If that's what you want, then remove the connection to pin 7 and connect a small diode (e.g. 1N4148) across the 100kΩ resistor (anode towards pin 6).He probably wants the 555 to work ONLY for the first time.
Hello,Hi.
I attached ne555 circuit.
I push 2pin switch, There is output on 3pin and stop output.
If I push switch again, ne555 works agian.
But I want to make ne555 work for the first time.
Is it possible??
Yes, I just realized that my simple modification will cause the output to go high whenever the TRIG input is low, even though it won't stay high after the TRIG input goes high, so the trigger input needs to be disabled after the first pulse.The circuit below disables the pushbutton after it is pressed once and timing begins.
everything is possibleIs it possible??
Of course thats not a resetable circuit unless one breaks the feedback loop. OrHere is a one-time use only circuit.
Press the button and the output goes and stays high.
View attachment 197548
i don't have a problem with that . . . if there's nothing to do just start a linear voltage regulator or reference or CC or SMPS design from scratch and see what's coming out of that . . . if you just wait - nothing happensSince the TS hasn't been back since his original post, we may be just spinning our wheels.
HiHi.
I attached ne555 circuit.
I push 2pin switch, There is output on 3pin and stop output.
If I push switch again, ne555 works agian.
But I want to make ne555 work for the first time.
Is it possible??
Thread starter | Similar threads | Forum | Replies | Date |
---|---|---|---|---|
Using two Ne555 to make 8 pulses at 40kHz | Homework Help | 0 | ||
M | NE555 ic getting hot and servo doesn't work | Digital Design | 3 | |
Tube Preamp - NE555 | Analog & Mixed-Signal Design | 27 | ||
YAG 555 help | Digital Design | 6 | ||
NE555 pulsed IR emitter 36 kHz : strange spurious signal at the ouput | Digital Design | 24 |