I need a circuit that develops rapid pulsing of an medium high power LED group, then a pause and repeat of rapid flashing (adjustable.)
I have wired two 555 timers using around a one second pulse from timer 1 to control timer 2 using the reset pin 4 on timer 2. Timer two is adjustable for the rapid flashing. Timer two pin 3 is output to a driver transistor.
What is happening is I get the rapid flashing through a driver transistor, but the pause cycle is a high, causing the LED circuit to remain on between rapid flash cycles.
I would like the pause cycle to be no power to the LED circuit for at least .5 seconds. I tried tying reset pin 4 of timer 2 low via a 1K resistor, but that didn't work - unless I fat fingered the connection.
The circuit is driven by a nine volt battery.
What am I doing wrong?
I have wired two 555 timers using around a one second pulse from timer 1 to control timer 2 using the reset pin 4 on timer 2. Timer two is adjustable for the rapid flashing. Timer two pin 3 is output to a driver transistor.
What is happening is I get the rapid flashing through a driver transistor, but the pause cycle is a high, causing the LED circuit to remain on between rapid flash cycles.
I would like the pause cycle to be no power to the LED circuit for at least .5 seconds. I tried tying reset pin 4 of timer 2 low via a 1K resistor, but that didn't work - unless I fat fingered the connection.
The circuit is driven by a nine volt battery.
What am I doing wrong?