There's an HV5522PG under each paired tube board that takes care of the HV switching. However, I am not the designer of the electronics. Carl Ott of this forum is and can speak to this in much greater detail than I.
On Mar 6, 3:38 pm, "Ulysses J. Balis" <[email protected]> wrote: > As a related question for this design, how do you carry out the excitation of > nixie cathodes without the use of high voltage transistors? Does the > microcontroller have high-voltage-capable output driver lines? The parts > count appears to be extremely low, which is amazing. > > Ulysses Balis > > From: Ulysses Balis [mailto:[email protected]] > Sent: Sunday, March 06, 2011 6:19 PM > To: [email protected] > Subject: Re: [neonixie-l] 6 Digit Direct-Drive B7971 clock kit > > Yes, I am very interested! > > Thanks! > > U. Balis > > On Fri, Feb 25, 2011 at 2:21 PM, MichaelB <[email protected]> wrote: > > To all, > > As some of you may know, Carl Ott of this forum has done a wonderful 6 > digit direct-drive clock design for the B7971. I have been working > with Carl and another forum member and have had a batch of PCB’s made > per his gerber files. This has resulted in my building an open-top > version of his clock using Carl’s software which can be seen here on > my site: http://www.badnixie.com/The_%22Modular%22_Nixie.html and > also on Brian Stuckey’s site: (scroll down a > bit)http://www.tubeclockdb.com/nixie-clocks.html We have received some > inquiries about offering a kit like the clock you see here. It would > be complete with the acrylic top, drilled and tapped base plate, colon > towers and the whole nine yards. So, we’re trying to determine if > there is enough interest to make an initial run of 10 kits. We are not > sure of the selling price yet, but our driving force here is to offer > a product to the community that fills a void, not try to gouge our > brethren. > > Note the aluminum fab’d bracket mounting the rotary encoder. This will > be replaced with a right angle rotary that will mount directly to the > PCB. Carl plans to do a little more tweaking to the software as well. > Also there is a fair amount of SMD component soldering involved by the > user and the kit will be offered without tubes. > > Here is a list of the feature set as it stands now. > > ==Unique Rotary Encoder User interface > > ==Auto Display dimming feature via photo sensor > > ==Adjustable DIM and Brightness levels with Adjustable Dimming > threshold > > ==QuickTime Set feature- quickly and easily set current time without > entering config. mode > > ==9 Selectable FONTS > > ==Clock spells out the Month and Day of the week, also displays date > and year > > ==Four user selectable colon modes- OFF, ON, BLINK, ALT, or RAILRD > (railroad) > > == TCXO time based > > ==Time On/Time Off sleep setting > > ==Smooth Digit Cross Fade feature with fade rate adjust. > > ==12/24 hour display mode selection > > ==Leading Zero Suppression selection > > ==Adjustable Pulse width Modulation setting value. > > ==Light Value Test Feature to determine optimal dimming point > > ==CW/CCW Rotary encoder direction selection > > Your feedback is appreciated! > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To post to this group, send an email to [email protected]. > To unsubscribe from this group, send email to > [email protected] > <mailto:neonixie-l%[email protected]> . > For more options, visit this group > athttp://groups.google.com/group/neonixie-l?hl=en-GB. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
