can anyone please point me to a circuit that I can use to stretch the
on time of an LED when the on pulse is small? I have a push botton
that I want to press momentarily and see a longer (say 1 second)
illumination of the LED.
Fundamental Limits to Curts Nets ... For now that means pointing out some fundamental limits... Imagine an xor circuit with the output fed back into one of the inputs (so ... generate output pulses until a new pulse arrives on the input line. ...Biological neural nets do not have that problem. ... (comp.ai.philosophy)
Re: coutdown 555 timer values? ... >> The tricky part is shortening up that first 555 pulse in astable mode ... >will begin the first timing cycle at about 1/3rd of the total voltage,... which will make the circuit insensitive to ... >> forces all of the inverting inputs to the comparators lower than ... (sci.electronics.basics)
Re: coutdown 555 timer values? ... >>>counter and using 555 to generate a 30 sec pulse seems like a good idea. ... In this circuit we use six comparators with references derived ...John Fields... (sci.electronics.basics)
Re: watering system, second attempt. ... >>after the comments on my first version, i've redesigned the circuit using ... It's meant to send a 1s 13A pulse through an electromagnet at the ... The tank is normally empty, with the magnet holding the ballcock shut ... the valve latches shut again, and then the tank drains slowly through the ... (sci.electronics.basics)
Re: 555 timer questions ... >The first is an RF switch circuit with an NPN transistor and resistor ... >The second a simple sensor circuit again with a transistor/resistor ... >based low voltage alarm circuit which might do if I eliminate the LED ... >I understand that the 555 needs a negative pulse and that all three ... (sci.electronics.basics)
