We haven’t yet experienced this first-hand, but it seems to occur more often than when some websites are visited they switch the Internet connection over to a premium rate dial-up number. Th... Read more
Electrical appliances accidentally left on in (holiday) homes left unoccupied for a short or a long period consume power unnecessarily and can present a fire hazard. Everyone will be familia... Read more
One of the most frequent uses of n-channel MOSFET’s is as a voltage controlled switch. To ensure that the MOSFET delivers the full supply voltage to the load it is necessary for the gate vol... Read more
A simple pressure switch with a range of 50 to 350 bar can be made using a pressure sensor. If you can accept somewhat reduced linearity, the sensor can even be used up to 500 bar. As shown... Read more
To derive a 5 V line from, say, a 15-25 V supply, National Semiconductor’s LM1575 or LM2575 is ideal. These switched 5-V regulators need only a choke, a freewheeling diode and a couple... Read more
Why we need Solar Panel Switch: When a battery is charged by a solar panel during the day, it may become (partly) discharged via that panel after sunset. This may, of course, be prevented by... Read more
