Long article https://sites.google.com/site/transistorhistory/Home/us-semiconductor-manufacturers/raytheon-part-one-2 A comprehensive history of the Raytheon corporation. Also information about other companies.
Archive for the ‘Electronic Components’ Category:
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
2024-08-31 AM Transmitter, Low Power
This is an AM transmitter that this guy built. He says it’s rich in harmonics – it has no tuning nor low pass filtering and the stages are class C, no forward bias. It should have all the things used to minimize harmonics, like a low pass filter. Class C operation is used to maximize
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2024-08-21 Adjustable Power Supply Uses Sziklai Pair
This messy bunch of parts is a 0 to 9V adjustable power supply. The original power supply board connected the two transistors in the Darlington Configuration. The unregulated 12V input goes through a 187 ohm resistor to a 10V zener diode to give a stable reference voltage. This voltage is fed to a 2.5k linear
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2024-08-21 Video: Build An FM Microphone
This 2.5 min video uses a SS8050 transistor which is not very good for a 100 MHz oscillator. https://www.facebook.com/reel/347155875050146?mibextid=9drbnH&s=yWDuG2&fs=e
2024-08-08 A3144 Hall Effect Sensor Short Video
The A3144 Hall Effect sensor short video, shows pinout, circuit. A3144 has a built-in schmitt trigger. The output is switched to ground. https://www.facebook.com/reel/1024280052731640?mibextid=9drbnH
2024-08-06 Toroid Inductance Charts
I wound a FT37-43 with 10 turns and measured it at 42 uH, just like it says. https://www.electronics-tutorials.com/basics/toroidcharts_mcq.htm Also visit Ian Purdie VK2TIP’s “Toroids” Page
2024-06-09 SMD LEDs Identification
Nice to know how to ID the polarity of SMD LEDs. https://lighthouseleds.com/blog/polarity-guide-of-0402-0603-0805-1206-and-most-all-smd-leds.html
2024-06-04 Gallium Nitride MOSFETs To Revolutionize Power Electronics
Gallium nitride power electronics will replace silicon and will make laptop power adapters smaller than a golf ball and will save major amounts of electricity. GaN devices will waste a lot less power, which will enable power electronics equipment to be made smaller and more efficient. Quote: “”GaN-based power electronics, on the other hand, could
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