ePanorama.net

All about electronics and circuit design

DT830 multimeters

Saw in Facebook discussionhttps://www.facebook.com/groups/electronichobycircuits/permalink/3657982357559780/ https://www.facebook.com/438304376511718/posts/1304575383217942/ Another meter is fried again today!!! I have six meters blown in 2 years, while reading high voltage AC. I guess I will find a better alternative for such reading. Is there a way of fixing spoilt meters!?. We are talking about this kind of DT830 type multimeters: My answer:

Friday Fun: Turing Tests

The Turing Test is a test designed to test a machine’s ability to think. A human submits questions to the machine, and it answers (usually in written form). If the person cannot distinguish between it, and a person answering, the machine is said to be intelligent. Turing himself never claimed this would test whether the

ETSI IoT security standard

Security standard for consumer IoT emerges. ETSI approved and published its standard ETSI EN 303 645 V2.1.1 (2020-06) – Cyber Security for Consumer Internet of Things: Baseline Requirements in June 2020. This puts it on track for final approval and release later this year. The standard specifies the high-level security and data protection provisions that

NanoVNA RF Demo kit

Got RF test kit to play with NanoVNA from Banggood: RF Demo Kit NanoVNA RF Tester Board Filter Attenuator for NanoVNA-F Vector Network Anaylzer. I selected this RF Demo Kit NanoVNA over another quite similar RF demo kit because this kit was cheaper and looked better. This RF Demo Kit is specially designed for RF

Cyber Security News October 2020

This posting is here to collect cyber security news October 2020. I post links to security vulnerability news with short descriptions to comments section of this article. If you are interested in cyber security trends, read my Cyber security trends 2020 posting. You are also free to post related links to comments.

Windows 10 fixes for 100% disk usage

My computer feels slow even though I have enoug memory and powerful CPU. Got 100% disk usage in Windows 10? So your computer is hanging and freezing because of it. You want to fix this vexing Windows issue. The following article gives several potential fixes! It promises to solve the issue with 15 tricks list.

Windows source code leaked?

Those sources seem toi indicate that some older Microsoft Windows versions seem to have gone “open source” without proper license… Microsoft’s source code for Windows XP and Windows Server 2003 has reported to be leaked online. Torrent files for both operating systems’ source code have been published on various file sharing sites this week. 43GB

Linear power supply rectifier designer

LINEAR POWER SUPPLY DESIGN ASSISTANT #1 at https://www.changpuak.ch/electronics/power_supply_design.php is a tool for designing and simulating linear power supply rectification and smoothing capacitors See the circuit diagram. Enter the design data and can see the output voltage ripple and current on circuit. You can try with different capacitor values, different loads and different transformers. This is

Night light teardown

Here is a teardown of cheap mains powered LED night light from LIDL. After few years of use this light became very dim and so useless. I opened it to see what is in it and what was broken. Let’s open it. Circuit board details Here is the circuit diagram. This is quite typical transformerless