| ??? 08/22/12 22:20 Read: times |
#188125 - Go to the lowest practical voltage Responding to: ???'s previous message |
David Brown said:
... use while they are standing in a swimming pool.
... The unit will likely run on 24vDC, and the highest voltage internally would be for the displays' LED backlight, at ~30vDC. How large is this display ? Pure water may be non conductive, but pools are nowhere near pure. Standing in a pool is a LOT of wetted area, and the person may have medical conditions, so you need to avoid current paths. * Lower the voltage to the lowest practical - 3.3V or 5V displays are easily available Also avoid any moving seal, do you _really_ need a Pot, with a touch panel right next to it ? I know Spa pool suppliers make wide use of Air switches, driven by safety and reliability concerns. |
| Topic | Author | Date |
| Designing a product for use in water | 01/01/70 00:00 | |
| Have you considered silicone coating? | 01/01/70 00:00 | |
| one link | 01/01/70 00:00 | |
| Waterproof enclosures | 01/01/70 00:00 | |
| Projective touch - or maybe waterproof tablet | 01/01/70 00:00 | |
| If that potentiometer wasn't a hard requirement | 01/01/70 00:00 | |
| more details | 01/01/70 00:00 | |
| You might want to look into that a bit further | 01/01/70 00:00 | |
| buttons for up/down gives tactile feedback | 01/01/70 00:00 | |
| nevertheless, a strobe wheel rather than a pot ... | 01/01/70 00:00 | |
| more good ideas | 01/01/70 00:00 | |
| Go to the lowest practical voltage | 01/01/70 00:00 | |
| answers | 01/01/70 00:00 | |
| Electric shock and intrinsically safe | 01/01/70 00:00 | |
| Isolators | 01/01/70 00:00 | |
| a question and a reference | 01/01/70 00:00 | |
| answers | 01/01/70 00:00 | |
| tethered unit?? | 01/01/70 00:00 | |
| mounted display | 01/01/70 00:00 | |
| have you considered a combination of battery and solar? | 01/01/70 00:00 | |
| indoor pool | 01/01/70 00:00 | |
Wireless chargers | 01/01/70 00:00 |