timer to trigger latch

[mbalegria]

Thanks to this thread. I got an idea on it for my Chips

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[flippityflop1]

Thanks to this thread. I got an idea on it for my Chips

well, you can start thanking me by saying as to what components can i use for mystery components 1 and 2??

no, seriously i don't know.  ???

 

[Hero999]

I don't know, you drew the circuit. They look like SCRs to me.

Seriously, use a microcontroller, the PIC12F508 could easilly do what you want or better still save up or take a bank load to buy the propper welding mask.

 

[flippityflop1]

I don't know, you drew the circuit. They look like SCRs to me.

Seriously, use a microcontroller, the PIC12F508 could easilly do what you want or better still save up or take a bank load to buy the propper welding mask.

yep just looked the little bugger up... it's tiny.

but, i don't want to add another task in my to do list, that is, to learn to program PICs... and i don't have a PIC programmer  ???. i also have no experience at all to wiring microcontrollers.. (i'm not even that sure as to what pull-up resistors does).

at least my last design has the functionality of being adjusted manually and it turns itself off (huh!! take that!).

just ordered my parts lists online (still don't know what to use for the unknown component) whole thing cost 15 frickin dollars. that's shipping not yet included. ridiculous.View attachment 41446

 

[Hero999]

yep just looked the little bugger up... it's tiny.

What do you mean? It comes in a through hole DIP which is the same package as a 555 timer, uA741, LM393 etc.

don't want to add another task in my to do list, that is, to learn to program PICs... and i don't have a PIC programmer  ???. i also have no experience at all to wiring microcontrollers.. (i'm not even that sure as to what pull-up resistors does).

It's not hard to learn, especially if you program in BASIC.

at least my last design has the functionality of being adjusted manually and it turns itself off (huh!! take that!).

With an MCU that can be done in software without any need to change any comkponent values and the delay can be controlled pretty accurately so there's less experimentation.

just ordered my parts lists online (still don't know what to use for the unknown component) whole thing cost 15 frickin dollars. that's shipping not yet included. ridiculous.

You could bought some PIC12F508s and a cheap USB programmer for mot much more than that or saved even more money by making your own parallel port programmer.

 

[flippityflop1]

What do you mean? It comes in a through hole DIP which is the same package as a 555 timer, uA741, LM393 etc.

i wasn't sarcastic when i said that.

anyways this discussion's gone too long than it need be. locking it now.

 

[Hero999]

i wasn't sarcastic when i said that.

I know, I disagree, it's not small at all. The PIC12F508 comes in a large through hole DIP8 which can easily be soldered to strip-board. You can get it in smaller surface mount SOIC8 package which is still easy to solder, compared to the tiny DFN8 package which is only 3x2mm.

anyways this discussion's gone too long than it need be. locking it now.

Unlocked, you shouldn't be allowed to do that, it's a bug in the forum software.

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