometimes can be found on really old alarm clocks, but [Markus] was a lucky-duck and managed to acquire this large 8-digit display which previously made its home in a railroad station.