LM317T Voltage Regulator with Pass Transistor

My personal vaporizer. 5 volt switching regulator. Digital voltage display, charging port, horn switch, tactile switch, two slide toggle switches one for mas...



http://www.youtube.com/watch?v=fvDwcrnm2bU&hl=en

Please watch this in the highest quality, as it shows much better detail. This is just a preview of my on screen display project in progress. I will have a better video uploaded soon, I just wanted to show people it is not vaporware ... it really works. In this demo, text is drawn and a logo is blitted. All of this is dynamic; it's being drawn at approximately 20 frames per second. As the processor only has 3 MIPS or so of its 39.7 MIPS available for drawing graphics (read: the rest is dedicated to the TV output stage) I think this is very impressive. But look out for even greater performance increases in future versions where I implement a few additional speed ups. The glitch at the top is due to a bug in my OSD, which I hope to fix in the first release. It is just reading the memory before the video RAM and you are seeing the SFRs and line data. Nothing to really worry about. It is helpful as an indicator of frame rate. Super OSD is a free, open-source (GPLv2)** graphical on screen display for PAL and NTSC video signals. It is primarily designed as an alternative to current model aircraft OSDs, which are usually too limited, WAY too expensive, or closed source. It is based on a dsPIC33FJ128GP802. This device has 16K of RAM and 128K of FLASH. Almost 94% of the RAM is used but only about 17% flash is used, this includes the logos you see. An LM1881 is used to sync and a LM317T is used to generate a +3.37V supply for the 3.0-3.6 volt dsPIC. 256x192 pixels are drawn, and ...



http://www.youtube.com/watch?v=RE18gHRUR40&hl=en

Display problem on a Commodore PET 2001N. The problem was caused by a faulty voltage regulator in the monitor. For the full story: www.cosam.org



http://www.youtube.com/watch?v=3GDIN2wlCW8&hl=en

upload test (1x)PIC16F887A [Microntroller Unit, storage everything and process everything] (1x)20mhz crystal [clock source for the processor] (1x) LM317 [power supply for LED, and LED brightness control] (1x) 10K pot [adjust voltage on the LM317 IC for LED brightess control] (1x) 220ohm resistor [feedback for LM317 IC operation} (1x) 78L05 100ma fix 5V regulator [PIC power supply] (2x) 18pf capacitor [crystal filter] (3x) SN75468 IC [21 column LED cathod current sink] (8x) PN2907A [8 row LED anode current source] (4x) NO pushbutton [for changing menu and character setup] (4x) 0.1uf capacitors [filter noise on pusbutton switch] (1x) 2200uf 10V capacitor [5-voltage line filter] (1x) 8pair-DIP switch (for change mode from programming the PIC to normal operation and also in future, for cascading multiple board ]



http://www.youtube.com/watch?v=ZqFMbjsWD4E&hl=en