Hi,
I'm currently in the process of designing a clap activated activated circuit. The circuit incorporates a 555 timer and is based upon a 555 timer monostable circuit , so that, using varying capacitors, the length of time for which the output is on can be varied.
The circuit works fine using an L.E.D. due its low power consumption: when you clap, the L.E.D. comes on for a specific amount of time (controlled by the resistor/capacitor network of the 555 monostable circuit).
However, I'd really need the circuit to turn a 9v motor on. If I just stick a motor in the place of the L.E.D., minus the 330 resistor, it just draws too much current, blowing up the 555 chip.
The simple answer is to use a relay, but the pin 3 outputs only 90 or so mA. All of the relays from www.rapidelectronics.com seem to have 10A or similar ratings.
I subsequently need help with choosing a relay that will work in the above circuit: it would ideally need to come from Rapid Electronics.
Please help!!
I'm currently in the process of designing a clap activated activated circuit. The circuit incorporates a 555 timer and is based upon a 555 timer monostable circuit , so that, using varying capacitors, the length of time for which the output is on can be varied.
The circuit works fine using an L.E.D. due its low power consumption: when you clap, the L.E.D. comes on for a specific amount of time (controlled by the resistor/capacitor network of the 555 monostable circuit).
However, I'd really need the circuit to turn a 9v motor on. If I just stick a motor in the place of the L.E.D., minus the 330 resistor, it just draws too much current, blowing up the 555 chip.
The simple answer is to use a relay, but the pin 3 outputs only 90 or so mA. All of the relays from www.rapidelectronics.com seem to have 10A or similar ratings.
I subsequently need help with choosing a relay that will work in the above circuit: it would ideally need to come from Rapid Electronics.
Please help!!