Circuit breaker teardown

Here is teardown of 10 A DIN rail mounted miniature circuit breaker (Biltema brand) What you see when you open the case Turn around – circuit open/off/tripped Device reseted to “on” position On the left side of mechanism there is bimetallic overcurrent triggering mechanism – load current goes through bimetallic strip and heats it.  On

Motor protector teardown

Electrical motors need protection devices. EATON Moeller PKZM0-0.63 is a Motor Protective Circuit Breaker with manually actuated motor-protective circuit-breaker IEC/EN 60947-4-1, VDE 0660 part 102, rotating handle with clear switch position display ON and OFF. The current rating of this AC motor protection device can be adjusted from 0.4A to 0.63A. In addition to thermal

HASP software protection “dongle” teardown

Here is view what is inside this old HASP software protection “dongle” that was designed to be plugged between PC Centronics printer port and printer. This is outdated technology because PCs have not had printer ports for many years. Inside views: Closeups shows that the main IC seems to be a custom made part for

Netgem N7700 STB teardown

Elisa Viihde is a IPTV service sold by Finnish telecom operator Elisa. The system works so that you have a set-top-box that connect to your cable TV and your Internet connection. You can use the set-top-box to view both live cable TV signal, your recorded TV programs from IPTV video recorder (in “cloud”), pay TV

Gas station runs Windows

What is technology inside gas station where you just put in credit card and fill the tank yourself. I has already taken a look at one Verifone payment terminal on what software it runs (it runs Linux). Today I got a view of what is technology used on similar device made by Dresser Wayne AB.

Soldering iron videos

I have earlier posted about soldering irons. Here is a continuation to it with a set of interesting soldering iron tear-down and DIY videos from YouTube. Inside the cheapest soldering iron on ebay. How To Make a MINI USB Power Soldering Iron Hot! Hot! Hot! Weller ROBUST Soldering Gun, BEB #21 Homemade Soldering Gun How

iPhone 8 teardowns

iFixit Teardown Gives First Look at iPhone 8′s Guts. View IFixit iPhone 8 Teardown to  find out if Apple’s playing a game of mere numerical catch-up to Samsung’s Galaxy S8 line, or if glass backing and wireless charging warrants skipping ahead a grade. iFixit’s iPhone 8 teardown shows that you really don’t want to crack

Keyboard teardown

Why do cheap key feel so bad when typing. Let’s take a tear-down of one HP keyboard. Let’s open it Rubber makes the “keyboard bad feel”. I remenber rubber keyboard feel from Sinclair Spectrum (at 1983)… Flexible circuit board material is used for switches Circuit board Not much to see on the other side of