l.o.v.e PICNIC

 

fini.

ak

 

ak: You made me laugh with your comments today.

As opposed to:



https://en.wikipedia.org/wiki/User_error

LOL ....

 

fini.

ak
View attachment 126693

 

Several times - I've posted a hand trace of a dusklight outdoor communal lighting unit.

Cadmium sulphide LDRs are becoming scarce

https://www.digikey.com/products/en...ors-photo-detectors-cds-cells/540?k=photocell

 

View attachment 126707

I would use a BPW34 photodiode, more sensitive to daylight ignores background streetlights.

http://www.mouser.co.uk/Search/m_Pr...conductors/BPW34/&qs=5N7VPDfziMSKXPRYeLTZOQ==

 

fini.

ak
View attachment 126693

√ Approved

 

I would use a BPW34 photodiode, more sensitive to daylight ignores background streetlights.

http://www.mouser.co.uk/Search/m_ProductDetail.aspx?Vishay-Semiconductors/BPW34/&qs=5N7VPDfziMSKXPRYeLTZOQ==

Would you please post some datasheets justifying your claims and a schematic showing your solution?

 

http://www.vishay.com/photo-detectors/list/product-81521/


http://www.vishay.com/product?docid=81321

 

http://www.vishay.com/photo-detectors/list/product-81521/


http://www.vishay.com/product?docid=81321

Well, yes, of course.
I gleaned that from your earlier post, but was more interested in doing a side-by-side comparison with that part versus an LDR of your choosing, and in seeing how you'd implement the diode solution in a way that was superior to AnalogKid's use of an LDR.

 

Well, yes, of course.
I gleaned that from your earlier post, but was more interested in doing a side-by-side comparison with that part versus an LDR of your choosing, and in seeing how you'd implement the diode solution in a way that was superior to AnalogKid's use of an LDR.

I use the TEPT5700 the time in photo sensing, best thing going, totally ignores street lights, and incandescents,.

 

I use the TEPT5700 the time in photo sensing, best thing going, totally ignores street lights, and incandescents,.

According to this:


There's a pretty good match between your phototransistor ( which isn't the photodiode you touted earlier) and CdS below about 700 nanometers, so I don't understand where the advantage lies over CdS since it'll respond about the same to street lights and incandescents, but won't reject wavelengths higher than about 700 nanometers any better than CdS will.

How about a schematic of your widget so we can see what's going on with it?

 

Dear All,
Today I finally got the PCB and populated the board to find it working good. I thank you all for the support and active exchange of ideas and for pointing me in the right direction. Thanks again.
Will keep in touch.

 

Where are you located?

ak

 

Where are you located?

ak

Hyderabad, Telangana, India.

 

Guys,
Greetings.
I have noticed that the 4093 in my cirucit is slowly getting warmer over a period of 48 hours. I am operating at 12 v DC regulated voltage. All unused pins are connected to GND. Any pointers?

 

You have 2 gates left over. You can parallel the inputs/outputs of 3 gates (U1B) to drive the FET and see if it makes a difference. Add a 200 ohm gate resistor/

 

I have noticed that the 4093 in my cirucit is slowly getting warmer over a period of 48 hours. I am operating at 12 v DC regulated voltage. All unused pins are connected to GND.

All unused ***inputs*** should be connected to GND. All unused outputs must be left floating. A grounded output that is trying to pull high will overheat the chip.

ak

 

All unused ***inputs*** should be connected to GND. All unused outputs must be left floating. A grounded output that is trying to pull high will overheat the chip.

ak

Thanks AK, removed the pin and put it back on. Will provide feedback.

 

All unused ***inputs*** should be connected to GND. All unused outputs must be left floating. A grounded output that is trying to pull high will overheat the chip.

ak

Wow!! Totally missed that. Outputs connected to ground!

Inputs on the other hand should in the limit be connected to the state that draws the least amount of power.
It isn't essential that ground be used. You might chose +V over ground because of layout issues