Hello,
I need to switch on or off device (2A) 4-5v using 3.5V as logic input.
I have LM339 i drive it using 4 battery nimh, 4.8V, but i allow to discharge that device to 4V.
LM339 output (as comparator) is (VCC - 1.5v) = that's mean if i input 4.8v i get about 3.3V.
I try connect that to gate BUZ11 N-FEET transistor, but without success.
Problem is i can get only small amount of current, under 0.5A by BUZ11 !
When i attach gate to VCC 4.8 i can get without problem 2A.
In my opinion (but i can be wrong) BUZ11, want about 5v as input... but i can't get it from lm339.
Can You recomend me soemthing what i can do ?
What about Thyristor ?
Do You know any, what will allow me constant 2A, and will be full open using 3.3 - 2.5 V ?
Regards
I need to switch on or off device (2A) 4-5v using 3.5V as logic input.
I have LM339 i drive it using 4 battery nimh, 4.8V, but i allow to discharge that device to 4V.
LM339 output (as comparator) is (VCC - 1.5v) = that's mean if i input 4.8v i get about 3.3V.
I try connect that to gate BUZ11 N-FEET transistor, but without success.
Problem is i can get only small amount of current, under 0.5A by BUZ11 !
When i attach gate to VCC 4.8 i can get without problem 2A.
In my opinion (but i can be wrong) BUZ11, want about 5v as input... but i can't get it from lm339.
Can You recomend me soemthing what i can do ?
What about Thyristor ?
Do You know any, what will allow me constant 2A, and will be full open using 3.3 - 2.5 V ?
Regards