High side & Low side swiching?
hi,
may run folks before connect , fry :-)
baiscally switch backlight led on lcd on , off via transistor , i'm not sure high/low side switching thing. lcd led in question shares gnd rest of display option open high side switching - below circuit propose not sure correct? transistor in there @ mo bc817 npn : http://www.nxp.com/documents/data_sheet/bc817_bc817w_bc337.pdf (the symbol have used if pnp - sorry that).
may run folks before connect , fry :-)
baiscally switch backlight led on lcd on , off via transistor , i'm not sure high/low side switching thing. lcd led in question shares gnd rest of display option open high side switching - below circuit propose not sure correct? transistor in there @ mo bc817 npn : http://www.nxp.com/documents/data_sheet/bc817_bc817w_bc337.pdf (the symbol have used if pnp - sorry that).
for high side, want use pnp.
high gateon off, low offon.
high gate
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