I accidentially killed my favorite multimeter that had served me well for a long time. I was verifying another multimeter by comparing it’s reading to measurement made by this meter (that was checked to be accurate with a calibrator in 2020). My meter just went dead. New battery did not help. Any repair tips or →
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 →
They are heavy (because of their iron core) and can be very large. The power transformers are design to operate best with an almost constant load which is equal to their rating. The maximum efficiency being designed to be at full load. Actually, all the transformers are the same that is same design formulae apply →
MT87 Digital Clamp Meter is the cheapest digital clamp multimeter I have found. It has been sold at price for less than 10 Euros/Dollars, while some other places sell the same mater often at around 20-30 Euros price. Main Features: ● Mini and compact design, easy to hold ● Data hold and LCD display, easy →
Needed adjustable resistor for electronics lab. I found 0-9999 Ohm Simple Resistance Box Precision Variable Decade Resistor Teaching Instrument Measurement & Analysis Instruments from Tools on banggood for sale one day on the app. Specifications: 100% brand new and high quality Attenuation Range / Mini Step: 0 to 9999ohm, 1 ohm step Shell material: Plastic →
Ethernet over twisted-pair technologies use twisted-pair cables for the physical layer of an Ethernet computer network. Most commonly standards use 8P8C modular connectors (often called RJ-45), and supported cable standards range from Category 3 to Category 8. These cables typically have four pairs of wires for each connection, slower standards (10M and 100M) used only →
Who invented that and decided that it was a good idea to start to use this 10 pin RJ-45 look-alike connector? I wanted to do measurement with multimeter on UTP wiring, took a cable (left) that looked like RJ-45, but nothing worked as planned with it. Ended up butchering a real CAT6 cable (on right) →
This article is about measuring resistance, capacitance and inductance. The measurements described here talks about measuring components that not wired into any circuit. Resistors, Inductors and Capacitors are the most commonly used passive components in almost every electronics circuit. Out of these three the value of resistors and capacitors are commonly marked on top of →
I bought a Lutron LCR-9063 meter long time ago (expect around 20 years or more) to be able to measure value of coils and capacitors. I has worked well for me. What looks like the same meter are sold as VOLTCRAFT LCR-9063 Component tester. This meter is designed for measuring resistance, inductance and capacitance. LCR-9063 →
Sometimes there are needs to measure mains voltages with oscilloscope. You must be very careful when measuring voltages on the mains with any measurement instrument. The mains voltages are absolutely deadly. Measuring mains voltages with multimeter can be dangerous. Trying to do the measurement of mains voltage with oscilloscope is potentially more dangerous, because typically →