need help with current sensor

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dryden_burton

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Hi everyone, i need help, i want to build a safety device, heres what i need it to do.

I need a load sensor circuit which will sense a small hot glue gun when it is plugged in to a GFCI outlet, and turn a LED on around 20 feet away.

It would be nice if it could be placed in a double gang PVC weather proof box with two GFCI outlets.

Any help would be great thanx
 
I have not tried this but it should work. My hot glue gun is 20 watts which means it draws 167 mA at 120 volts. A 10:1 current transformer will supply 16.7 mA to an LED. I used two LEDs back to back to protect against reverse voltage.
 

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Russlk said:
I have not tried this but it should work. My hot glue gun is 20 watts which means it draws 167 mA at 120 volts. A 10:1 current transformer will supply 16.7 mA to an LED. I used two LEDs back to back to protect against reverse voltage.
Click to expand...

thanks i'll try that, it sounds cheaper than the other ideas
 
dryden_burton said:
i tried it, it didnt work
do i have to use uninsulated wire
Click to expand...

If you don't use insulated wire it will short together!. Don't forget, you are only winding one of the two mains wires through the core!.
 

i only put one of the two mains wires through the core the hot,
used insulated wire and used a ferite core from another transformer it still doesnt work
maybe there is too much line loss
 
i found one of these **broken link removed** in my junk box but it wont light an led with the glue gun, it works with a bigger load but what good is it if it wont work with the glue gun.
 
ok maybe i got it wired wrong it has 3 tabs comeing out of it like this
*
* *
i have them hooked up like this

*to LED
*------*to LED

maybe thats wrong i'll have to screw around with them to try and get more power out of it,
or maybe i could hook it to a voltage multiplier :?:
 
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