Attached is a schematic of my circuit.
1) I am burning out 555 timers, 9 to be exact. I am using a 12Vdc/3Amp wall wart as a supply. Objective is to maximize the voltage and current to a coil to generate an EMF. The supply voltage is well within the specs. In addition, there is a massive actual voltage drop vs calculated drop to the transistor. Any ideas would be greatly appreciated.
2) Also on the schematic are three methods I have found to calculate the value for the base resistor of a transistor. Which one if any is of any use ?PEMF Transistor 6121612062016.pdf
1) I am burning out 555 timers, 9 to be exact. I am using a 12Vdc/3Amp wall wart as a supply. Objective is to maximize the voltage and current to a coil to generate an EMF. The supply voltage is well within the specs. In addition, there is a massive actual voltage drop vs calculated drop to the transistor. Any ideas would be greatly appreciated.
2) Also on the schematic are three methods I have found to calculate the value for the base resistor of a transistor. Which one if any is of any use ?PEMF Transistor 6121612062016.pdf