LittleBill wrote:
eb145 wrote:
The little voltage boosters are designed for laptop power supplies that can plug into 12V cigar lighter outlets in cars. They are designed as constant voltage output (variable voltage). With no apparent limit to the current. They will burn out quickly if allowed to pass lots of current - thus the fan to cool them in the summertime. Max power is 150W per device.
Ed
Not really sure what you mean by there is no limit to current . right in the listing it says 6 amp. of course they have no limit but you better push some serious airflow if you expect them to last
" DC-DC 150W Boost Converter 6A 10-32V to 12-35V Step-Up Voltage Power Supply"
fan would do alot better also if you actually had it aimed over the heatsinks
This is closer to what I got - 16Amps input max, 10 Amps output max:
150W DC-DC boost step up converter"You can use it to power all your electronic devices, as long as the rated input voltage and rated input current is not exceeded."
I see they cost $11.99 now.
What I meant to say is that there seems to be no over-current protection for these little things. There is a limit on the specifications, but there seems to be no current-limiting control (other than letting the smoke out).
For the airflow I am going to cut out some plastic baffles to force all the air to flow over the voltage converters and their heatsinks. I don't know if you can tell by the pictures, but the air is drawn in by the fan, blows under the wood block and exits the other side. Plastic and duct tape baffles will force all air to exit where I want it to. When I did my initial testing on this, temperature was in the low 40s (F) so cooling wasn't so critical. In July, cooling will be a big deal.
Ed
