Recent Posts

31

Repair / JBC SL-2300

« Last post by lionelkjh on Today at 04:46:31 pm »

Good evening; I am currently repairing a JBC SL-2300 soldering station which fully regulates the temperature...After disassembly; I notice that the electronic card has 2 wires at a corner of the card where the sector arrives; which justifies the inoperative regulation... My question is therefore: what is this component replaced by a piece of wire? Resistors; diodes?? What are their respective values? In addition I would also like to replace the complete iron because some parts are missing....Here are the card references: JBC 0223395...If anyone can help me find these 2 missing components as well as the iron; that would be great! I am attaching the photos I took.....Thank you for your valuable help!

32

General Technical Chat / Re: Do you think an LED is a resistor?

« Last post by BU508A on Today at 04:46:14 pm »

Because I am discussing the FUNDAMENTAL nature of the diode.

This is the fundamental behaviour of a diode. Doesn't really look like a resistor.

33

Test Equipment / Re: Choosing between entry-level 12-bit DSOs

« Last post by KungFuJosh on Today at 04:45:42 pm »

Re-hacking after a firmware update is normal on many oscilloscope hacks.

Not on Siglent. Once a feature is unlocked, it stays that way.

34

General Technical Chat / Re: Do you think an LED is a resistor?

« Last post by PlainName on Today at 04:44:27 pm »

It is what it makes it a diode

That's what you  keep getting told. A diode has non-linear resistance. A resistor has linear resistance.

So you agree that a diode is a nonlinear resistor.

But you don't think that nonlinear resistors are... resistors. Correct?

I think you need to take a course in reading comprehension. Ask an optician why you keep seeing 'resistor' where it really says 'resistance'.

35

Other Equipment & Products / Re: Faxitron MX20 x-ray problems...

« Last post by rickells on Today at 04:44:22 pm »

Newer BiOptics Bio Vision BioVision Faxitron units  ca. ~ 2009 - 2015

See:
https://www.eevblog.com/forum/reviews/faxitron-biovisionbioptics-win7-(pci-resource-issue)/new/#new

36

Beginners / Re: Replacing SRAM IC with Flash

« Last post by VEGETA on Today at 04:43:37 pm »

Use a larger FRAM device, like FM28V100, though you will need to make a small interface board to interface the 32pin SMD to DIP28. This gives you the option to add in 2 jumpers, allowing you to have 4 images in the FRAM, each totally separate.

i am limited with the n64 itself, its memory is 32kx8 arrangement. i don't know if it can accept larger ones.

it also requires parallel interface... too bad since spi and other interfaces are very cheap!


do you know any solution i can use to maneuver this? like using a 1 mbit ic but still let it act as 4 separate 256k (32kx8) ic... or create an interface to convert the parallel ram to spi ram and vise versa.

No you can not do this, flash is slower than normal Sram.
However you mention is not flash it is ferroelectric and according to the specs comparable with your SRAM.
I don't know enough of this type of storage to give you any valid advice 

Benno

original is sram and existing solution is fram... but i ask if same size flash can be used.

upon checking again i only found this one: https://www.digikey.com/en/products/detail/rochester-electronics-llc/N28F256A150/12129264

the rest are otp eeproms and uv eeproms.... then comes the fram ones. fram\mram are very expensive.

this one is normal eeprom: https://www.digikey.com/en/products/detail/rochester-electronics-llc/TMS27PC256-17FML/12135079

it is marketplace but still very cheap.

37

RF, Microwave, Ham Radio / Re: Detecting very low power motion sensors

« Last post by glradio on Today at 04:43:04 pm »

As stated prior, look around at 10.525GHz X-Band and if not then it may be Ku band at 24GHz. X-band can penetrate cinderblocks ...

Yeah my guess would be above the frequency the tinySA can see.  Typical frequencies for proximity radar are 10.525 GHz, 24 GHz and 77 GHz.  10 GHz is possible with a slightly higher end SDR like the SignalHound.  For the higher frequencies you are going to have to work harder or pay a lot more or both.

TinySA Ultra can detect motion sensor frequencies around 10 GHz, in these examples (see link 1 , 2 , , 4), however, the sensor is in direct contact with the spectrum analyzer.

In my case there is no direct contact, but by setting the exact frequencies at which these sensors operate I expect to see some signal ...

Another possibility would be ultrasonic, like automotive parking sensors.  If you aren't completely sure it's radar based I would look for ultrasonics.

Could ultrasonic sensors work reliably through a wall ?

Is it possible to somehow detect the emissions of ultrasonic sensors placed behind a wall ?

38

Other Equipment & Products / Re: Faxitron Biovision/Bioptics Win7 (PCI resource issue)

« Last post by rickells on Today at 04:38:56 pm »

BiOptics Bio Vision Faxitron  xR system sub-assemblies:
( NB:   have  no HD, no CD Rom: no system software for it. )    
   System SW likely tied to the two MAC addresses in the system Win7 mini-CPU.

Can't find detailed .pdf  Instruction nor User manuals for:

1)  The Oxford Instruments Jupiter 5000   P/N 93089 50um Spot size 50kV xR tube.
2)  The unmarked 10cm x 15cm xR flat panel detector " Model VIS-1015"  NC0615-F226 ( ca. 2015, revised from 2010 )

3) unknown PCI card  for unknown 10cm x 15cm xR FP Det. in Bio Vision Faxitron unit ( 2010, 2015).  
  I/P are two Belden 1855a mini 59 coax cables: 75 Ohm video.( not fiber optic cables ! )

>> .... anyone ?
 
 Faxitron BiOptics Bio Vision  ( ca. 2011 or so ... )  system components:

**
Oxford Instrument xRay tube:
Jupiter, DS062 series 5000 , air-cooled
P/N: 93089
Target: W   (Tungsten)
Filament Spot size: 50 um
Filament Voltage ~  2.0V nom.,  Current 1.7A
  data sheet ( 2pgs):
      https://xray.oxinst.com/x-ray-tube-products/x-ray-tube-assembly-radiation-shielded/jupiter-5000-series:
P/N; 93089
Jupiter Pkg. Outline Drawing: 8166Anode current 1.0mA10 to 50 kV

>>  User / Instruction Man.  ??

**
xR FP Detector:  ...   Unknown
 Flat Panel xRay Detector: 10cm x 15 cm active area
   Black carbon fiber top.
     physical size: " 8"x10", ~ 1/2" thick;  wired.
-- O/P: flat thin white ribbon cable ~1" wide   to  > small Faxitron PCB > 2 Belden 1855a coax cables  > PCI card in CPU.   Belden 1855a mini 59 coax,  video coax 75 Ohm, 6GHz
( two coax cables,  labeled: G, &  P ; are Not fiber optic cables  )
     https://catalog.belden.com/techdata/EN/1855A_techdata.pdf

--  Power (?) : small white 6-pin connector.

 xR FP  has No Mfr name,  labeled:
 " Model VIS-1015   Rev. B  "
NC0615-F226Date: 07/30/2015 (Revised)( Original 01/12/2010 )

>>  Mfr.  ??    Drivers

O/P: flat white fragile thin ribbon cable  > going to a small Faxitron PCB  > two black Belden 6GHz Video cables ( "P" & "G" )   > PCI card in the Win7 Faxitron computer.
Belden cables: 1855a shielded 6Ghz HD-SDI Precision Video Cable


**
Win7 CPU

PCI card:  unknown  ??

nb:   Rear of CPU:  small Faxitron PCB J1 black 4-pin connector ( for testing ? )
  adjacent to PCI card slot.  Faxitron # 43805-80309

>> PCI Drivers  ....  anyone  ??

**
Open Frame LV  PS:Integrated Power Designs 24V  DC    5A   5V  DC  15A

**
Spellman HV  PS    24V DC  >  0 to 50 kV 1.5mA
P/N: X4196Model# MNX 50p75x4196  

75 Watt unit: MNX50P75
   Option: 4196 ??
   2 pg. data sheet:
      https://www.spellmanhv.com/en/high-voltage-power-supplies/MNX
   Instruction & User Guide:
      https://www.spellmanhv.com › - › media › en › Technical-Resources › Manuals › MNXMAN.pdf

**
Battery Backup : two (2)  Tripp-Lite heavy modules:

a) Tripp-Lite HC350rkBattery Charger / Inverter PS Series AGTR0829
     https://tripplite.eaton.com/main/search?q=HC350RKhttps://tripplite.eaton.com/350w-medical-grade-power-inverter-remote~HC350SR

b) Tripp-Lite Battery Pack BP12V54https://assets.tripplite.com/product-pdfs/en/bp12v54.pdf
     https://tripplite.eaton.com/?q=BP12V54

HC350rk +BP:  battery backup may not be required,  but  has three (3) Signal cables that go to the front panel & system;COMM1, COMM2 two Cat-5 cables go upwards, to the front panel PCB's.  & a USB cable going to the Win7 CPU.
   -- Could lack of the 3 Signals from the Bt Bk-up COMM1, COMM2 &/or USB  cause a halt of operation ?

 >> Anyone having a CD-Rom for this unit please PM me.

39

Beginners / Re: Convert US standard 115V to International 230V

« Last post by IanB on Today at 04:37:34 pm »

Radiolistener, can you delete your posts?

You have not read the thread, and you are just adding a whole bunch of useless noise on the end of a solved problem.

40

Test Equipment / Re: SDS800X HD Wanted Features

« Last post by eTobey on Today at 04:37:00 pm »

Another feature would be helpful right now:
Individual gates for each measurement (or just two) in the measurement mode.