I built a simple astable timer, but since I'm a novice at electronics and am just starting out, I have a problem. I am trying to have a timer to turn something on for 5-10 seconds and then turn off for about 20-30 seconds. To test this out I put an LED on pin 3 (output), but the LED is flashing at the same rate about every 1/2 second. I have a 2.2M OHM resistor between pins 7-8. I have a 1M OHM resistor between pins 7-6. The Cap. is 10 uF. Am I correct that the Output High is the time that the circuit is off and that the Output Low is when the circuit should switch on. This calculated if I am correct to be 22 seconds off time and almost 7 seconds on time. Why is my LED just blinking on/off the way it is?