Hi, I'm an amateur electronics enthusiast from China.
A few years ago,I bought 20-pcs of NEC LD8140 VFD screens,and tried to light it up.
In the beginning of the year, I designed a VFD drive circuit without using transformer, and published it in the <China Radio Magazine 2012.05>.
Now I post it on my new website to share with all the VFD fans, hop those articles and designers can help you improve your work.
The original articals were written in chinese,but you can translate it into english by using goole translate app.