ok after doing some research ive realised i can get a dc plug pack,
then run that in to a rail splitting circuit and from there in to
linear regulators. i was going to get a 24vdc power pack that would
deliver 500ma. but i have no idea how many ma the synthacon (and
lm3915 circuits) would draw. im guessing the two lm3915's with their
LED bars would chew up 100ma, and i was going to run it off the power
pack directly.
so i wanted to know how much current you guys think the synthacon
would draw?
i ask because the obvious choice for rail splitting before regulation
would be a TLE2426 (i have a few left over from my HP amp projects),
however this can apparently only really handle 20-40mA loads. i have a
pimeta headphone amp that i built, it utilises a TLE running 3 buf
634's and 3 opa627's. i run it off two 9v batteries giving 18v. so a
different scenario but the TLE seems to do ok there.....the schematic
is here http://tangentsoft.net/audio/pimeta/misc/schematic1.pdf
the next option for parts i already have would be to create a virtual
ground circuit with a buffer (i have buf634's) that can apparently do
up to around 150mA. I'm sure there won't be ANY problems with 150mA,
but I have made TLE circuits in the past but not buffer based rail
splitters.
so my thoughts on a powersupply are:
24vDC plug pack -> rail splitting circuit -> regulation circuit
(7912/7812).
the other option is:
25vDC plug pack -> regulation circuit (lm317) -> rail splitting circuit.
what do you guys think about these options??
thanks
sean :)
then run that in to a rail splitting circuit and from there in to
linear regulators. i was going to get a 24vdc power pack that would
deliver 500ma. but i have no idea how many ma the synthacon (and
lm3915 circuits) would draw. im guessing the two lm3915's with their
LED bars would chew up 100ma, and i was going to run it off the power
pack directly.
so i wanted to know how much current you guys think the synthacon
would draw?
i ask because the obvious choice for rail splitting before regulation
would be a TLE2426 (i have a few left over from my HP amp projects),
however this can apparently only really handle 20-40mA loads. i have a
pimeta headphone amp that i built, it utilises a TLE running 3 buf
634's and 3 opa627's. i run it off two 9v batteries giving 18v. so a
different scenario but the TLE seems to do ok there.....the schematic
is here http://tangentsoft.net/audio/pimeta/misc/schematic1.pdf
the next option for parts i already have would be to create a virtual
ground circuit with a buffer (i have buf634's) that can apparently do
up to around 150mA. I'm sure there won't be ANY problems with 150mA,
but I have made TLE circuits in the past but not buffer based rail
splitters.
so my thoughts on a powersupply are:
24vDC plug pack -> rail splitting circuit -> regulation circuit
(7912/7812).
the other option is:
25vDC plug pack -> regulation circuit (lm317) -> rail splitting circuit.
what do you guys think about these options??
thanks
sean :)