minimig powersuply

[Norway]

Anybody knows what the powerconsumption is for the minimig? i have a ac dc adaptor that has 4 wats outputpower at 4,5 volts. can i use it? the centerpin is positiv.

[Firedawg]

@Norway

I use this  Power Supply.

Mike

[Norway]

thank you, mine is 4,5 volts. but the huge 20w powersuply i got from amigakit was also set at 4,5v. i am going to put that beast aside now. :-)

[Pyromania]

@Firedawg


Works good for you on your minimig?

[Darrin]

I use a variable output PSU on my Minimig set at 4.5v and it works fine.

[boing4000]

Minimig needs max. 150-200mA without PS/2 components.
With keyboard and mouse the PSU should provide at least stable 500mA. 1A and more are just for reserve and additional stabilizing.
Maximum power consume (200mA) is for about 1.5 sec while the FPGA is "booting". After uploading the firmware (minimig1.bin) the FPGA will internaly checksum the uploaded binary. this takes more power then normal operating but just for a short time.

[alexh]

I still need to get a shaver adapter for mine. It arrived months ago and has still never been used.

[boing4000]

alexh wrote:
I still need to get a shaver adapter for mine. It arrived months ago and has still never been used.

Dont you have any other PSU for test? I also have one from an d-link router, it provides same polarity and voltage (5V) with the same plug into minimig.

In any case please check the polarity and output voltage at least once bevore plugging in! A bit too much or too little voltage will not directly harm but surtenly a negative polarity will.

[alexh]

My MiniMig is on loan from Acube. I wouldn't want to blow it up.

[meega]

@anybody

Make sure that the power supply is regulated, so that you don't push excess volts in there. Unregulated supplies can easily rise to 50% or more above the "rated" level when the current being drawn is small. You might even consider using some batteries instead of a mains converter.

[rkauer]

 The board itself don't have 3.3 and 5V regulators? :-?

[boing4000]

rkauer wrote:
 The board itself don't have 3.3 and 5V regulators? :-?

The board has regulators for 3.3, 2.5 and 1.25 Volts. The 5V from input are for the blue LED and to directly supply both PS/2 and joystick ports. All the other components on minimig are working at 3.3V. The FPGA is internaly working at 2.5 and 1.25V.

There are capacitor to stable voltages but the 5V source must also be stable enough to let minimig work fine.

[polardark]

Just got my two minimigs from the Amigakit store. Just to be on the safe side i ordered two power supplies for them. What was actually in the box however was two of those big unregulated "universal" type AC adaptors with the voltage and polarity glue-gunned to the appropriate settings.

Basically this means i'll be putting unregulated (approximated) 5v directly from the mains into the minimig. The house where i live is 70 years old and i'm not sure if i even dare to power the minimig without a regulated power supply.

Now i must come off sounding like a complete {bleep} here but what i'm wondering is what kind of fluctuations is the minimig able to handle if i use this power supply from amigakit?

Thanks.

[boing4000]

I dont know this PSU from Amigakit, but if this is a normal AC adapter it can handle some fluctuations in AC part. All this AC adapter do have some regulation and capacitor to support stable output voltages.
Minimig just need about a maximum of 200mA without PS/2 components. That is very few current and even with PS/2 the PSU easily should handle it :-)

Else many other ppl with Amigakit PSU should report problems. Until now I dont read anything about that.

[beller]

I'm using the AmigaKit UK PSU with a US adapter.  In the couple of months I've had it there hasn't been any issues.

Bob