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Computers + Electronics + Internet + Science + Technology

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Best MP3 Player

Lately I have been looking for an MP3 player that would accept mini-SD (TF) cards or USB flash drive memory so I can listen to my extensive music and audio library. There are hundreds of models available in every price range. What I wanted was a player to play music without headphones.

What I settled for is an excellent portable MP3 Player / FM Radio combo. This player plays audio through a speaker or using an earphone.   Speaker function is combined channel mono but the audio out jack for headphone or external speakers is stereo. The internal lithium battery charges in about three hours, giving the unit three to eight hours of playing time. Playing time depends on speaker loudness; the player can get very loud.

The model number is L-218.

It's available through Amazon, eBay and a few other dealers.   The price range is $15 to $40 per unit!


Features (from Manufacturer):
–Can play MP3 music from TF card or USB flash drive(Max 16G), selectable;
–With FM radio, radio can automatically scan and memory channels;
–With audio line in jack, using micro USB-3.5mm audio cable, you can easily connect to other audio devices such as computer, MP3, MP4, mobile phones,iphones, PSP, stereo system, etc;
–Uses a rechargeable BL-5C Lithium battery, charges by connecting USB cable to computer or USB power adapter, or by universal charger,   NOTE:  NO data connection, only power connection here.
–With standard 3.5mm earphone jack, available for earphones to listen to radio and music;
–Available to select radio channels and MP3 music with 0-9 number buttons. It is user-friendly;
–MP3 repeating and looping function, can control to loop the current ONE/FOLD/ALL MP3 music;
–In MP3 mode, when powering off, plays back the current MP3 when powering up next time;
–This speaker is very mini portable and light, the thickness is only 2CM, really very easy to carry;
–It uses a special ultra thin bass speaker, which enables it to have a much better high-range and bass HIFI sound, which can not be solved if a normal quality thin speaker is used;
–With large LED colors flashing display screen;
–With LED flashlight;
–Made of ABS plastic(UV shell).

Christmas is around the corner.



I will be attending a WordPress Meetup in New Orleans on the evening of June 28.   It should be interesting and I will let everyone know. Meetup


Neat Technical Website



First Hard Drive

This is my first hard drive I bought, in 1986.
It is an ST-4096 Seagate EIGHTY MEGABYTE capacity hard drive.
A six and a half pound beast! Perfect for storing stuff downloaded from computer bulletin boards at 2400 baud.ST-4096

$950 !! That was cheap at the time, about $12 per Megabyte.


H500 Trans-Oceanic

This is a picture of the first radio I ever got (1964). My boss, Mr Cangelosi said if I could repair it, it was mine. I surprised him by getting two of the bands working right away. Still, there was hum in the power supply when run on AC. I couldn’t afford the battery for it.
I left it at the shop and it was one of the items that got trashed when the shop closed.

[The battery]


Radioactive delights …

Do you know what this is?


This is a replacement Coleman Lantern mantel; replaced when the old one gets damaged or burnt out.   I didn't use them for that purpose.

The mantel exhibits a peculiar property in that it is slightly radioactive. Because high radioactive sources were tightly controlled and inventoried in my work I needed a quick OP/NO-OP method for checking radiation monitors such as a Gamma-Ray tool. Potting two of these together and placing them near the GR detector would quickly tell me that it worked by registering the counts. Also, the same potted mantels would sub for a source to troubleshoot Geiger-Mueller bundles.

In any case the mantels were NOT for calibration; test sources were used for that and those were tightly controlled.

Another "source" that oil well logging companies use is sand.   Not just any sand but sand gathered from the beaches of Guarapari, Brazil and potted in a flexible blanket.


Beginnings …..

My start in electronics, as a Radio-TV Repairman's helper, in 1963.

ACME Radio and TV
127 N Carrollton Avenue
New Orleans 19, Louisiana

My boss and the owner of the shop was Victor Cangelosi, a fantastic guy. He needed a helper to carry TVs to and from customers' homes. My pay wasn't much, I believe it was about $15 per week during school year, increased to $20 summer. That wasn't much money but the benefits were great; I was learning electronics.

Not only did he pay me but he also gave me some of his test equipment such as a VTVM and a Hickok O-Scope. My text books were SAMS Photofacs, Riders Radio Manuals and the reference bible of consumer electronics, the RCA Tube Manual.
As I gained more knowledge Mr Cangelosi let me repair some radios, especially the FIVE TUBE types. Those are super easy to fix.

Everything came to a crashing end during Christmas vacation 1964. I was sick, laid up in bed and during that time Mr Cangelosi had a fatal heart attack. Three days passed and his son had a junk man clean up the shop and the adjoining house where hundreds of classic and antique radios were stored. The shop was cleared to the bare walls. My test equipment and my school science project got trashed! Customers' sets gone! We didn't have tags on individual sets as those got ripped off; the ID on customer sets were coded labels with an index in a book.

I tried to recover some of the "junk" but the bulldozers at the Almonaster dump already crushed it all.

Brilliant son, don't you think? He was a History Professor.
Science Project for school – ruined, with no time to re-do.



Fujitsu Lifebook T730

Fujitsu Lifebook


[Check it out!]
Fujitsu T730 with
i5 Processors go for around $175 on eBay.

Why so low?   Because Fujitsu isn't a popular brand like ASUS, Dell, HP or Lenovo.  But they are very fast and highly expandable notebook computers.

My First Fujitsu

  • 3 Gigabytes RAM
  • 1TB main hard drive (C:\)
  • Stylus for touch screen
  • HDMI output
  • 3 USB2 receptacles
  • SD Card reader
  • Stylus
  • Windows 7 Pro – 32Bit

My Second Fujitsu

  • 8 Gigabytes RAM
  • 1TB main hard drive (C:\)
  • 2TB Data Drive (L:\ and M:\, one Terabyte each) Expansion Slot
  • HDMI output
  • 3 USB2 receptacles + 2 USB3 on PCI Express lot
  • SD Card reader
  • Webcam
  • Windows 10 – 64Bit

For BOTH Computers

      The drive bay (Expansion Slot) is easily removable with a side lever so any of the following can be inserted into that drive slot:

  • Removable CD/DVD drive
  • Second Battery
  • Ubuntu Hard Drive
  • Windows Xp Hard Drive (32Bit)
  • Solid State Drive (SSD)


Using both laptops makes it very easy to maintain my sites. Contact me if you want one like these. They're great laptop computers. These were originally $2000 laptops!


MIT Online Classes

Online college courses. 

No need to leave your home to attend classes!


MIT Online Courses




Electronic Hobbyists – What happened to them?

Electronics used to be one of the greatest hobbies ever. There were literally hundreds of thousands, maybe even millions, of people who used to play around with electronics as an avocation or part-time interest and activity. There were at least a dozen magazines supporting this group and plenty of parts and kits suppliers to keep them happy.   Kids learned electricity and electronics in school. As a result, when they ended up getting the bug, they ended up not only adopting electronics as a hobby, but also made it into a career. You don’t see too much of that going on anymore.   So what the devil happened to the electronic hobbyist?

I started playing around with old radios in junior high and got interested in ham radio.    I built the classic crystal radio and ……………

Read the rest of the article at the source

By Louis E. Frenzel

March 05, 2007
Electronic Design Magazine

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