WV1800es

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WV1800es

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  • 07.31.2013
  • Overvoltage transients: The silent killer
  • I'm surprised no one has offered gas discharge devices for circuit protection. When we were doing data collection over the public telephone system in Florida a few years ago, those devices saved our bacon. They would bypass the surges, and work over and over. The MOV protectors we used had a major problem - they'd encounter one surge, then need replacement!
  • 05.08.2017
  • Understanding DRM: digital radio mondiale
  • Watch the kHz - MHz references in there- 'This kit converts the 455 kHz IF signal into the 12 MHz mixed-audio content signal.' Hard to get 12 Mhz by mixing 443 khz and 455 kHz.... Also in Figure 1, 100khz comes between 1 Mhz and 1 Ghz.
  • 03.07.2017
  • Measuring appliance power consumption
  • If you have an electric water heater, you can save a good bit of money by having a time switch installed. The internal clock will turn off the power to the water heater when you leave the house or are sleeping, and turn it back on an hour or so before you get home or get up. My sister and her husband are hard core savers, they only turn the water heater on when they're going to be taking a shower, etc.
  • 03.17.2017
  • Are streaming sticks the present and future?
  • Sticks are the way to go! We've got a FireStick, a Roku. a stick PC, and a Google Chrome plugged into a 4 port video switcher. Power them all up with a multi-port USB power supply, and got rid of the wall warts, etc. Now the old TV works as a smarter TV with a PC, and we take advantage of the best deal when it's time to renew programming.
  • 03.20.2017
  • Teardown: Fitness band hardware
  • Your eyes are pretty good, 3.7V 30mAH looks right. The nRF 8001 Bluetooth chip is on the left in my photo tho. Thanks for the great writeup!
  • 03.20.2017
  • Teardown: Fitness band hardware
  • I dunno, Brian, I never had any luck with those tools with a 'slot' on the end of them. Seem to get more torque transmitted with the old 'flathead' type!
  • 01.31.2017
  • Adrift on the meandering path of product development: DC-probe case study
  • Hi Tom, GREAT tale of the product development! Congratulations on bringing it into production. For your sloppy pot knobs, take a tip from the old guitar amp manufacturers, and put a circle of felt between the knob and the panel. It'll tighten 'em right up, and keeps them from 'creeping'.