I bought this VGA signal generator module years ago from some web shop in China. It is designed to easily test your VGA monitor(s) (VGA/SVGA/XGA) with this handy tool. It can be also used as a general purpose video signal source when testing other video equipment that take in VGA signal (like video switchers, converters, →
The Acer Nitro 5 is a budget gaming laptop. This model was just around 4 years old. This computer was hit with two problems: the computer does not turn on and the screen hinge was broken. Open the laptop by removing the bottom of the computer. It had many small screws that I had to →
The HP Envy (stylized as HP ENVY) is a line of consumer-oriented high-end laptops, desktop computers and printers manufactured and sold by HP Inc. They started as a high-end version of the HP Pavilion line. I have had a HP ENCY 17 laptop for many years. It has worked well. But just some days ago →
I got an old HP mixed signal oscilloscope HP54645D. This is over 20 years old test instrument with 7″ CRT display. The 54645D is a 100 MHz, 2+16 channel Mixed Signal Oscilloscope from Agilent. Measure voltage or current signals over time in an electronic circuit or component to display amplitude, frequency, rise time, etc. Applications →
The Tektronix 2235 is a 100 MHz dual-trace, dual-timebase portable scope. Tektronix 2235 has two channels and delayed sweep. This is still a pretty decent analogue oscilloscope (if you are looking for an analogue oscilloscope) with Large, Bright CRT screen. This oscilloscope has the U shaped handle that has detents which allow it to double →
I started to have paper jamming problems on my old HP Laserjet 1200n printer. It is a printer model released in around 2001. The HP 1200 printer has both parallel and USB ports, the N version comes with Ethernet network adapter box that plugs to USB port. The native control language is PCL 5 and →
Batteries are one of the most widely used sources of energy in portable electronic devices. Those batteries can leak when they’re left to devices for too long or disposed of improperly. Battery leakage is annoying and usually damages your equipment. Here Duraleak strike again… Why do batteries leak? Under normal conditions, the chemicals inside a →
I got few years ago this cheap USB powered mosquito trap. The idea in it is that Blue/UV light gets the mosquitos to go near the device, and then the device sucks them away. This product was cheap, but was not very effective. When I tried this device this summer, it did not seem to →
In jet printer is affordable, versatile and great at printing photos and graphics. But they have also set of problems. Troubleshooting common inkjet printer problems needs to be done too often. The most common problem with inkjet printers is not printing at all, poor print quality and the ink being very expensive. Usually print quality →
Very many battery packs are built using standard size cells inside the plastic package. When cells go bad, it is often possible to replace the cells with new one either as DIY project or have some repair company to do that. Usually my option one is to find replacement battery for devices, and if it →