| ??? 01/17/06 13:37 Read: times |
#107587 - Stupid and dangerous!! Responding to: ???'s previous message |
This circuit with the shown components is illegal and highly dangerous! Think about what happens if fast voltage spikes, called bursts are recieving this circuit: The caps show a short cirucit and all the overvoltage sits at the rectifier...
Also, only X2-caps are allowed to be connected to mains. But no word about this in the link. The other advices given in this link, especially the advice to use an audio transformer (?!?!) to achieve isolation from mains, are also wrong, stupid and deadly dangerous!! But what is totally ridiculous is, that if you take a proper mains cap for the circuit, you will waste even more space than when using a tiny mains transfomer! Remember, the circuit only delivers 15mA, and there are very small mains transformers for such low currents available on the market. E.g: 270-1244 from RS components: 22mm x 23mm x 15mm. A real safe cap like 414-8544 from RS components will show 26mm x 24.5mm x 15.5mm on the other hand! So, you do not have any advantage from omitting the transformer. Only if you use unsuited components, but that is illegal and you will be put into prison if someone gets hurted or even killed... So, please put your hands off these shitty circuits, they are as stupid as the "designer" proposing them. Kai |
| Topic | Author | Date |
| DC power supply | 01/01/70 00:00 | |
| Danger! | 01/01/70 00:00 | |
| re:dc power | 01/01/70 00:00 | |
| what about using a wall-wart? | 01/01/70 00:00 | |
| Safety! | 01/01/70 00:00 | |
| OEM power supply modules | 01/01/70 00:00 | |
| the Op stated "I know but tranformer too | 01/01/70 00:00 | |
| Please, much more details | 01/01/70 00:00 | |
| re: | 01/01/70 00:00 | |
| No way | 01/01/70 00:00 | |
| 6 VA ? | 01/01/70 00:00 | |
| Better relay = lower current | 01/01/70 00:00 | |
| smps | 01/01/70 00:00 | |
| smps are fine if you can make them work | 01/01/70 00:00 | |
| Maybe we've missed something. | 01/01/70 00:00 | |
| probably because the OP stated "I know b | 01/01/70 00:00 | |
We still don't know the dimensions ... | 01/01/70 00:00 | |
| check this link | 01/01/70 00:00 | |
| check this thread | 01/01/70 00:00 | |
| check this link, how schocking | 01/01/70 00:00 | |
| Stupid and dangerous!! | 01/01/70 00:00 | |
| just to clarify | 01/01/70 00:00 | |
| unsuited versus suited | 01/01/70 00:00 | |
| we have a case hwre no guarantee is requ | 01/01/70 00:00 | |
| audio transformer??? | 01/01/70 00:00 | |
| got curious, here is the link | 01/01/70 00:00 |