| ??? 07/23/07 12:13 Read: times |
#142167 - Upside down... Responding to: ???'s previous message |
Jeff Post said:
... my SWAG is that autos switched to negative ground as electronics in cars became more common. Electronics engineers were accustomed to thinking of B+ as the source and the other terminal as "ground". Not necessarily: in the days of germanium transistors - which tended to be PNP - it was common to to think of the positive as "ground"... eg, http://www.8052.com/forum/read.phtml?id=70557 |
| Topic | Author | Date |
| another Weekend Way Off Topic | 01/01/70 00:00 | |
| Electrolytic effects - and further off-topic... | 01/01/70 00:00 | |
| I faintly recalled something about electrolysis... | 01/01/70 00:00 | |
| And whath about older cars "plus"-ground? | 01/01/70 00:00 | |
| maybe the same reason... | 01/01/70 00:00 | |
| Try an alternate form of the question. | 01/01/70 00:00 | |
| What's in a name? | 01/01/70 00:00 | |
| references | 01/01/70 00:00 | |
| Hanging ground straps | 01/01/70 00:00 | |
| Another possible use for hanging ground straps | 01/01/70 00:00 | |
| No contact while driving | 01/01/70 00:00 | |
| ECL chips use positive grounding | 01/01/70 00:00 | |
| Going way - way off - off topic | 01/01/70 00:00 | |
| Car tyres conduct | 01/01/70 00:00 | |
ground straps | 01/01/70 00:00 | |
| Upside down... | 01/01/70 00:00 | |
| after 2 hours googling | 01/01/70 00:00 | |
| It is for corrosion | 01/01/70 00:00 |