I need to turn a TV out of standby automatically upon power up.
There`s an LED that comes up, upon power. When the standby button is pressed, the LED flashes a couple of times (about 0.5second intervals) then when the tv fully turns on - the LED is off.
So I hope to be able to do something like this:
555-oneshot, that pulses a relay to `press` the standby button, once pin 2 is triggered.
but I want it to `ignore` the LED signal (trigger) after initiated, until power loss (or at least until the LED goes off).
I cant think how to get the 555 to ignore a signal permanently - or until the trigger is off after its triggered.
The other thing is that the LED will then produce a high signal when on - so the trigger will be high, where as the 555 likes a low trigger.
Any help please!
There`s an LED that comes up, upon power. When the standby button is pressed, the LED flashes a couple of times (about 0.5second intervals) then when the tv fully turns on - the LED is off.
So I hope to be able to do something like this:
555-oneshot, that pulses a relay to `press` the standby button, once pin 2 is triggered.
but I want it to `ignore` the LED signal (trigger) after initiated, until power loss (or at least until the LED goes off).
I cant think how to get the 555 to ignore a signal permanently - or until the trigger is off after its triggered.
The other thing is that the LED will then produce a high signal when on - so the trigger will be high, where as the 555 likes a low trigger.
Any help please!