I have attached some notes about bipolar junction NPN and PNP transistors.
Bipolar Junction NPN and PNP transistors
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Category Archives: Electronics
300in1 Project 155. DTL OR GATE
So I did a circuit. This is a diode/transistor logical OR gate. I’m learning. What I’d like to understand is why the resistors are necessary and why are the resistor values picked such as they are? I’ve asked a question about this over on the EEVblog: What is the purpose of the resistors in this schematic?.
Saving an SSD
This is awesome. This bloke diagnosed and fixed a problem with an SSD drive: Crucial SSD Drive Failed – Can we save data.?
I found the thermal imager used in the video on his website: UNI-T UTI260B Thermal Imager Camera 256px x 192px. Definitely want to get myself one of those!
Custom 2.5-inch IDE SSD Assembly and Testing
This video is awesome. This guy built his own SSD! Custom 2.5-inch IDE SSD Assembly and Testing
Radio Shack (Tandy) Kit
So it turns out that in competition to the Maxitronix stuff that I was interested in there were a bunch of competing kits from Radio Shack / Tandy.
Solder alloys
A great Wikipedia page about solder alloys, including info about melting points.
There is also this Alloy Temperature Chart with similar info.
Speedy Bend – Resistor Lead Forming Tool
So I got myself some of these Speedy Bend – Resistor Lead Forming Tools. There’s a video on YouTube about how to use them: ProbeMaster Speedy Bends: Axial Lead Forming Tools.
Electric and Magnetic Interactions
Some holiday reading arrived for me today: Electric and Magnetic Interactions.
The End of the Full Bridge Rectifier?
A great video over here: The End of the Full Bridge Rectifier? (Sorry ElectroBOOM) Active Rectifier is here!.
You can find the equipment here: TEA2206, TEA2208.
Make: stuff
Today I came across these: