hello there,
did 1602 led display operating @ 5v running on due operates 3.3v power supply?
i thinking of using 1 of bi-directional logic level converters use mosfet transistors provide logic level conversion.
however, ran possible issue if there buss contention @ time (such during start when things not defined when normal operating takes place) or glitch in code means arm chip have absorb energy either +5v system or ground.
for example, if there i2c chip connected arm chip when i2c chip provides "ack" signal arm i2c pin (the data pin) provides logical "low" near 0 volts (about 0.5 due series schottky diode). if arm happens outputting +3.3v signal @ time, there lot of current coming out of pin. means series resistor idea.
but main question is, did 1602 display , running due, , if so, technique used?
thank you.
did 1602 led display operating @ 5v running on due operates 3.3v power supply?
i thinking of using 1 of bi-directional logic level converters use mosfet transistors provide logic level conversion.
however, ran possible issue if there buss contention @ time (such during start when things not defined when normal operating takes place) or glitch in code means arm chip have absorb energy either +5v system or ground.
for example, if there i2c chip connected arm chip when i2c chip provides "ack" signal arm i2c pin (the data pin) provides logical "low" near 0 volts (about 0.5 due series schottky diode). if arm happens outputting +3.3v signal @ time, there lot of current coming out of pin. means series resistor idea.
but main question is, did 1602 display , running due, , if so, technique used?
thank you.
just put series resistors on i2c lines. 330 ohms works well.
regards,
ray l.
regards,
ray l.
Arduino Forum > Products > Arduino Due (Moderator: fabioc84) > 1602 (5v) LCD Display on Due (3.3v)
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