I need to use a 10 LED bar graph to gisplay a LPG gas reading. but using a picaxe to control all 10 LEDs is a disguisting waste of outputs...
Are there any solutions to this.
One thing I did consider is to use 10 inputs and make the inputs low and connect the LEDs to the 3v + and the input pin. with a 220 ohm resistor and a signal diode.
are there any ideas that involve using less than 10 of any type of pin??
One wire bus?
Thanks
d-d-denz
Are there any solutions to this.
One thing I did consider is to use 10 inputs and make the inputs low and connect the LEDs to the 3v + and the input pin. with a 220 ohm resistor and a signal diode.
are there any ideas that involve using less than 10 of any type of pin??
One wire bus?
Thanks
d-d-denz