22 Dec
2007
22 Dec
'07
9:30 a.m.
On Dec 21, 2007 8:58 PM, Tom Peters <tpeters at mixcom.com> wrote:
Anyone know a good way to drive these, four or six of
them in an array? I
need 170 volts, 21ma all cathodes, between 4.0 and 6.0ma any individual
cathode. I was thinking of a pic at each tube, sort-of a character
generator that would take an ascii code and drive the right segments. Some
sort of escape code would let you send 16 bits to be interpreted literally,
i.e. turn on the literal segments corresponding to the bits set, for more
fanciful displays.
Check the Microchip app note TB053 "Generating High Voltage Using the
PIC16C781/782", the HV is generated from 9V using some discrete
components and the PWM output (+analog in) of a PIC.
Joe.