Gday Bill, you were able help me alot with 555 timers, great work on the time saver reference guide - it did just that !
transistors are operating largely as they should, i just had too learn too correlate the datasheets and the transistor connections and the current flow direction,
however the only thing that remains unclear too me is were too put the load in the circuit, transistors can collect positive or neg depending on model
but some like too push and some like too pull, - still havnt developed that fact into a mental set of rules that prevent the desire too trial and error and risk the semiconductors
for the last few days ive been toying with 555's and pulsing small mains transformers with 1 \ 2 stage transistor amplifiers , but im not getting the expected voltages from the 120\240 side of the transformers
depending on the setup im getting between 25 and 50 volts output from 12 volts with a 1:20 and a 1:10 transformer
stable at exactly 50hz and the optimum duty cycle seems to be about 42% (measured on $30 usb crow
increasing the voltage on the output is my aim but now i find myself getting stuck again
------
ps measuring the output voltage over a full wave bridge and a 220uf \ 440v cap
transistors are operating largely as they should, i just had too learn too correlate the datasheets and the transistor connections and the current flow direction,
however the only thing that remains unclear too me is were too put the load in the circuit, transistors can collect positive or neg depending on model
but some like too push and some like too pull, - still havnt developed that fact into a mental set of rules that prevent the desire too trial and error and risk the semiconductors
for the last few days ive been toying with 555's and pulsing small mains transformers with 1 \ 2 stage transistor amplifiers , but im not getting the expected voltages from the 120\240 side of the transformers
depending on the setup im getting between 25 and 50 volts output from 12 volts with a 1:20 and a 1:10 transformer
stable at exactly 50hz and the optimum duty cycle seems to be about 42% (measured on $30 usb crow
increasing the voltage on the output is my aim but now i find myself getting stuck again
------
ps measuring the output voltage over a full wave bridge and a 220uf \ 440v cap