Cheap eBay LED tester fixed

Found this from eBay for about 2 dollars: New Mini Handy 2~150mA LED Tester Test Box for Light-emitting Diode Bulb Lamp Description: 100% brand new and high quality Material: Plastic Color: White Handy device for testing LED’s. Simply plug your LED into the correct holes (all of which are marked) and push the button to

Helvar TS300 dimmer teardown

Helvar TS300 light dimmer is designed to dim incandescent light bulbs that are powered from 220-230V 50Hz AC power source. It is designed to be installed to wall in place of light switch. This is an old device that might not have been sold for ages. Once this type of dimmer was quite common on

Failed car USB charger teardown

Here is teardown of one cheap car USB charger. It failed after few years of use. Outside Inside Electronics As you can see the fail was in soldering that connected two circuit boards. The fail had ripped of solder pads from circuit board. The soldering quality on some other places also questionable. There is simple

Samsung Galaxy S9+ and S9 Teardowns

Is Samsung Galaxy S9+ the fanciest Android phone at the moment? Only teardown will tell if this phone is a true contender, or just a weird AR Emoji machine. Read Samsung Galaxy S9+ Teardown by iFixit: two blades for changing aperture versus the usual five on normal cameras; battery, iris scanner, front cam are basically

Motor protector teardown

Here is GE MT03M motor protector: Contactor, Miniature, Overload Relay, 5.5-8.0A Range • Control circuit up to 690V • Power circuit up to 690V • Three-pole differential (phase unbalance protection) • Automatic ambient temperature compensation between – 25ºC and + 60ºC • Choice of manual or automatic reset • Direct connection to contactor or independent

Digital Voltmeter AC 20-500V

I wanted to add an AC voltage meter to my electronics lab variac transformer output (0-275V AC). I decided to get a cheap Machifit AD16-22V 22mm Digital AC Voltmeter AC 20-500V Voltage Meter Gauge Digital Display Indicator with the following Specification: Model AD16-22V Mounting hole 22mm Voltage AC 20-500V Class of safety protection IP65 Color

LED Energie LED bulb teardown

LED Energie brand LED bulb with following data stopped to work properly: 230V 50Hz 7W E27 450lm 3000K 60mA 20D 3684 Mod.5161 So lets make a tear-down Inside There seems to be 20 small LEDs in series inside bulb and one of them burned black. As such this LED string is expected to need around