Ping or Chime

[M0BSW]

Hi ,I want to add a ping or chime to some of my projects, when I leave them on mostly, the battery operated ones I leave it on, to remind me to turn them off. any ideas.
Paul

[strangelovemd12]

A 555 in one shot mode to set off a buzzer/light/etc. a predetermined time after power on or after last input.  Or a fire-breathing dragon.  The lack of details make it difficult to tell which is more suited to your application.

[Sasja]

yeah, it probably depends on the kind of project, so what are you making exactly? Maybe you could also make your circuits switch off automatically, or go into some low-power mode?
a fire-breathing dragon would do the job i guess.

[M0BSW]

A 555 in one shot mode to set off a buzzer/light/etc. a predetermined time after power on or after last input.  Or a fire-breathing dragon.  The lack of details make it difficult to tell which is more suited to your application.

A 555 in one shot mode to set off a buzzer/light/etc. a predetermined time after power on or after last input.  Or a fire-breathing dragon.  The lack of details make it difficult to tell which is more suited to your application.

  I have built a function generator which is battery powered, that one of the projects, the other which I continuously  forget is the soldering station, I tend to solder for about 1/2 an hour then forget the bugger is still on, that just a couple of the things I'd like to have some control over, I like the idea of it switching off.

[Sasja]

Adding some  auto-sleep or shutdown feature to your battery powered function generator circuit would make sense,
hacking your soldering station to add a such a feature could be fun too (and maybe keep your house from burning down)
I assume you're after a learning experience instead of just wanting it to happen now?
googling "soldering iron auto shut off" gave me this link:
http://homemadecircuitsandschematics.blogspot.be/2013/11/automatic-soldering-power-shut-off.html
i'm sure you'll find plenty other examples. If you just want the feature, buy a soldering station with the feature.

[AndyC_772]

There's a really nice 'ping' generator circuit on the front panel of the old Tektronix TDS5xx (and similar) series scopes. Have a look around for "TDS520B Component Service Manual", page 351.

[M0BSW]

Adding some  auto-sleep or shutdown feature to your battery powered function generator circuit would make sense,
hacking your soldering station to add a such a feature could be fun too (and maybe keep your house from burning down)
I assume you're after a learning experience instead of just wanting it to happen now?
googling "soldering iron auto shut off" gave me this link:
http://homemadecircuitsandschematics.blogspot.be/2013/11/automatic-soldering-power-shut-off.html
i'm sure you'll find plenty other examples. If you just want the feature, buy a soldering station with the feature.

Yes your right , sounds like you know me to well, I want a basic idea then learn from it and put my own teist in it 

[M0BSW]

There's a really nice 'ping' generator circuit on the front panel of the old Tektronix TDS5xx (and similar) series scopes. Have a look around for "TDS520B Component Service Manual", page 351.

Now that's a good idea, thank you Andy, I'll have a search around