| This circuit provides an excellent opportunity to upgrade your Märklin model train system from ‘traditional AC’ to digital control.Beginning...
| This circuit provides an excellent opportunity to upgrade your Märklin model train system from ‘traditional AC’ to digital control.Beginning...
| In the December 1999 issue, we published a design for a digital extension for the Sound Blaster Live! Value Player (circuit board #990079-1)...
| This circuit restores the original modulation of the signal received from the remote-control unit, which was demodulated by the receiver uni...
| There are various types of remote-control extenders. Many of them use an electrical or electromagnetic link to carry the signal from one roo...
| On conventionally controlled model railways, it is standard practice to stop a train at a signal by removing power from a section of the tra...
| Nowadays you can buy white LEDs, which emit quite a bit of light. They are so bright that you shouldn’t look directly at them. They are stil...
| This project is a card with eight optically isolated TTL-compatible inputs for external connection to the serial port, which communicates th...
| This circuit can replace small mains adapters in the vicinity of the computer. This is particularly handy for devices that need a 12-V suppl...
| There are many more types of single opamps available than dual or quad versions. Not only can it sometimes be interesting to replace a dual...
| The fan controller circuit for the Titan 2000 and other AF heavy-duty power amplifiers, published in the May 1999 issue, has an output that...