Uln2803 Led Schaltung. The device consists of eight npn darlington pairs that feature high voltage outputs with common cathode clamp diodes for switching inductive loads. Adafruit industries unique fun diy electronics and kits uln2803.
Utc alldatasheet datasheet datasheet search site for electronic components and. The operating temperature of uln2803 lies in the range of 65 c 150 c. In order to operate this chip no additional power is needed.
Adafruit industries unique fun diy electronics and kits uln2803.
You need a current limiting resistor with every led and you connect the led resistor combination in parallel. Before we move further we must know what is darlington transistor. The uln2803a is a high voltage high current darlington transistor array. This is due to thermal considerations the chip will get too hot.
