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Search: Posts Made By: japlytic
Forum: Equipment Usage, Soldering, Techniques, and Reviews 10-24-2018, 02:51 AM
Replies: 14
Views: 732
Posted By japlytic
Re: Aliexpress oscilloscope....good idea/bad idea ?

Hantek generally has good hardware, but their weak spot is the software.
Forum: Troubleshooting Power Supplies and Power Supply Design 10-24-2018, 02:49 AM
Replies: 2,975
Views: 708,091
Posted By japlytic
Re: Power supply build quality pictorial. part 2

VSN-011 Arcade Power Supply (+5V/7A, -5V/1A, -12V/1A)

All capacitors are QRT brand unless otherwise noted.
100uF 400V Chemi-Con primary side filter.
3300uF 10V x2 before +5V inductor with 3300uF...
Forum: Troubleshooting & Designing Networks 10-12-2018, 08:15 PM
Replies: 2
Views: 130
Posted By japlytic
No shares within a workgroup appearing

On a new Windows 10 install, I cannot see other computers on the network even though I am on the correct workgroup name despite seeing other network devices which do not use a workgroup and that...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 07-24-2018, 06:34 AM
Replies: 4
Views: 237
Posted By japlytic
Test equipment and 1PPS inputs

You've most likely seen test equipment with an external reference clock input, but I think a 1PPS input (or support for it) should also be included considering it is easier to route a 1PPS signal...
Forum: General Electronics Technical Discussion 07-07-2018, 01:35 AM
Replies: 14
Views: 503
Posted By japlytic
Re: PAL Connectors on TVs

I've read that Belling-Lee, the inventor of this connector, has advised that this connector is only suitable for radio and not TV, and for that reason, I insist on F connectors on both sides of the...
Forum: Troubleshooting & Designing Networks 07-02-2018, 02:24 AM
Replies: 5
Views: 471
Posted By japlytic
Re: Wireless access points and Local Network IPv6 State

To clarify, the router for Internet access has DHCP enabled for both IPv4 and IPv6.
Forum: General Electronics Technical Discussion 06-23-2018, 09:27 PM
Replies: 16
Views: 682
Posted By japlytic
Re: Digital AC100-300V BLUE LCD DISPLAY PANEL VOLT/AMP meter WITH SPLIT 0-100A CT

On my unit, I used a digital voltmeter display which has a minimum voltage of 60 VAC, but the display was just visible down to 30 VAC - this would be unreasonably low, since the connected appliance...
Forum: Troubleshooting & Designing Networks 06-23-2018, 09:23 PM
Replies: 5
Views: 471
Posted By japlytic
Smile Wireless access points and Local Network IPv6 State

On a Technicolor TG800vac being used as a wireless access point (DHCP turned off and IP address not within DHCP range of another router), I had a problem where Android devices would not connect to...
Forum: General Electronics Technical Discussion 05-07-2018, 02:26 AM
Replies: 4
Views: 250
Posted By japlytic
Re: Do NTC inrush limiters wear out?

On a related subject, the "on" resistance of PTC resistors will increase to the point where it will be unusable every time the maximum current is exceeded.
Forum: General Capacitor Questions & Issues 05-07-2018, 02:19 AM
Replies: 5
Views: 436
Posted By japlytic
Re: Replacing Rubycon CE W with Rubycon YXF

From what I see, general purpose units are suitable for this application since the aforementioned units use a linear (non switching) power supply.
Forum: General Computer Discussion 03-13-2018, 03:54 AM
Replies: 0
Views: 166
Posted By japlytic
Lightbulb Connecting to Bluetooth LE-only devices

With an HM10 Bluetooth Low Energy (LE) module, the Bluetooth dongle (without LE support) connected to my computer would not detect the HM10 while my smartphone with LE support can; so therefore, the...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-09-2018, 06:05 PM
Replies: 9
Views: 415
Posted By japlytic
Re: Replacement Rifa caps for Astec PSU

I forgot to say that the 0.22uF X unit should also be replaced (X-class, safety type).
Forum: General Electronics Technical Discussion 02-09-2018, 05:58 PM
Replies: 8
Views: 401
Posted By japlytic
Re: "Anticounterfeiting" technology

With printer cartridges, the companies are basically fuelling the problem, and I have seen printers on sale at prices worth more than the cartridges from time to time which would highlight the...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-09-2018, 05:56 PM
Replies: 9
Views: 415
Posted By japlytic
Re: Replacement Rifa caps for Astec PSU

The 2200pF VDE unit is a Y-class (safety) unit, and the 0.68uF unit can be replaced with a polyester unit.
In addition, I recommend replacing the other 2200pF VDE unit (near C4) along with C37 and...
Forum: General Computer Discussion 01-26-2018, 03:53 AM
Replies: 3
Views: 455
Posted By japlytic
Re: Raspberry Pi HDMI problems re. power supplies

I have changed the hotplug option and is OK without the need to delay the DC.
Forum: General Computer Discussion 01-26-2018, 01:25 AM
Replies: 4
Views: 243
Posted By japlytic
Lightbulb Raspberry Pi 3: a heatsink on the SOC is recommended

On a Raspberry Pi 3, I got an overtemperature warning despite not being overclocked during a long compile operation, so I used a stick-on heatsink over the Broadcom SOC and I did not have this...
Forum: General Electronics Technical Discussion 01-25-2018, 01:44 AM
Replies: 4
Views: 323
Posted By japlytic
Re: Why are N-Channel mosfets used here on the battery gauge lines?

I've seen N-channel MOSFETs on power tool battery packs which serve as an overdischarge and overcurrent protection function.
Forum: Troubleshooting & Designing Networks 01-25-2018, 01:41 AM
Replies: 1
Views: 1,458
Posted By japlytic
Smile Netflix VR dropping back to Who's Watching

I had problems where Netflix VR randomly drops back to the "Who's Watching?" screen without an error message, and I happened to catch a network error message when I tried to sign in at one time,...
Forum: Troubleshooting Power Supplies and Power Supply Design 12-29-2017, 12:58 AM
Replies: 13
Views: 523
Posted By japlytic
Re: -12V-less HP server unit: does majority of current boards even require the rail?

PCI slots have a -12V contact while PCI Express slots do not have any connection to -12V.
From what I know, older PCI serial port and older PCI network cards require -12V; later PCI serial port...
Forum: General Computer Discussion 12-17-2017, 09:54 PM
Replies: 5
Views: 313
Posted By japlytic
Exclamation How not to be burned by new Android devices

Here are the two basics:

Look for a commitment from the manufacturer to provide firmware updates for a reasonable time after the device model is discontinued - avoid devices which are not offered...
Forum: General Electronics Technical Discussion 12-16-2017, 09:46 PM
Replies: 10
Views: 601
Posted By japlytic
Re: Use 74LS instead 74HC and 74HCT

74LS/74HCT runs on 5V while 74HC can run on on 3-5V.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 12-16-2017, 09:42 PM
Replies: 10
Views: 859
Posted By japlytic
Re: Conventional vs arbitrary function generators

For new units on eBay, there are more listings for arbitrary units than conventional units.
Forum: General Computer Discussion 11-21-2017, 01:23 AM
Replies: 0
Views: 257
Posted By japlytic
Thumbs up Apple is leading the way...

...in cellular band support for new devices, from what I know.
The ultimate goal I wish to see is for new devices which can connect to a cellular network to support every GSM/UMTS/LTE band from 300...
Forum: General Computer Discussion 11-17-2017, 04:02 AM
Replies: 8
Views: 329
Posted By japlytic
Talking Cellular signal bar scales

I have noticed on Windows Phone and Apple devices that the cellular signal bar scales have five bars while Android devices only have four, and I am curious why.
Fortunately, my automotive audio...
Forum: General Computer Discussion 11-16-2017, 12:56 AM
Replies: 3
Views: 455
Posted By japlytic
Re: Raspberry Pi HDMI problems re. power supplies

I tried chaning the HDMI drive parameter but not the hot plug option.
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