Skip to main content ↑ ↓

Show Posts

This section allows you to view all Show Posts made by this member. Note that you can only see Show Posts made in areas you currently have access to.

Messages - markeprice

1
Project logs / Re: Nixie SMPS efficiency tested
I am using a nixie type power supply that uses a 555, IRF740 and BC547c.  I am having a terrible time getting anything other than the 12-15VDC at the input at the output of the high voltage (B+).  Basically if I have 12VDC going in, I have 12VDC at the output.  I have swapped out all the compenents listed earlier plus the 4.7uf cap.  No change.  Has anyone got any troubleshooting tips for me?  I have gone over a few different schematics that use the same or similar components and cross checked my pcb implementation (on a superfly amp board by Rick Holt, frequency central) and cannot see what might be the problem.  I am guessing since there is no difference between the input and output that there is no "charge pumping" going on.  I don't own a ocilliscope, just a multimeter.  Can you provide a recent tested and verified schematic of this type of supply.  Thank you.  Getting frustrated!  Mark

( ! ) Fatal error: Uncaught exception 'Elk_Exception' with message 'Please try again. If you come back to this error screen, report the error to an administrator.' in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
( ! ) Elk_Exception: Please try again. If you come back to this error screen, report the error to an administrator. in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
Call Stack
#TimeMemoryFunctionLocation
10.01232248584session_write_close ( )...(null):0
20.01272380160ElkArte\sources\subs\SessionHandler\DatabaseHandler->write( )...(null):0
30.01272380936Database_MySQL->query( ).../DatabaseHandler.php:119
40.05792519656Database_MySQL->error( ).../Db-mysql.class.php:273