| Herwe use a green glowing valve as a CPU activity meter. Power and control are both provided by the USB port. A simpler variant on the circu...
Martin Ossmann (82)
| Varactor diodes (Varicaps) along with many other exotic components which are often specifi ed in HF and RF designs are sometimes diffi cult...
| Wireless power transmission is already used in many applications, including electric toothbrushes, RFID tags and ‘refuelling’ electric cars....
| The very simple transmitter described here will let you test RDS equipped receivers and investigate faults, and could be used as the basis f...
| How should we go about building a circuit so that it is safe to use? To find out, we have taken a look inside a couple of items of equipment...
| The switch-mode power supply chosen by the author for this article is built without the use of special-purpose ICs and so can be completely...
| Adding automatic gain control (AGC) to the Elektor Electronics DRM Receiver (March 2004) is a useful undertaking. The original receiver was...
| The TIRIS family of RFIDs from Texas Instruments can be found in many consumer applications ranging from vehicle security to logging maratho...
| Valve circuits and radios in particular are graced by vast crowds of enthusiasts. If you want to keep your prize vintage radio as authentic...
| The circuit described in the April 2004 edition of Elektor Electronics certainly gave rise to a lot of head scratching and raised eyebrows w...