Search found 2674 matches

by haklesup
Tue Aug 28, 2018 12:47 pm
Forum: General Discussion
Topic: i need a long QR type code identified
Replies: 16
Views: 507

Re: i need a long QR type code identified

It likely translates into the same test just above it possibly linking back to an account holder that paid for the postage but I wouldn't expect them to tell you who it is without a warrant.
by haklesup
Mon Aug 27, 2018 11:38 am
Forum: General Discussion
Topic: HDMI Plug\Connector Issues (RANT)...........
Replies: 10
Views: 2041

Re: HDMI Plug\Connector Issues (RANT)...........

sounds like a cold solder joint and working the connector remakes a cold weld for a little while. That's usually what I find when there is finger tip sensitivity to open circuits at a cable connector (where replacing the cable does not seem to help). try a reflow with hot air, water clean flux would...
by haklesup
Tue Aug 21, 2018 3:39 pm
Forum: General Discussion
Topic: Needing ESP8266 help for a wifi clock build.
Replies: 5
Views: 311

Re: Needing ESP8266 help for a wifi clock build.

Looking for info online, I can see modules are either configured in a larger DIP with 30 pins and a smaller board with 8 pin header likely strictly serial. Can I assume you are using the lower pin count version and are planning to interface to a decoder directly using serial methods. I think the hoo...
by haklesup
Mon Aug 20, 2018 1:17 pm
Forum: General Discussion
Topic: TV lacking remote control...
Replies: 5
Views: 290

Re: TV lacking remote control...

"Well, thinking of buying my next TV, plugged back... and it works fine. Now no justification for a new TV :sad: .
Anyway, somehow, Murphy strikes again."

Shoulda started with the reboot, but maybe you want a new TV anyway, the 4K smart ones are reasonably priced now.
by haklesup
Thu Aug 16, 2018 12:03 pm
Forum: General Discussion
Topic: i need a long QR type code identified
Replies: 16
Views: 507

Re: i need a long QR type code identified

I was also able to read a string of nonsense characters probably translated from a binary string but it was all garbage. I couldn't say if that string was correct or scrambled but it was clear one needed the right app with access to the right database. I used the first QR reader app I found in the a...
by haklesup
Tue Aug 14, 2018 11:32 am
Forum: General Discussion
Topic: i need a long QR type code identified
Replies: 16
Views: 507

Re: i need a long QR type code identified

Likely because it is proprietary and contains payment information (the value of the postage) they probably don't want anyone tampering or learning how to make free stamps. If that is the case, no public app will have access to the database the code points to.
by haklesup
Thu Aug 09, 2018 12:03 pm
Forum: General Discussion
Topic: Beheaded fatty nail as soldering tip...
Replies: 21
Views: 989

Re: Beheaded fatty nail as soldering tip...

(from wiki) Above1700 °C (1973 K /3583 °F) in vacuum or oxygen-free atmosphere, diamond converts to graphite; in air, transformation starts at ~700 °C. Diamond's ignition point is 720–800 °C in oxygen and 850–1000 °C in air I think of those folks rummaging through ash in the CA wildfires and finding...
by haklesup
Tue Aug 07, 2018 3:58 pm
Forum: General Discussion
Topic: Beheaded fatty nail as soldering tip...
Replies: 21
Views: 989

Re: Beheaded fatty nail as soldering tip...

"Reminds me of when cutting steel with a diamond impregnated circular saw blade. The diamond tends to dissolve" Probably due to overheating or advancing too fast. When using diamond to cut anything the key is slow and cool. While a diamond is very hard, they can be burned at a lower temp than the me...
by haklesup
Fri Aug 03, 2018 11:29 am
Forum: General Discussion
Topic: wireless door button - several failed.
Replies: 17
Views: 845

Re: wireless door button - several failed.

in almost all cases this is a bare die epoxied to the PCB then gold bond wires ultrasonically welded to the die and PCB pad then covered with a "Glob" of epoxy. Its pretty close to a packaged device technology but is even lower cost for high volume products. For more most chips, they almost always c...
by haklesup
Wed Aug 01, 2018 1:13 pm
Forum: General Discussion
Topic: wireless door button - several failed.
Replies: 17
Views: 845

Re: wireless door button - several failed.

I hear the complaints about buttons. For new projects with uControllers, there is lots of support for capacitive touch keypads, sliders and other button configurations on ebay and other places to get modules. No need to use mechanical buttons if you are determined. Unlikly any would eb compatible to...
by haklesup
Tue Jul 10, 2018 3:11 pm
Forum: General Discussion
Topic: Line Array - Anyone have experience?
Replies: 11
Views: 563

Re: Line Array - Anyone have experience?

Interesting but I don't get why. Does it have a special sound quality? I can see if you drove each one separately with some kind of DSP you could probably do some interesting stuff but if all driven from the same source, in phase I wonder how it's sound differs from a typical enclosure with similar ...
by haklesup
Tue Jun 26, 2018 10:45 am
Forum: General Discussion
Topic: Experimenting with Hot Glue..
Replies: 103
Views: 18495

Re: Experimenting with Hot Glue..

I wonder if the Silicone II would have worked better. In any case, there are spray on Silicone conformal coating products if you really needed that kind of protection. In most cases a urethane conformal coat is sufficient and is removable with acetone. Most modern parts can survive acetone but I wou...
by haklesup
Thu Jun 21, 2018 12:19 pm
Forum: General Discussion
Topic: To evaluate performance of used 18650 cells...
Replies: 22
Views: 3134

Re: To evaluate performance of used 18650 cells...

If you can find a clock that you can start and stop with a control line, then it would not be too hard to make a 0.9V level detector with an op amp and stop the clock when the threshold is reached. Some MultiMeters had DataAcquisition ports and software, you can use like a datalogger. this was the c...
by haklesup
Mon Jun 18, 2018 3:30 pm
Forum: General Discussion
Topic: To evaluate performance of used 18650 cells...
Replies: 22
Views: 3134

Re: To evaluate performance of used 18650 cells...

I noticed that Max discharge current is the other primary specification used for selection. Naturally you would want a high discharge current for say a super flashlight but lower discharge and a little more capacity for something like a low power toy. How do you suppose one would measure that spec. ...
by haklesup
Mon Jun 18, 2018 1:15 pm
Forum: General Discussion
Topic: What to do with Heathkit stuff?
Replies: 1
Views: 1090

Re: What to do with Heathkit stuff?

Unless you are an Analog purest I think the Tubes should be ignored though it does give insight into how bipolar transistors work. As for the heathkit stuff, they are probably quite old and built with average quality components from the 60 to the 80s so they are probably going to have poor tolerance...