Brayd:
V = I/R
Not in this universe.
0.78V/1.32ohms=591mA (The 500mA estimate was close.) *This is with the present circuit
4.5V/1.32ohms=3.41A * This is when connected directly to the 4.5V supply.
Edit: But I doubt if the supply would really provide this much current - the output voltage would drop considerably under this load. (And eventually the wall wart would die.)
Hi,
Brayd:
I think the current amount of current is fine (it's only 500 mA)-- but the problem is that the current isn't actually causing the spring to move-- just the transistor to heat up.
If you leave it laying on the bench I think that is all it will do, not move.
If you read the spec sheet, and the examples on the Interweb, you will find they use it in TENSION not a coiled spring.
Tom.....
