- Alternatinve for a 2sd882 npn - 9 Updates
- Testing Astec AA21430 power supply - 3 Updates
| Lmm Cams <lmmcams@gmail.com>: May 31 01:20PM -0700 Dose anyone know of a common (ie i may find one in some peice of pcb i have in a draw of stuff) chip i could use in place of a 2sd882 ? its one of these https://datasheetspdf.com/pdf/627067/NEC/D882/1 |
| Lmm Cams <lmmcams@gmail.com>: May 31 01:41PM -0700 On Sunday, May 31, 2020 at 10:20:43 PM UTC+2, Lmm Cams wrote: > Dose anyone know of a common (ie i may find one in some peice of pcb i have in a draw of stuff) chip i could use in place of a 2sd882 ? > its one of these > https://datasheetspdf.com/pdf/627067/NEC/D882/1 I found a TIP 142... |
| abrsvc <dansabrservices@yahoo.com>: May 31 02:43PM -0700 On Sunday, May 31, 2020 at 4:20:43 PM UTC-4, Lmm Cams wrote: > Dose anyone know of a common (ie i may find one in some peice of pcb i have in a draw of stuff) chip i could use in place of a 2sd882 ? > its one of these > https://datasheetspdf.com/pdf/627067/NEC/D882/1 Why an alternative? Digikey has almost 3000 in stock. |
| Lmm Cams <lmmcams@gmail.com>: May 31 03:00PM -0700 On Sunday, May 31, 2020 at 11:43:16 PM UTC+2, abrsvc wrote: > > its one of these > > https://datasheetspdf.com/pdf/627067/NEC/D882/1 > Why an alternative? Digikey has almost 3000 in stock. Cus I need it v soon and I live in France so that means a weeks delivery.... |
| Phil Allison <pallison49@gmail.com>: May 31 08:20PM -0700 Lmm Cams wrote: ------------------ > Cus I need it v soon and I live in France so that means a weeks delivery.... ** A BD139 would very likely be fine. Similar specs, same pak ( TO126 ) https://datasheetspdf.com/pdf-file/1293281/Toshiba/BD139/1 ...... Phil |
| Phil Allison <pallison49@gmail.com>: May 31 08:21PM -0700 On Monday, June 1, 2020 at 7:43:16 AM UTC+10, abrsvc wrote: > > its one of these > > https://datasheetspdf.com/pdf/627067/NEC/D882/1 > Why an alternative? Digikey has almost 3000 in stock. ** Not even faintly similar - cos it is a Darlington pair in a very different pak. ..... Phil |
| Phil Allison <pallison49@gmail.com>: May 31 08:23PM -0700 Lmm Cams wrote: ------------ > I found a TIP 142... ** Not similar at all. ..... Phil |
| Mikko OH2HVJ <mikko.syrjalahti@nospam.fi>: Jun 01 09:00AM +0300 >> Why an alternative? Digikey has almost 3000 in stock. > Cus I need it v soon and I live in France so that means a weeks delivery.... I think the delivery is much faster, they're using UPS, not postal services. Two weeks ago I got my parts to Finland in less than 48 hours, albeit to Helsinki capital region. -- mikko |
| Lmm Cams <lmmcams@gmail.com>: Jun 01 01:45AM -0700 On Monday, June 1, 2020 at 8:00:53 AM UTC+2, Mikko OH2HVJ wrote: > albeit to Helsinki capital region. > -- > mikko I did try rswww.fr but they were business only... Will try digikey. For now I've ordered them off eBay.fr I am repairing a perimeter alarm for a friend, she has two transmission boxes, both failed with the same chip going short b-e. Seems they may need a biger heat sink... |
| Julius Henry Marx <sawbona@gmx.net>: May 31 01:48PM -0700 Hello: For a Raspberry Pi 3B+ setup I am working on I would like to use an Astec AA21430 power supply I can get for ~ US$10.00. It seems to be ex-Cisco (part# 34-1609-02) and would be ideal as it puts out 9.50A @ 5.0V which I expect that given its provenance should be stable and solid at least up to 8.50A. The thing is that I *already* have a couple of Sun Microsystem power supplies I have never been able to use because I have not found a way to actually *start* them (power switch does nothing) and although I searched high and low, never found a way to do it. I don't want to pile up *more* unusable hardware so I'm asking here before I go out and fetch it. This Astec PS seems to be a simpler affair: the cable connector is a keyed Molex 90331 and the outputs are labeled P1 through P6. P1 - purple = -12.0V 0.5A max P2/P5 - black = COM P3/P4 - red = +5.0V 9.5A max P6 - yellow = +12.0V 1.2A max In another life, when tested ATX power supplies to recycle, had a bridge with a female 24 pin socket and wire shorting PS_ON to ground but I have no idea if this power supply will start with its own power switch or if it needs something else. I'd appreciate any input from those who know more about this type of PSs. Thanks in advance. JHM |
| Jon Elson <elson@pico-systems.com>: May 31 04:28PM -0500 Julius Henry Marx wrote: > no idea if this power supply will start with its own power switch or if it > needs something else. > I'd appreciate any input from those who know more about this type of PSs. Most supplies of this type need a load to regulate properly. Probably 1 A on the 5 V output would be sufficient. Find a 5-10 W 5 Ohm resistor and then just apply AC power and it should work. Jon |
| Julius Henry Marx <sawbona@gmx.net>: May 31 02:43PM -0700 On Sunday, May 31, 2020 at 6:28:14 PM UTC-3, Jon Elson wrote: > Most supplies of this type need a load to regulate properly. Probably 1 A > on the 5 V output would be sufficient. Find a 5-10 W 5 Ohm resistor and > then just apply AC power and it should work. Thanks for such a fast reply. Apparently there's no other connection between the PS and the equipment it belongs to, so that may well be the solution. I'll get the PS and try that. Thanks for your input. JHM |
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