April, 9 years old and Alfred, 5 years old assemble and solder a LED blinking Christmas tree. Kids love to build stuff and electronics should be no exception to them! They build a 3D blinking LED Christmas tree. It only uses LEDs, resistors, capacitors and transistors, to blink the LEDs in 3 groups. The LEDs […]
Electronics For Kids – LED Christmas Tree Read More »
Test, teardown and comparison of two DLP projectors. The Vivitek WD755 is from around 2013 and the older InFocus is from around 1998. They are both based on the Texas Instruments DLP chipsets and the technology and space it takes up, shows that there is little difference in the physical size, but the higher resolutions
Teardown of DLP Projectors With 15 Years Between Them Read More »
This is a short walk-through on deuterium UV lamp theory and a test of the lamp in operation from its rather special power supply. PSU failed. Lamp failed. Complete fail. The lamp comes from the teardown of a Hitachi L7450 HPLC Diode-Array-Detector. HPLC is short for High Performance Liquid Chromatography. The DAD uses UV light
Hitachi 890-2430 Deuterium UV Lamp Test and Theory Read More »
Teardown and on-the-fly analysis of the circuits found inside a Kappa CF15 CCD camera. I got the camera with my Nikon SMZ-2T stereo microscope, that I use for electronics repairs and component identification. The camera was defective and taking it apart really made for a pleasant surprise of complexity and a stuffed enclosure! You might
Teardown of a Kappa CF15 CCD Camera From a Microscope Read More »
Cable TV Networks This Cisco headend/hub RF combining and splitting networks is used in Hybrid Fiber-Coaxial networks. HFC is a telecommunications industry term for a broadband network that combines optical fiber and coaxial cable. Advanced HFC networks include numerous 2-way interactive services that have changed the requirements for the configuration and flexibility of the systems.
Cisco 9900 Series 50-1000MHz RF Signal Splitter Teardown Read More »
I found a discarded street light head at a scrap yard and wanted to give it a new life instead of being shredded. Re-use, re-purpose or re-invent. Do not just throw out stuff, see if you can use it in another way. The Earth Overshoot Day is something to take seriously. https://www.overshootday.org/ The original lamp
DIY 30W LED Work Lamp From a Discarded Street Light Read More »
Teardown of some old and discarded DVB MPEG-2 Decoders that have been used in a large buildings distributed TV network. Despite that units look the same on the outside, they turned out to be very different hardware revisions on the inside. The front of the Tandberg unit only has a display and 4 input keys.
Tandberg TT1200 DVB MPEG-2 Decoder Teardown Read More »
