mattias Posted November 2, 2006 Report Share Posted November 2, 2006 Wouldn´t this be good for MBFM?It´s like 20 euro from ELFA.. Maybe Ishould get one for my SID also?What about fuses, were do i put them? Quote Link to comment Share on other sites More sharing options...
seppoman Posted November 2, 2006 Report Share Posted November 2, 2006 Hi,looks nice. What are the voltages of S1..S3?If you want a ready to use PSU, take a look at pollin.de - they have a +5/+12/-12V regulated PSU with mini-DIN connector (like PS/2) for only 3.95 Euros:http://www.pollin.de/shop/shop.php?cf=detail.php&pg=OA==&a=MDU0OTQ2OTk=&w=Njk1OTc5&ts=0They ship internationally - don´t know the postage though...Seppoman Quote Link to comment Share on other sites More sharing options...
mattias Posted November 2, 2006 Author Report Share Posted November 2, 2006 Can´t say.. I am not an electronics expert. I think 8.5 V s1 and 14 V s2 and s3!! But here is the data from elfa. Mfr. Noratel (former ToroidToroidal core transformer adapted to produce 5 and ±12 V regulated direct voltage. Designed to provide sufficient voltage down to 10% for low mains voltage. Primary voltage 230 V, centre tap for 115 V. Fusing is best performed on the secondary side with a fuse value as close as possible to the winding's rated current. Simple installation with a single centre bolt. Primary voltage: 0 (black)-115 (white)-230 V (yellow) Secondary voltage: 8.5 V (white-black)+2×14 V (green-red, brown-blue) Certificates: UL Manufacturing standard: EN61558 Connection: Cable, 200 mm Output Voltage Dim Weight Type VA Vac mm kg AA-18120-TI 55 (25 + 2×15) 8.5 + 2×14.4 Æ82×h35 0.7 AA-18420-TI 120 (70 + 2×25) 8.5 + 2×14.1 Æ93×h47 1.2 Max IDC Max IDC Rec. cap. Rec. cap. 5 V output 12 V output C1 C2, C3 Type A d.c. A d.c. ?F ?F AA-18120-TI 2.0 0.8 15000 2200 AA-18420-TI 4.5 1.0 22000 4700There is 2 kinds as you can see. But anyhow your alternative looks very interessting since it´s totaly plug and play.../Mattias Quote Link to comment Share on other sites More sharing options...
seppoman Posted November 2, 2006 Report Share Posted November 2, 2006 Hi,8.5 and 14 V is perfect. If you go that way, just take the cheaper variant, it still is way stronger than necessary.Seppoman Quote Link to comment Share on other sites More sharing options...
AndrewMartens Posted November 3, 2006 Report Share Posted November 3, 2006 Wow, toroidal transformer and everything. Very nice!I'm probably going to make do with a crusty old 24V transformer I looted from a spare parts / junk box at my old company... Quote Link to comment Share on other sites More sharing options...
b-funk Posted December 16, 2006 Report Share Posted December 16, 2006 that´s exactly what i´m looking for...any hints where to get this one in germany? ordering it directly from elfa is too expensive - they demand 45 € for delivery to germany :o Quote Link to comment Share on other sites More sharing options...
Echopraxia Posted November 2, 2007 Report Share Posted November 2, 2007 Hey doors did you end up going with this power supply that you were thinking about? How did it fair? Would you buy it again for next mbfm? What is the model number? Quote Link to comment Share on other sites More sharing options...
warland Posted November 17, 2007 Report Share Posted November 17, 2007 Toroidal transformers are always the best choice over other transformer designs.In simple terms they are more efficient and due to the "closed" magnetic aspectsof their construction are less prone to produce EMF type noise.As to fusing, remember a fuse or circuit breaker is intended to protect what comesafter it in the circuit, NOT what comes before it. In this schematic a fuse of no morethan the primary winding's rated current should be fitted. In this case I would fit a500mA fast blow in the "live" wire of the primary. This particular tranny appears tohave a tapped primary for connection to 2 different supply voltages. (probably 110 or 220-240). Never fit a fuse in the return or neutral side of the primary as if this blows and the device is still connected to the AC supply, a lethal voltage is still presenton the tranny.The secondaries should be protected by a 1 Amp slow blow on each secondary. In thiscase one in connected between the white wire and the bridge rectifier and one connectedbetween the green wire and it's bridge rectifier should be sufficient. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.