Performing A Chip Transplant

Hackaday posting article Performing A Chip Transplant To Resurrect A Dead Board describes a situation where  the only option was to try to fix a device, which in the end involved a delicate chip transplant. The board was the Pixl.js, an LCD board with the nRF52832 SoC with its ARM Cortex M4, RAM, flash, and Bluetooth

Potato chip to TDR circuit

A time-domain reflectometer (TDR) is an electronic instrument that uses time-domain reflectometry to characterize and locate faults in metallic cables. I designed a TDR circuit many years ago for easy cable testing with oscilloscope: That circuit was also turned to an electronics kit that is sold by Far Circuits. When getting the original 74AC14 seemed

Oscilloscope with Arduino tutorials

Oscilloscope and Arduino are tools for modern makers. Here are some videos and articles that combine together Arduino and oscilloscopes: Learn Oscilloscope Basics with an Arduino Uno | AddOhms #28 Using an Oscilloscope and an Arduino Improve your Arduino programming skills – The budget oscilloscope. For more details, read the following articles: Learn Six Oscilloscope

Make simple fixtures from SMA connectors | EDN For testing SMD components you need some test fixture. A fixed-geometry fixture produces consistent and repeatable results. This article tells how you can easily make fixed-geometry fixtures out of PCB-mounted SMA connectors. You can build a fixture to measure bypass capacitors using SMA-female edge-mount connectors. The narrow-base connectors (5 mm grid) and are best

PoE powered device PSU

With PoE (Power over Ethernet) technology, an Ethernet cable can carry power in addition to data. PoE can supply operating voltage to PoE compatible networked devices, such as a WLAN base station, an IP camera, a VOIP phone or IoT device. The original IEEE 802.3af-2003 PoE standard provides up to 15.4 W of DC power

Hakko 191 soldering iron meter

I got this “Hakko 191″ soldering iron temperature meter from Banggood some years ago. It is not available there but you could find similar devices from eBay etc.. According to Hakko official pages the model 191 TIP THERMOMETER has been discontinued maybe years ago. This is most probably some Chinese clone of the device because

SMD soldering videos

SMD stands for Surface Mount Device and they are components that you solder on the surface of a circuit board.Soldering them is somewhat different from soldering “traditional” through hole mounted components. There are many SMD soldering tutorials, for example How To Do SMD Soldering Using a Soldering Iron and Sparkfun Surface Mount Soldering Tutorials. Youtube

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

Cheap USB soldering iron tested

I have earlier written about USB soldering iron and DIY USB soldering iron. The question is that how useful they are because of the limited power available from USB port (just few watts). The maximum power you can get from normal USB 2.0 port is only 2.5W (5V 500mA), but some special “charge” USB ports