Skip to content

Experimental Engineering

  • The Engineer
    • The Tools
    • The Shack
    • OpenPGP Public Key
    • Contact The Engineer
  • Circuit Simulator
  • Project List
  • Photo Albums
    • Whitby Camping Trip – August 2020
    • Electric Glassware Collection
    • Glasgow Transport Museum 2018
    • Astle Park Steam Rally 2017
    • Anson Engine Museum 29-08-16
    • Download Festival Photo Albums
      • Download Festival 2009
      • Download Festival 2010
      • Download Festival 2011
      • Download Festival 2014
      • Download Festival 2015
      • Download Festival 2016
      • Download Festival 2017
        • Demolition Download IV
      • Download Festival 2018
        • Demolition Download V
        • Lords Of Lightning
        • Circus Of Horrors
      • Download Festival 2019
      • Download Festival 2020
      • Download Festival 2022

Tag: protection circuit

Cat Links Consumer Gear, Hacks, Personal Project

Maplin 3W LED Torch Charger Fail

Posted on October 7, 2015 The Engineer

A member of the family recently bought one of these torches from Maplin electronics, and the included chargers for the 18650 lithium-ion cells leave a lot to be desired. Here’s what’s supplied. The torch itself is OK – very bright, and a good size. Me being cynical of overpriced Chinese

Continue readingMaplin 3W LED Torch Charger Fail

Cat Links Lasers, Personal Project

1.5W 445nm Lab Laser

Posted on January 25, 2013 The Engineer

Here is a followup from the 1.5W laser module post. The module has been fitted into a housing, with a 2.2Ah Li-Poly battery pack. Charging is accomplished with an external 12.6v DC power supply. Above can be seen the pair of switches on the top, the keyswitch must be enabled

Continue reading1.5W 445nm Lab Laser

Cat Links Consumer Gear

Nokia 7110

Posted on August 26, 2010 The Engineer

Another phone from the mid 90s. This is the nokia 7110. Here the slider is open showing the keypad. Here the battery is removed, a Li-Ion unit. The battery cell & protection circuit removed from the casing. This is the rear of the PCB removed from the housing. Data &

Continue readingNokia 7110

Tip Jar

If you’ve found my content useful, please consider leaving a donation by clicking the Tip Jar below!
All collected funds go towards new content & the costs of keeping the server online.

  • Electronic Calculators
  • Ohm’s Law Calculator
  • Grid Square Locator
  • Crimp Connector Types

Blogroll

  • Arduino ccTalk Tutorials
  • Distant Signal Radio
  • Skippy's Random Ramblings

Hardware Interfacing

  • Arduino ccTalk Tutorials

Archives

  • Helium Neon Lasers
    • He-Ne Lasers – Introduction
    • Applications of a 1mW Helium-Neon Laser
    • He-Ne Laser Safety
      • Laser Safety Classifications
    • Theory of Operation, Modes, Coherence Length
    • He-Ne Laser Tubes, Heads, Structure, Power Requirements, Lifetime
    • Power Requirements for He-Ne Lasers
      • Modular He-Ne Laser Power Supply
    • Wavelengths, Beam Characteristics
    • Magnets in High Power or Precision He-Ne Laser Heads
    • Internal Mirror He-Ne Tubes up to 35 mW – Red and Other Colours
    • Viewing Spectral Lines in Discharge, Other Colours in Output
    • Demonstration He-Ne Lasers, Weatherproofing
    • Interesting, Strange, and Unidentified He-Ne Lasers

Recent Posts

  • HP Pavilion x360 14-dy0518sa – Linux Experience
  • FieldBest I Optical Power Meter Teardown
  • Brsk Updates – A New Network Link
  • Melles-Griot 05-LHR-088 Helium-Neon Laser
  • Infrastructure Updates & The Cost Of Living
Copyright © 2022 Experimental Engineering | Signify Dark by WEN Themes
Scroll Up