There is one more question about Experiment 11 from "Make: Electronics" by Charles Platt.
The trouble is that my LED blinks only once, when I connect circuit to power source. (I tried 6V, 9V and finally 12V DC)
As I understand, capacitor should discharge, but it holds the voltage and there is no "charge/discharge" process described in the book that forces LED to blink.
There is the original circuit from the book:
Photo of my circuit is below (yes, it is connected to power source):
Also I created Fritzing breadboard diagram and marked some points:
I checked voltage between points displayed on the fritzing diagram (I use 12V DC power source):
- Vab = 0.04V (after multimeter touch voltage reduces to 0.01V)
- Vcd = 11.4V (after multimeter touch voltage reduces to 9.47V)
- Vef = 4.9V
- Vgh = 8.83V
- Vij = 0V
Any ideas why LED blinks only once but not constantly?
Finally, one more noob question. As I understand, 'gate voltage' is Vgh. What is then 'anode voltage'? Is it Vcd?