PDA

View Full Version : Better AC Adapter


Pacetech
08-04-04, 04:58 PM
Just FYI. In case anyone is looking for a nicer AC Power Supply.

I'm now using a 6V regulated adapter for my Isopod V2 and Isopod-X and it works great. The 5V regulator is much cooler. The 3.3V is still warm (still dropping 5V to 3.3V), but I found that I can draw another 100 mA off the 5V without resetting the board.

Before I was only able to draw 50mA off the +5V supply for my optical encoders, now I'm pulling 150mA with no problems.

Digikey PN T451-P5P-ND Its has 2.1mm plug, fits in the Isopod-X and they don't take up much space on my power strip. I could in 3 of them and still have 3 sockets available on my 6 socket AC Power strip.

RMDumse
08-07-04, 12:33 PM
Thanks for posting that nice tip. The 5V regulator is a low drop out, and the 5V is only used for the CAN bus tranciever part, so the rest of the board is all 3.3V based. Since these are linear parts, the less voltage they drop, the more current they can output, and still stay below the temperature limits.

Pacetech
08-11-04, 07:05 PM
Originally posted by Pacetech
Just FYI. In case anyone is looking for a nicer AC Power Supply.

I'm now using a 6V regulated adapter for my Isopod V2 and Isopod-X and it works great. The 5V regulator is much cooler. The 3.3V is still warm (still dropping 5V to 3.3V), but I found that I can draw another 100 mA off the 5V without resetting the board.

Before I was only able to draw 50mA off the +5V supply for my optical encoders, now I'm pulling 150mA with no problems.

Digikey PN T451-P5P-ND Its has 2.1mm plug, fits in the Isopod-X and they don't take up much space on my power strip. I could in 3 of them and still have 3 sockets available on my 6 socket AC Power strip.

Tried to FLASH OVER JTAG and it didn't work with this 6V adapter. Works with the NMI supplied adapter.