Basic stamp and mosfet, i cant switch on and off

Ject

Hi,

I bought a starter kit( a homework board ) and a mosfet ( BUS 90A). I am trying to create a heating circuit using the BS2 as a controller for 50cycles ( on 1min and off 1min).

I connect pin 6 to the GATE
Standalone power supply +ve(10V) connected to-->1ohm resistor-->Heating element( a wire )--> DRAIN
SOURCE--> -ve of power supply

i insert the programming for the pin 6 to on for 1min and off for 1mins, and repeat cycle for 50times.. however, the circuit doesnt work as what i wish it does. the current keep flowing within the heating element continuously without stopping. what is wrong here?

however, when i try using LED, it works:

I connect pin 6 to the GATE
Vdd(+ve) on the homework board connected to -->LED--> DRAIN
SOURCE--> 1k ohm resistor--> Vss(-ve) on homework board

what is wrong here?

Ject

PJAllen

You need a pull-down resistor on the gate (see dwg attached.)