| ??? 10/03/09 15:12 Read: times |
#169384 - Sonitrol Responding to: ???'s previous message |
Hi Richard,
Once upon a time I worked for a security company named Sonitrol of Calcasieu, providing an alarm system that used microphones monitored by live operators to detect burglaries. In the pre-digital days of analog control panels, the main boards were attached via an edge connector. All of us carried pencils for just that purpose, to clean the edge contacts on the board. In that case, long before the contact became intermitant, oxidation would manifest as a high pitched squeal in the audio signal. Joe |
| Topic | Author | Date |
| how to stack 3+ boards | 01/01/70 00:00 | |
| Plan well | 01/01/70 00:00 | |
| clever idea N1 | 01/01/70 00:00 | |
| Take a look at www.samtec.com | 01/01/70 00:00 | |
| Key phrase: "board-to-board" | 01/01/70 00:00 | |
| Indeed! Any connector-maker should have them | 01/01/70 00:00 | |
| A possible alternative | 01/01/70 00:00 | |
| Don't | 01/01/70 00:00 | |
| thanks to all, | 01/01/70 00:00 | |
| there is a standard, the name eludes me, | 01/01/70 00:00 | |
| PC/104 | 01/01/70 00:00 | |
| PC104 - "stack-through" | 01/01/70 00:00 | |
| with pin headers and connectors | 01/01/70 00:00 | |
| Backplane bus system | 01/01/70 00:00 | |
| With backpane | 01/01/70 00:00 | |
| connectors | 01/01/70 00:00 | |
| I remember those days ... | 01/01/70 00:00 | |
| Sonitrol | 01/01/70 00:00 | |
the olden days | 01/01/70 00:00 |