minimig powersuply

[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

[redrumloa]

boing4000 wrote:
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.

That seems like a bit high? From Acube:
[color=ff0000]Power: +5VDC (approx 100mA without mouse) [/color][/i]

A standard keyboard would require 50-mA maximum (with three LEDs ON) and mouse would max out at about the same. I'd say 300mA would be sufficient.

[boing4000]

I dont know who wrote this, but this one never really measured the current. I did it using a laboratory power suppley. There is a maximum peek of 200mA only while the FPGA is booting (short after loading up the minimig1.bin and 1st reset).

In normal operation there is 135mA of current (FPGA and CPU active).
I could only get about 110mA without loaded FPGA core but this is non normal operation state. 100mA was never seen here :-)

Or just try to measure at your own minimig, perhaps it take more or even less mA... I can only say what I found out.

[freqmax]

What's the consumption when running some intensive game/demo or such?

[boing4000]

That makes no different, The Amiga chipset is always working at "full speed", only some big blitter action could cause more heat in real (Fat)Agnus. In FPGA there is no more or less power consume if the Amiga is running a complex demo/game or just showing the kickstart hand.
The real 68000 cpu is also all time working, no halt-instruction will block it. This is doe to the minimig internal hardware design (Verilog).

Only when the PIC is operating (floppy drive simulation) the power consume could slightly rise about 45-50mA.

[redrumloa]

boing4000 wrote:
I dont know who wrote this, but this one never really measured the current. I did it using a laboratory power suppley. There is a maximum peek of 200mA only while the FPGA is booting (short after loading up the minimig1.bin and 1st reset).

Interesting findings :-) What was the supplied lab voltage, I mean specifically (110V/120V/130V etc).

[boing4000]

Input 230V~ only (germany).
Output voltage is adjustable from 0V to 24V.
Ampere can manualy set to a maximum limit of 0mA to 800mA.
Both is displayed via digital numbers (0.2 sec update time).

[freqmax]

@boing4000:
There will be a difference in power consumption when gates are changing between 1 and 0, and when they aren't. So I think we are likely to see a difference in power usage between showing the kickstart logo. And playing an intense demo.

[boing4000]

Yes I know that. The FPGA is working at a very low speed (28MHz) and could work up to 250MHz. All internal gates of all components are static switches (like S-RAM). The FPGA core is operating at 1.25V.
Depending on that the power consume will not grow much if some internel parts like blitter, copper, cpu etc. is active or inactive.
I did check it out but you can also do it by your self :-)