R1 = Rheostat
R1 = 100K (0..2Hz)
R1 = 47K (0.6Hz)
R1 = 22K (1.1Hz)
R1 = 10K (2.1Hz)
R1 = 4.7K (3.6 Hz)
R1 = 2.2K (6.1Hz)
R1 = 1K (8.3Hz)
Reduce C1 for faster pulse rates
For the 220 ohm resistor connected in series with 3 parallel LED's, the 220 ohm resistor is a 1/2 watt rated resistor.
