Quote:
Originariamente inviato da Eddie666
...infatti io utilizzo proprio quello per alimentare il mio pico psu; l'unica cosa č che ho dovuto modificare il connettore di uscita per renderlo compatibile con quello del pico psu...
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Complimenti
per il bel lavoro, l'avevo notato in un altro thread di silentpc
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Vorrei chiederti una spiegazione per questo dal link che ho postato prima (mi ha un po' spaventato)
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Qui spiega i collegamenti del connettore dell
1: N/C. Soldered to a through-hole in the adapter's PCB, but that through-hole is not connected to anything else on the PCB.
2,3,4 : +12V. Three white wires to carry the outbound current. Two meters of 16 gauge copper is about 24 mOhm, and 18 Amps through that would be about a 425 mV drop, so this adapter triples the wire, dividing the drop by three (i.e. 142 mV at max current). The three wires solder together into one big hole in the adapter's PCB.
Pin 5 : 'Trigger.' There's a pullup resistor in the brick which causes this signal to float up to a few volts. Short this line to ground, and the adapter goes from Standby (amber LED) to On (green LED).
Pins 6,7,8 : Ground. Three black 16g wires. They have to carry all that 18 A current back to the adapter, so unfortunately, this means that 'ground' inside this PC is up to 142 mV higher potential than earth. All three are soldered together into one hole in the adapter's PCB ground plane.
Aside: The adapter's PCB ground plane is then directly connected to the earth pin of the AC mains connector. Thus the 142 mV 'ground' on my mobo could create issues if I had an external (e.g. USB) peripheral that powered by a power adapter with three-wire mains that was similarly connected. I could wind up dumping quite a lot of current through the shield on a USB cable. Perhaps I shouldn't be surprised to see this, in cost-sensitive consumer commodity designs (i.e. a Dell laptop), but it's something to keep in mind when using this type of setup.
Qui spiega come ha creato un connettore adatto ad "alti amperaggi"
The PW-200-V came with 12 inch power input leads (18 gauge wire!) terminated with a 5mm barrel connector socket. Most users who've posted on these forums have gone to Radio Shack etc and found a plug to fit it. However, barrel connectors like this are generally rated for less than one amp. I opted to keep the Dell power-brick and it's connector intact, and find a mating connector. I desoldered the 24-pin ATX power socket from an old ATX motherboard. I cut it in two (leaving only positions 1-4 & 13-16), to make myself an 8-pin connector which mates perfectly with the connector on the Dell brick. These Molex connectors are rated for 6 A per pin.