So I've only really gotten into actual breadboarding, etc. in the last two weeks so I'm an absolute noob when it comes to this kind of thing, so please forgive my ignorance, and be clear with any advice you've got handy!! Here goes...
Building a GSM remote car starter for someone. The key fob for the remote starter has a lock button and a start button. The lock button must be pressed for 1 second (approximate) and then released for one second. After these two seconds have passed, the start button must be pressed for 4 seconds.
I at first was going to use two 555 timers and then instead began playing around with a 556 timer. My first thought was to just use both timers as astable, but the problem is that both go high as soon as current is applied, and then go low. I needed to delay the second timer by those two seconds before going high for 4 seconds.
So then I thought perhaps a monostable one shot timer on one side (go for one second) which would be connected to the second timers trigger pin such that when it goes low, the second timer would then be activated high. However, it seems that monostable timers seem to require a switch be pressed to flip its state, so I'm not sure how I could make that happen.
The entire setup would have a programmable window of time, say 6 seconds, so its not imperative that both timers turn themselves off etc. as power will be lost after whatever time works best. I have a 556 on my hands and two 555's available at the moment, but if needed I can purchase whatever components you guys recommend.
Anyways, any information or ideas would help this very new, aspiring young person to pursuing more projects in electronics!
Building a GSM remote car starter for someone. The key fob for the remote starter has a lock button and a start button. The lock button must be pressed for 1 second (approximate) and then released for one second. After these two seconds have passed, the start button must be pressed for 4 seconds.
I at first was going to use two 555 timers and then instead began playing around with a 556 timer. My first thought was to just use both timers as astable, but the problem is that both go high as soon as current is applied, and then go low. I needed to delay the second timer by those two seconds before going high for 4 seconds.
So then I thought perhaps a monostable one shot timer on one side (go for one second) which would be connected to the second timers trigger pin such that when it goes low, the second timer would then be activated high. However, it seems that monostable timers seem to require a switch be pressed to flip its state, so I'm not sure how I could make that happen.
The entire setup would have a programmable window of time, say 6 seconds, so its not imperative that both timers turn themselves off etc. as power will be lost after whatever time works best. I have a 556 on my hands and two 555's available at the moment, but if needed I can purchase whatever components you guys recommend.
Anyways, any information or ideas would help this very new, aspiring young person to pursuing more projects in electronics!
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