We have a Pager that works, but no pager service is available. People have moved on to phones.
Amateur radio receivers
- Incoming SMS
- Outgoing Landline
Professional Services in Analog and Digital Circuit Design, PC Board Layout, and Embedded Controller hardware/software.
Embedded Processor/Controller Design
New Product Design, Firmware Coding and Modification, System tradeoffs and improvements, C and assembly programming.
More … Electronic Design Tips – written by Tom Brannon.
Serial Status Input Circuit
When collecting status input data, a few points rapidly consume many connections requiring distribution panels, multiplex logic and expensive parallel IO devices. This simple serial circuit allows you to daisy chain status inputs up to 16 inputs using only four wires. I chose this circuit for a Subsea System due to the high cost of underwater cabling and connectors.