DA Systems

As a design engineer, Stephen designed both hardware and software, writing micro-controller assembler, for the consumer electronic products manufacturer by this major security company. He was responsible for the redevelopment of the DRX system alarm monitoring equipment in line with fault-tolerant principles, various software test-rigs, and the new development of several digital communicators – both in hardware and software – working to the exacting communication standards enforced by BT. This work involved creating a multi-drop printer interface so that any number of DRX racks could log calls on a common single printer. He also wrote many compilers and de-compilers for various micro-controllers.

He also had exposure to working on a technical sub-committee of SATA (Social Alarm Trading Association), delivering a security protocol that was appropriate for all vendors and eventual adoption as a standard by BSI.

He was also engaged in analysing competitor products, as well as re-design of the Home-Care alarm systems with integrated test and status features.

He created a PC based digital communicator programmer system, through Visual Basic and dBASE, for settings through an EPROM programmer.