Categories

Posts Tagged ‘longwave’

Low power longwave transmitter experiment

Tuesday, March 31st, 2015

Sverre Holm writes: There are several low power transmitters around that can be purchased, but most of them only cover the mediumwave band and not longwave (153-279 kHz). Further they are quite complicated as the frequency necessarily has to be user settable. I looked for a simpler way to make...

Tags: ,
Posted in DIY, hacks | 1 Comment »

Recent Comments

  • KH: So Romanians use old ICs too, a bit reminiscent of Dilshan's projects. I'm vaguely disappointed by the liberal use of float data and float calculations....
  • Max: This is of course no "0-30V" supply - the single-supply standard LM723 schematic can't go all the way down to zero, which is why I...
  • KH: A power-off current draw of 4mA for the Sony A6000 is a defect, product recall territory. It hits the camera battery with unacceptable wear and...
  • Olav Storstrøm: Please add 9-pin D-sub RJ45 and RJ12 connectors! Thanks!
  • KH: Hydroponics is like home automation. Every year you have folks who start projects like these and think it will take off and become a big...