JFDuval said:
Hi!
The LM3914 have internal resistances included. You have a pin to select the amount of current you want for the leds.
I want about 20mA to 25mA but nothing less then 20mA
what pin is it to select the resistances?
i am not good at electronics, i am a total beginner. The person who made this schematic for me is AUDIOGURU.... he give me value for the capacitor for 555timer and resistors.
here are specs for the LED's
Emitted Colour : WHITE
Size (mm) : 5mm T1 3/4
Lens Colour : Water Clear
Peak Wave Length (nm) : N/A
Forward Voltage (V) : 3.2 ~ 3.8
Reverse Current (uA) : <=30
Luminous Intensity Typ Iv (mcd) : Average in 10000
Life Rating : 100,000 Hours
Viewing Angle : 20 ~ 25 Degree
Absolute Maximum Ratings (Ta=25°C)
Max Power Dissipation : 80mw
Max Continuous Forward Current : 30mA
Max Peak Forward Current : 75mA
Reverse Voltage : 5~6V
Lead Soldering Temperature : 240°C (<5Sec)
Operating Temperature Range : -25°C ~ +85°C
Preservative Temperature Range : -30°C ~ +100°C
thanks
Max