Whether your phone's dialer is malfunctioning, you're dealing with an outdated pulse dialer, or you're connecting to an open line, this versatile tool comes to the rescue. Simply select the desired ...

[Rogal] wrote a cell phone application called ToneTool that generates audio tone sequences. It can be used to output DTMF and SelCall sequences which are used by telephone systems and ...

Abstract: A circuit is described which uses one oversampling frequency synthesizer in an interleaved mode to generate dual-tone multifrequency (DTMF) telephone dialing tones. The synthesizer is based ...

Whether simple or ‘uncrackable’, whether constructed from discrete logic or using a microcontroller — code locks have become something of a tradition in Elektor Electronics. This one, however, is ...