I have a question about this NE555 pulse generator: ebay.com/itm/…

Is the output connected to ground?

I'm assuming that the circuit creates a square wave with high and low voltages. Instead of voltages, I just need continuity. I need to alternate it like a on-off switch. How can I do this? Any help is appreciated.

If I use a relay and connect it to the output, would it accomplish the task? It would be cycling a lot and I would be concerned that the relay would go bad. Any other options?

[Sorry, I couldn't resist.]

Lol

@NickAlexeev Holy crap, I wake up my computer and this is the first thing I see.

Wasn't expecting that

Can anyone help me though?

@brainiak Yes,use it in bistable mode.

Make use of the trigger and reset pins

@DanielTork Well what I'm really trying to do is have some sort of circuit that acts like a momentary switch operating at 1-5 Hz, opening and closing the circuit. To use it in bistable mode, I need to use two 555 timers (one to generate the high low pulse, and the second in bistable) right? What about using one 555 timer and a relay? Of these two options, what would you prefer?

@NickAlexeev Hmm. Think that's photoshopped

@brainiak4431 No,for bistable you can use just one 555:555-timer-circuits.com/operating-modes.html.Describe the entire circuit so I can understand clearly.

And also the fetish in question was SOT23

Great,404d link.Whatever,@brainiak4431 are you trying to use the IC as switch?If so,then you'd rather use a transistor as a switch driven by the 555.So tell me more about what you're trying to do.

Relay 1 is connected to Switch 2. When Relay 1 is on, Switch 2 will be on continuously. Problem is, when Relay 1 is on, I need Switch 2 to oscillate on and off at a rate of let's say 1 Hz.

What can I put between relay 1 and switch 2 to achieve this?

Sorry that might be confusing

Let me simply put it this way

I have a relay. When the relay is on, the circuit is complete continuously. However, when the relay is on, I need the circuit to really be complete/incomplete at a rate of 1 Hz.

So if I add a 555 timer and a transistor after the relay, it will do what I am asking?

electronicsarea.com/on-off-switch-circuit-using-555-timer

Not really sure if that is something like what I need. I don't need the manual control switches. Just need it to happen automatically.

It doesn't do the pulse like I need though.

@brainiak So you want it to happen continuously without user intervention: astable oscillator. Yeah,that's a square wave,should be what you need,but the needed frequency is very small.If you want to change the pulse,use CTRL VOLTAGE pin 5.

@brainiak4431 The pulse's frequency is set with the help of 2 resistor which will have a small value.The pin I told you about is used to control the duty cycle if I'm not mistaken.

The output of the timer in the linked schematic is ok with all the inductor, protection diode and the rest. Look at how the IC is connected for astable operation and modify the rest. Besides, that's not the standard setup: for turn off it should have been reset and not threshold.

@brainiak4431 additional clarity is need to define In/out parameters and variables if any. e.g. In= N.O. momentary switch Out = momentary 1~5Hz switch to ground (open drain or collector) variable frequency with either fixed closed time OR fixed duty cycle ( choose 1) Release of input then opens output switch at end of cycle OR abruptly (Choose 1)

hey guys, anyone has any experience with FSRs and their interface circuitry?