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We seem to have a 2n7000 salesman on board!!!
Sometimes...... Only sometimes, my sarcasm gets the better of me.. I just noticed you like mosfets! They are okay when needed.... I use them on a bridge!! Nfets as there is no voltage loss....I guess being tutored during the valve/tube era, I readily adopted the Mosfet when it arrived!
The love of bipolar seems seems to be pervasive.
Max.
Less time?..
But as a simple switch you'll spend less time just using a 2n2222...
Show a fet to newbie and they head for the hills..!
We seem to have a 2n7000 salesman on board!!!
The fact that there is 0.7v at the base of the transistor means its on!! The relay needs how much current to switch on??? Is it a 5v coil in the relay??? As there is no diode across the relay are we already too late????
Especially the base having a 1k resistor... I would try a 270 ohm base resistor to fully turn on the transistor, I would also ditch the 100 ohm resistor..I suspect the resistor is the problem and there is not quite enough current to pull the relay in??
So when there is 0.7v at the base what is at the collector and what is across the resistor / coil?? I suspect the resistor is the problem and there is not quite enough current to pull the relay in??
Especially the base having a 1k resistor... I would try a 270 ohm base resistor to fully turn on the transistor, I would also ditch the 100 ohm resistor..
Figured it could not hurt if coil shorted, but they are almost a short anyway.
One other consideration if saying the 'coil is shorted' is hopefully it is a DC relay, if AC, the coil resistance is very much lower that a DC type for the same voltage.Will drop in a 0 ohm. Figured it could not hurt if coil shorted, but they are almost a short anyway.
I use 1K there all the time,