Hi,
I am new to this forum is fairly new to electronics. College 15 years ago was about the last time I delved into it!
Basically, I need a circuit to generate a delayed button press upon its power source being applied. Once the said circuit is powered on (power between 13V and 20V), there should be a delay of around 1 second, followed by a pulse lasting around 1 second, after which the circuit should remain idle until its next power on.
I've found something like this:
This seems to do what I want, however, there's no start-up delay here. Also, the pulse generated will have a slow falling edge (depending on capacitor used) - I don't know how it will affect the "button press" but I would prefer it to be digital type pulse, i.e. fast rising and fast falling edges.
This could probably be achieved with some transistors or perhaps a 555 timer... but no really sure where to start
I am new to this forum is fairly new to electronics. College 15 years ago was about the last time I delved into it!
Basically, I need a circuit to generate a delayed button press upon its power source being applied. Once the said circuit is powered on (power between 13V and 20V), there should be a delay of around 1 second, followed by a pulse lasting around 1 second, after which the circuit should remain idle until its next power on.
I've found something like this:
This seems to do what I want, however, there's no start-up delay here. Also, the pulse generated will have a slow falling edge (depending on capacitor used) - I don't know how it will affect the "button press" but I would prefer it to be digital type pulse, i.e. fast rising and fast falling edges.
This could probably be achieved with some transistors or perhaps a 555 timer... but no really sure where to start