UCD "dc" & "on"

[Moby]

I'm waiting for my UCD400 modules to arrive and in the meantime I searched a little about DC and ON circuits. Since I didn't found what I'm looking for I was thinking about this. It will be nice to hear comments about

An externally hosted image should be here but it was not working when we last tested it.

Shot at 2007-10-25

 

[Moby]

No comment? Bump

 

[m-tech]

Jesi li siguran da ovo radi ? Nesto oko Q2 i Q3 mi deluje "sumnjivo" ( mozda negde fali masa ) ? Q3 bi trebao da ima otpornik u kolektoru ( isto kao i Q2 ).
Koja je uloga onih zener dioda ? Sa njima zastita reaguje pri dosta visokom DC naponu. A sta ako dodje 15-ak volti DC ? Zastita tada nece reagovati.

P.S.
Lakse je na srpskom.

 

[Moby]

Lakse je na Srpskom ali smo "izbacili" sve ostale iz teme. Let's switch to English
If I can trust in simulation, this circuit works. Dc threshold is arround 4V and zener are keeping base voltage so every voltage above 4v works like relay switch. I don't see any problem about transistors...Maybe I'm wrong, that's why I'm asking about comment.

P.S. M-tech oslobodi opciju za slanje e-maila, da ti kazem nesto privatno ili ti mene kontaktitraj

 

[m-tech]

Those zeners are 2.3V ?
Q2 emitter ( and Q3 base ) should go to gnd.

Sada mozes da posaljes mail.

 

[Moby]

Those zeners are 2.3V ?
Q2 emitter ( and Q3 base ) should go to gnd.

Sada mozes da posaljes mail.

Zeners are 2.7V. Yes, I made a drawing mistake at Q3 base. Corrected... What about "on" circuit? I'm not sure what UCD module "expects" to be a trigger +5V?

An externally hosted image should be here but it was not working when we last tested it.

Shot at 2007-10-28