hey guys!
I am here to just make sure i am not missing anything with my fiddling.
I have an LM317T regulator that i was going to use to power my 7.4v heater using a 9v battery.
i hooked it all up - .1uf ceramic on the input - and a 220uf (16v) Electrolytic on the output.
For my reference resistor (fixed value) i used 2 470ohm resistor in parallel to give me 230 (was 240 in the datasheet).
This was then hooked up to a 10K potentiometer.
I powered the circuit with a 9V battery and every time i connected my load (varying heaters at numerous voltage ratings) the output would drop to 0 volts.
I just want to clarify that the issue is the inability for the 9v battery to produce the current necessary.
When i use a 10mm LED i got i can turn it on and off with the circuit and vary the voltage from 2.2 (led off) to 3.4 led is on fully and all the way up to 14v (from a 9v - im confused!).
So to clear this up, the 9V battery cannot drive my heater - this is why the output drops to 0v - Though i would still like an explanation for this.
The Led's work due to their low current requirement. correct?
Thanks for anything that can shed light on my dark dark times
HAHA
I am here to just make sure i am not missing anything with my fiddling.
I have an LM317T regulator that i was going to use to power my 7.4v heater using a 9v battery.
i hooked it all up - .1uf ceramic on the input - and a 220uf (16v) Electrolytic on the output.
For my reference resistor (fixed value) i used 2 470ohm resistor in parallel to give me 230 (was 240 in the datasheet).
This was then hooked up to a 10K potentiometer.
I powered the circuit with a 9V battery and every time i connected my load (varying heaters at numerous voltage ratings) the output would drop to 0 volts.
I just want to clarify that the issue is the inability for the 9v battery to produce the current necessary.
When i use a 10mm LED i got i can turn it on and off with the circuit and vary the voltage from 2.2 (led off) to 3.4 led is on fully and all the way up to 14v (from a 9v - im confused!).
So to clear this up, the 9V battery cannot drive my heater - this is why the output drops to 0v - Though i would still like an explanation for this.
The Led's work due to their low current requirement. correct?
Thanks for anything that can shed light on my dark dark times
HAHA