Sow how are they making one go 300ft plus?

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opossum
 
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Post by opossum »

Maximum pulse width with the standard firmware is 18 uS (microseconds). There is no problem. Nothing to fix.

cubistuterus
 
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Post by cubistuterus »

<sheepish> erm, yes i sort of only read the comments on the code... :oops:

thanks for that opossum! so on average i get that the led's are on 20% of the time, (i just added up all the ontimes and divided by the total ontime+offtime) and as you point out, they're pulsed, which brings that down to a 10% duty cycle.

is that how it all works? so we can churn 800mA through these buggers no problem! assuming a battery that'll provide that kind of current! I imagine lugging a 12V lead-acid cell around in a backpack, with an IRLED floodlight and a massive electric-chair style switch. *ka-KOW*: down goes a city block! :twisted:

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caitsith2
 
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Post by caitsith2 »

I shopped out the mouser part# listing for oPossum's TVBG-EHP design.

Code: Select all

TVBG_EHP Part#     Mouser Part#             Unit Price    Total Price    Number of Units
Q1-Q9              610-PN2222A              0.18          1.62           8
LED2-LED9          782-TSAL6100             0.21          1.68           8
R1-R8              660-CF1/4CT52R470J       0.10          0.80           8
S1                 653-B3F-1000             0.22          0.22           1
C1                 80-C410C104K5R-TR        0.06          0.06           1
C2                 140-XRL10V100-RC         0.06          0.06           1
XTL1               520-ZTT800MT             0.46          0.46           1
IC1                571-1-390261-2           0.15                         1
                   556-ATTINY85V10PU        2.73          2.88           1
JP1/ICSP           517-30310-6002           0.37          0.37           1
JP2                649-71363-102LF          0.14                         1
                   538-22-28-4031           0.28          0.42           1
R10                291-220-RC               0.10          0.10           1
R9                 291-10K-RC               0.10          0.10           1
LED10              78-TLDR5400              0.23          0.23           1
LED1               78-TLHG5400              0.10          0.10           1
BAT1               12BH348-R-GR             1.14          1.14           1

---- Power supply options ----

For using the IR led power supply to power the microcontroller.

D1,D2              512-1N4002               0.05          0.10           2
----- TOTAL cost is $10.34 plus shipping plus PCB cost.

For using a seperate battery for the microcontroller.

BAT2               12BH321A-GR              0.75          0.75           1
C4                 80-C410C104K5R-TR        0.06          0.06           1
C3                 140-XRL10V100-RC         0.06          0.06           1
----- TOTAL cost is $11.11 plus shipping plus PCB cost.

nutt318
 
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Post by nutt318 »

For a PCB ive seen websites that will make a prototype board for 60 bucks or so. Can you take the board design in the Eagle format and send it to them to make?

Didnt know if this was even possible of having a company print a PCB for a reasonable price.

Just checking to see if that was a option, just taking the board design and getting one made. Has anyone else tried this?

Probedude
 
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Post by Probedude »

nutt318 wrote:For a PCB ive seen websites that will make a prototype board for 60 bucks or so. Can you take the board design in the Eagle format and send it to them to make?

Didnt know if this was even possible of having a company print a PCB for a reasonable price.

Just checking to see if that was a option, just taking the board design and getting one made. Has anyone else tried this?
This is how it's done commercially except you would typically send gerber files to the board house instead of Eagle files. Board houses can convert your files for you to gerber, but they'll likely charge you a conversion fee also.

Check out www.pcbexpress.com and www.barebonespcb.com.
Both these places will make a double sided, plated through hole, quickturn PCB for a reasonable price. The best part is that you can panelize your design so that you can get many parts out of one panel to reduce your per board cost.

If you are looking for full service boards, www.4pcb.com has a good deal where you can get 2 sided, PTH, silkscreen and soldermask for $33/ea (3 board min). Panelization (step and repeat) is not allowed for that price but for a $50 fee they'll let you step and repeat. THe sq. in per board allowable for the $33/ea price is really good (up to 60 sq in!!)

nutt318
 
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Post by nutt318 »

Probedude,

Thanks for the good info. Is there a way to convert the eagle format to Gerber?

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opossum
 
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Post by opossum »

BANNED wrote:I shopped out the mouser part# listing for oPossum's TVBG-EHP design.
Updated list with proper caps (style and lead spacing), fixed bad resistor value, less expensive transistor.

Code: Select all

TVBG_EHP Part#     Mouser Part#             Unit Price    Total Price    Number of Units
----------------------------------------------------------------------------------------
Q1-Q9              512-PN2222ATAR           0.035         0.35           10
D1,D2              512-1N4002               0.05          0.10           2
LED1               78-TLHG5400              0.10          0.10           1
LED2-LED9          782-TSAL6100             0.21          1.68           8
LED10              78-TLUR5400              0.09          0.09           1
R1-R8              291-47-RC                0.04          0.40           10
R9                 291-1K-RC                0.10          0.10           1
R10                291-220-RC               0.10          0.10           1
S1                 653-B3F-1000             0.22          0.22           1
C1,C4              80-C320C104K5R5CA        0.09          0.18           2
C2,C3              647-UPM1C101MED1TD       0.07          0.14           2
XTL1               520-ZTT800MT             0.46          0.46           1
IC1                571-1-390261-2           0.15                         1
                   556-ATTINY85V10PU        2.73          2.88           1
JP1/ICSP           517-30310-6002           0.37          0.37           1
JP2                649-71363-102LF          0.14                         1
                   538-22-28-4031           0.28          0.42           1
BAT1               12BH348-CS-GR            1.05          1.05           1

Get a few TSAL7600 (Mouser # 782-TSAL7600) if wide angle operation is desired.
Last edited by opossum on Thu Feb 14, 2008 1:49 pm, edited 1 time in total.

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opossum
 
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Post by opossum »

nutt318 wrote: Is there a way to convert the eagle format to Gerber?
That is done with the CAM processor.

BatchPCB is a good low cost service if you can wait 3 to 6 weeks.

nutt318
 
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Post by nutt318 »

oPossum wrote: Note that using 2xAA (12BH321A-GR) to power the micro will *decrease* power output.
What type of batteries do you recommend instead?

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opossum
 
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Post by opossum »

I think a single 4xAA pack is the best.

The use of two batteries is only necessary if the voltage is something other than 6V, or it can not supply enough current to stay above 4V (4xAAA for example).
Last edited by opossum on Fri Feb 08, 2008 1:40 pm, edited 1 time in total.

nutt318
 
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Post by nutt318 »

ahh, ok. I get it. Thanks.

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opossum
 
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Post by opossum »

I *think* a single 4xAA will work better than the 3V + 9V used by the SHP because AA have much more current than 9V. The only way to prove this is to build both and test them.

Using a 7.4V LiON (digital camera/camcorder) battery would be interesting also.

nutt318
 
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Post by nutt318 »

I really want to build one of these EHP because I have a neighbor accross the street that always leaves theirs blinds open and watching the big screen at night.

I think that I am right around that 150ish foot mark and cannot get it to go. Im using 3AAA's on the v.2.0 and cant get it.

Hopefully this new design will get it turned off. I want to get one built soon because in the spring time a tree will be blocking my view. Also im not sure if the tree is causing any issues currently but i doubt it.

Just now placing an order on mouser.com to purchase the parts to the EHP. I will let everyone know how it goes.

Probedude
 
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Post by Probedude »

oPossum wrote:Using a 7.4V LiON (digital camera/camcorder) battery would be interesting also.
Just received one of these also this past week to try a single lipo powered tv-b-gone.

http://www.hobbycity.com/hobbycity/stor ... oduct=4360

Very thin cell - should make for a nice thin/concealable device.

Looks like the price dropped since I made my purchase.

If I ever finish my tv-b-gone 360, that will be powered by a small 800mAH 2s pack from my RC heli.

Just for everyone else's info, fully charged lipos are 4.2V/cell.

nutt318
 
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Post by nutt318 »

Would this work for the EHP Design cutting out the extra battery and the programming header/jumper pin?

Image

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