FrostBite IoT dev board

Sundelin & Kouri Engineering Ltd launched a completely new C++-based platform and development board for accelerated IoT and embedded development called FrostBite. The new board, Frostbite, is based on Nordic’s nRF52840 SoC silicon, featuring powerful 64MHz ARM Cortex M4F CPU, 256K of RAM and 1M of on-chip flash memory, on-chip soft radio for multitude of

PoE tester teardown

Here is teardown of one cheap power over Ethernet tester from eBay. It worked OK and did what it promised. It came with instructions that seem to be for a slightly different model witg more features. What is inside Circuit details. It has two sensing circuits: for end span and middle span power. I have

Arduino black ABS case

There are many different cases for Arduino.  Black ABS Protective Case For Arduino UNO R3 is an interesting plastic case for Arduino. The interesting feature in it is that it is designed to be compatible with LEGO blocks. It means that the case can be easily used in LEGO building projects. This is a reasonably

Transistor tester M12864 advanced version

I have earlier tested basic DIY Electronics Tester Kit M168 and more advanced Component tester M12864. Now it is time to test the next improved version of the same idea: Original Hiland DIY M12864 Graphics Version LCR ESR PWM Transistor Tester Kit (was on sale for less than 10 Euros) This kit has same display

Arduino UNO transparent case

I wanted to have a protective case for Arduino. I got this cheap (less than $2) Transparent Acrylic Shell Box For Arduino UNO R3 Module Board. Everything was packages to this small plastic bag. After installing eight screws and protective films from the plastic parts, everything was ready. I must admit that it takes some

Radar motion detector

I needed a motion detector for Arduino. I saw a cheap Microwave Radar Induction Switch Human Motion Sensor Module at DX (similar also available at Banggood at pack of 5). It advertises High Sensitivity for Arduino, Long Sensing Distance, Wide Sensing Angle for Detecting Moving Objects. Using this is a microwave sensor module that specifically

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

Metal detector kit converted to Arduino sensor

I got a cheap DIY Metal Measure Kit Electronic DIY Soldering Exercise Board with the following specifications: Model: MDS-60 Working voltage: DC3-5V Standby current: ≤ 5mA Working current: ≤40mA Measure depth: ≤ 60 mm Measure alarm mode: sound, light PCB size: 86 x 61mm There was a just the circuit board and some components on

Fiber visual fault locator videos

Last year I made a posting on Cheap fiber optic visual fault locator. It told about 1mW 5KM Red Light Pen Visual Fault Locator Fiber Optic Laser Cable Tester Meter puts out highly visible red light into a fiber optic cable that has ST, SC and FC optical connectors.The universal fiber connector worked well with single-mode

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