Have hardly used LT Spice, but I have figured out one or two things about it. This circuit (without S1) gives me an approximate 30 second time delay, which is exactly what I want as far as timing is concerned. However, I want to control the switch in the circuit, but don't know how to do that. Here's the ASC file. Please show me how to modify the switch to turn on after just one second. I need to see how the circuit will perform beyond just applying the voltage from the battery. In other words, will the switch cause some adverse affect.
As far as the components go, I'm using generic components. I will have to eventually figure out how to add things like Op Amps and MOSFETS. For now the circuit has been adjusted close enough to the timing I want. Accuracy is not needed, just an approximately 30 second delay before Vout goes high. The switch is to prevent the battery from draining when the circuit is not active.
This is going to be a freezer door open alarm. If the door is not fully closed (or open) for about 30 seconds, the alarm will start to sound. If you have any other advice, please share.
Thanks.
[edit] The alarm (load) will be 6 - 16VDC @ 40mA Max. [end edit]
As far as the components go, I'm using generic components. I will have to eventually figure out how to add things like Op Amps and MOSFETS. For now the circuit has been adjusted close enough to the timing I want. Accuracy is not needed, just an approximately 30 second delay before Vout goes high. The switch is to prevent the battery from draining when the circuit is not active.
This is going to be a freezer door open alarm. If the door is not fully closed (or open) for about 30 seconds, the alarm will start to sound. If you have any other advice, please share.
Thanks.
[edit] The alarm (load) will be 6 - 16VDC @ 40mA Max. [end edit]
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