Tag Archive for: Technology

TI-55 Calculator

TI-55 Calculator Battery Replacement


How I made my TI-55 calculator work. THE THING HAS AN LED BUBBLE DISPLAY.

Want to breath new life into an old calculator? The TI-55 was one of the best in the line of scientific calculators with statistical capabilities back in the 70’s.

The TI-55 has an LED-stick using LED chips mounted and bonded to the printed circuit board, and has some 12-digits instead of the 9-digits of other calculators from the same time period.

The TI-55 calculator used a rechargeable battery pack rather than using a 9V battery, so when the rechargeable no longer worked, your battery was dead. However, the voltage and current used in the rechargeable works out to be still, 9V capable, so this video shows how one can easily adapt the TI-55 for use with a standard 9V battery.

Dell AT-101W "Big Foot" Keyboard Cleaning

Dell AT-101W “Big Foot” Keyboard Cleaning

Cleaning out my first mechanical keyboard! Picked it up for dirt cheap! A Dell AT-101W, or “Big Foot”
This is a very old video.


Medical Grade OpticalIsolator

Medical Grade Optical Isolator

Tale of a thrift journey finding some interesting medical equipment, and a teardown of a medical grade opto-iso. Made in Canada!

555 Toy Organ

Fun With 555 Toy Organ Circuit

Just messing around with a 556 (two 555 timers in one) to make a crude synth. Rather old video.

SR600 Cash Register

Glory SR600 Cash Register Teardown

Glory SR600 Cash Register. Was gonna just show it off, but it doesn’t work, so teardown!

The Bulging Battery That Smelled of Fruit

The Bulging Battery That Smelled of Fruit

Puncturing a battery is dangerous. Especially if it smells like fruit.

VCR Rechargeable Flashlight

Use for a VCR – Rechargeable Flashlight!

A use for VCRs! Homemade rechargeable flashlight! Something you could do at home!

Pile 9V Battery On Oscilloscope

Pile 9V Battery on Oscilloscope with Mini Teardown


Watch the voltage output of a fried super cheap 9V battery on an oscilloscope. And then it’s torn to pieces for fun.

GameCube Teardown No Special Tools!

GameCube Teardown No Special Tools!

Teardown of a GameCube with no specials tools!? HOW?! Well you can just use the extension on a hex based screwdriver bit kit. Good broad look of a GameCube, and some of it’s odd and wonderful parts!

Tiny Capacitor Bank, Tiny Coilgun, Lots of SPARKS!

Tiny Capacitor Bank, Tiny Coilgun, Lots of SPARKS!

Coilgun with tiny capacitor bank, and tons of gratuitous sparks just for fun! And an LED pop!

Was distracted while messing around with inductors, then made a coil gun, followed by a box that can charge a bank of capacitors up to 30V and then dump it into something with the flip of a switch.