First link is the same one by 8 Bit Dreams, but sold via Amazon in batch of 10.
Questions about MeanWell RT65-B
- Thread starter fpmpaolo
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Correct. I didn't see the back side plus I was a bit confused by the description.
You solder the 12v pads and you connect your 12.7v to the in and gnd.
The output goes to v+ and gnd.
Just confirm with 8bitdreams that "en" means enable and it is connected to in+, so it makes the board always on.
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Still digging the hole...
I managed to setup my MeanWell for my 2 Amigas. I have a A600 vampire V2 + ChipRam and a A1200 + Terrible Fire.
5V on MeanWell is set at plain 5.00V. No DC-DC converter used since I really don't know how to solder it.
A600 boots and work, A1200 TF doesn't. If I pull away the TF it boots.
Should I increase the 5V up to 5.1v maybe, in order to get plain 12V?
Plain 5V gives me 11.50V on +12V.
I noticed there's a DC-DC converted soldered on the Terrible Fire.
I managed to setup my MeanWell for my 2 Amigas. I have a A600 vampire V2 + ChipRam and a A1200 + Terrible Fire.
5V on MeanWell is set at plain 5.00V. No DC-DC converter used since I really don't know how to solder it.
A600 boots and work, A1200 TF doesn't. If I pull away the TF it boots.
Should I increase the 5V up to 5.1v maybe, in order to get plain 12V?
Plain 5V gives me 11.50V on +12V.
I noticed there's a DC-DC converted soldered on the Terrible Fire.
Meanwell PSU in A1200 + Terrible Fire = NO WORK.
Meanwell PSU in A1200 = WORK.
Meanwell PSU in A600 + Vampire = WORK.
That's what I'll do this afternoon.
I have a bunch of DC-DC converter but I don't understand how to solder them.
I had my DC-DC converter soldered.
01. Blob on 12V + cut where ADJ is.
02. IN+ soldered and connected to the MeanWell on 5V.
03. GND soldered and connected to COM
04. V0+ soldered and connected to +12V rail on Amiga.
Still not working. Meanwell must be set at 5.7 to switch A1200 + Terrible Fire on.
01. Blob on 12V + cut where ADJ is.
02. IN+ soldered and connected to the MeanWell on 5V.
03. GND soldered and connected to COM
04. V0+ soldered and connected to +12V rail on Amiga.
Still not working. Meanwell must be set at 5.7 to switch A1200 + Terrible Fire on.
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Hello,
Please excuse my ignorance - had a bad time in a past three weeks, real life has eaten all my spare time..
Yes that's the first step You need to do, and You've done it correctly
NOPE! NEIN! NICHT!
You can't get 12v out of the 5V!
You need to connect 12v of the MeanWell PSU to the input:
Yes! Check!
Nope! You really need two wires from MeanWell: +12V and GND!
Output of the DC converter goes to Amiga
Depends on that where this measurement was done - this power cable that goes to Amiga has reasonable resistance, so please do Your measurement on the TF1260 card itself, or Floppy power connector should have nice 4.95 4.99V and 11.7V or near on 12 V rail...
Best regards,
8 Bit Dreams
Don't worry. Hope it's ok now for you.Hello,
Please excuse my ignorance - had a bad time in a past three weeks, real life has eaten all my spare time..
Sorry. My mistake.
IN+ was connected to MeanWell "V2" rail. That's the +12V.
So +12V and GND must be connected to +12V?
Measurement was done on the floppy power connector.
If i set MeanWell at 5.70, floppy will get 4.90 something.
I will modify my cable and test it again.
GRAZIE - DANKE - THANKS.
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No! Don't do this! If You do so - Your DC - DC converter will possibly burn!!!
Please see the picture above in my previous message!
You really need 4.99V measured on the Floppy connector or TF accelerator. No need to measure on the MeanWell
What about volt-meter and amperometee I have? Do I have to unplug it ?
I’ll try to test tonight.
It doesn't matter. It is just a not very useful add-on for decoration purpose.
Plain MeanWell RT-65B - no boards, only cables from the PSU to Amiga1200.
I have plain 5V and 13.50V on the 12V rail. Measured on the FDD.
=== === ===
Installed the DC-DC Converter.
If I set plain 5V measured on the FDD, I get 12.80 on the +12.
It drives me nuts. When I had my board soldered, I had about 12.10 on the 12V rail but we measured it with professional tester and not on my mean well.
I mean, we powered it with 12.50 and got 12.10 on the DC-DC thing.
=== === ===
I tried also this one
It gives me 5V plain and 12.60V .
If I turn the knob, nothing seems to happen.
=== === ===
I tried also this one
This has a quite strange behaviour.
5V on the 5V rail... 3.50 on the 12V rail but A1200 TURNS ON AND WORKS.
I'm goin' nuts
I have plain 5V and 13.50V on the 12V rail. Measured on the FDD.
=== === ===
Installed the DC-DC Converter.
If I set plain 5V measured on the FDD, I get 12.80 on the +12.
It drives me nuts. When I had my board soldered, I had about 12.10 on the 12V rail but we measured it with professional tester and not on my mean well.
I mean, we powered it with 12.50 and got 12.10 on the DC-DC thing.
=== === ===
I tried also this one
It gives me 5V plain and 12.60V .
If I turn the knob, nothing seems to happen.
=== === ===
I tried also this one
This has a quite strange behaviour.
5V on the 5V rail... 3.50 on the 12V rail but A1200 TURNS ON AND WORKS.
I'm goin' nuts
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It is.
5V to 5V amiga.
+12 from meanwell to IN dc-dc.
OUT from dc-dc to Amiga.
COM meanwell to GND dc-dc.
COM from MeanWell to GND Amiga.
Yes. And I’m getting nuts.
This is my schematics
5V to 5V amiga
2 cables from COM: one straight to Amiga, one on the dc-dc
12V from dc-dc to Amiga.
On the back, soldered a blob on 12V and cut ADJ.
Attachments
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