This guy has the same problem as I have: the screen is scrambled in some places – top and bottom.
Archive for the ‘Meters and Test Equipment’ Category:
2025-03-28 Measuring And Minimising Transistor Switching Loss – Double Pulse Testing
Here’s a 17 min. video describing the above in the title. It’s technical and somewhat complicated but calculates the power dissopated during switching. There are a lot of important details, such as the value of the gate resistor. I think I need to do a lot more studying about this topic.
2025-02-27 Egyptians Used Copper Tools To Cut Stone
This is how the Egyptians used copper tools to cut the stone blocks. https://www.facebook.com/reel/615624941183863/?mibextid=9drbnH&s=yWDuG2&fs=e
2024-09-20 Simple 1 Digit Counter, IR Beam Break
This short uses a CD4026, a 7 segment display, 9V battery, some resistors, an IR LED and a CdS photocell or phototransistor. Break the IR beam and the display advances to the next digit. https://www.facebook.com/reel/525596709839365?mibextid=9drbnH
2024-03-30 MX20T Link Switch Port Tester
A long time ago when we were going to Cat5 UTP, I had a lot of these MX20Ts left over. So I made up a 15 pin plug with the negative 9VDC on pin 6 and positive on pin 13, and soldered the wires to the battery contacts. I taped the battery to the back
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2024-02-21 Website for Electronics – Very Comprehensive
This very comprehensive electronics website has many projects with useful devices. This example project is a transistor curve tracer. Go to the index and look at the many, many links. It seems to be at the ETH in Switzerland but some of the words are in ?Thai? https://www.changpuak.ch/electronics/Curve_Tracer_advanced.php#
2024-02-17 BJT, FET Curve Tracer
This very comprehensive website has a transistor and FET Curve tracer. Also a simpler curve tracer for all components. Click on box to download the schematic, etc. https://www.changpuak.ch/electronics/Curve_Tracer_advanced.php#
2023-11-27 RCA BFO Audio Oscillator Photos
Chuck commented about the audio oscillator being a BFO, and it reminded me that I’ve got an old RCA BFO audio oscillator stuck away in the garage. It was a cheap way of getting an audio sine wave that covered the full audio band without any switching. Nowadays it’s all done in sine and other
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2023-11-14 My Supercharged Joule Thief At Devopedia
He uses my SJT circuit in his web page. https://devopedia.org/joule-thief-circuit
2023-10-30 Honda & High Tech 3D-Printed Metal Car Parts
Article Quote: “”The $99 million in Series C funding for Seurat is a good indication that the auto industry is bullish on 3D-printed car parts. Also referred to as additive manufacturing, 3D printing offers the potential to save energy, reduce waste, trim manufacturing timelines, increase throughput, and pump more flexibility into design and materials (check
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