Member Since: January 13, 2011

Country: United States

  • Nice work Pete, the lighting looks great. I also recently installed some LED lights under my cabinet but ended up using those waterproof LED strips.

  • Applications of the basic current mirror circuit that I have used it for:

    1) Very simple voltage controlled current source (this has been the most handy for myself) 2) Change a sinking current into a sourcing current or the other way around 3) Active loads on an amplifier (okay… not something I usually do) 4) Setting bias currents that are identical or multiples of the mirrored current 5) I’ve used it to maintain consistent LED brightness over a bunch (10ish) LEDs

  • Congrats to Bill and Mara and great job with the cards! I just hope you didn’t have to send out too many of these, weddings are expensive enough as it is.

  • Jeff, you got some real talent at lecturing! You do a great job at getting your message across, keep up the awesome work.

  • It’s a Samsung monitor with 170 degree horizontal and 160 degree vertical viewing angle. This isn’t a POS monitor. The fact is computer monitors have dropped in price significantly over the last few years. I bought my Acer 24" LCD for $180 bucks two years ago and I loved it when I bought it and still love it now.

  • I agree this monitor seems a bit over-priced. I can purchase a 22", 1920x1080 with HDMI and VGA inputs, LED backlight for $139.99 at TigerDirect. I recognize that this display runs on 12V which is definitely a convenience factor but still…

  • Pete,

    I enjoy these videos a lot and they offer some good information but you mentioned something about the body diode I would like to re-clarify. The body terminal in the majority of discrete MOSFETs is tied to the source terminal because that is the most common usage. The body terminal must be connected to something otherwise you have a BJT structure with the NPN but the base terminal would be floating causing random behavior. However, tying the body diode to the source terminal creates a parasitic diode from the body P-doped structure to the N-doped drain terminal. The body diode doesn’t have any usefulness for ESD. The whole ESD issue for MOSFETs is the electric field created between the Gate and Body terminals. The oxide layer is so thin that you get enormous electric fields (electric field is Volts/meter) across the oxide layer. Some discrete MOSFETs do include ESD protection but it is a added TVS-type diode from Gate to Source.

    Thanks for the video, keep them coming!

  • I’m curious as to why the PCB was designed to have the coil pins close to the high voltage terminals? Turning the relay 180 degrees would allow for much bigger traces in the same form factor. Also, there should really be stitching vias between the top and bottom high-current traces for better heat transfer.

  • Would it be possibly to let us do the quiz just for fun? I only got to see the first question and just wondered how I would have done. If I can learn something then I feel like I am a winner anyways.

No public wish lists :(