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Why not power the circuit from the load side, and 'kick-start' it with a pushbutton when the battery is charged. To make the driver hi-z, just add a transistor, a resistor and invert the comparator output. This should make a stable off condition, the transistor will release the gate when power disap...

Hi Dacflyer,
Have you received the display yet?

TOK

PS: 57mm = 2.24"

<small>[ March 11, 2006, 02:31 AM: Message edited by: Gorgon ]</small>

Hi, I don't know if this is relevant, but once, many years ago, I designed this type of product based on a chip from Fujitsu, the MB88324AP. I think this is more or less obsolete today, but I found a modern version, and much more advanced, the MB90050 here: http://edevice.fujitsu.com/fj/DATASHEET/e-...

Hi DAVID,
I found this catalog in Thailand. It states that the spep plus needs 10VDC, but no amps. I hope this helped!
http://www.etteam.com/catalog/Catalog2004/Page50-55.pdf

Middle of page 51.

TOK

Hi,
I know of gallstones, and they ar not the same as kidney stones! Had to remove my gallbladder because of the stones. I don't think you do the same with kidneys

TOK

Hi Dacflyer,
I would suppose that this is a high voltage variant of the ULN2003 chip. Like this ULS2803 version is with the ULN2803, with one driver more (8 vs 7). http://www.allegromicro.com/sf/2801/

TOK

Hi, I would think a small thermostatic switch and some form of heater/lamp solution is the best here. The thermostat comes on when the ambient temperature is around 32F/ 0C and keeps the temperature inside the relay at this level. If you want to seal the unit hermetically you have to do it under ext...

Hi Dacflyer,
I sent it to earthlink, thats the one in your profile.

You can email me via my profile to send me a functional email address.

TOK

Hi Dacflyer, The STK403-130 is listed as present on this Sanyo website http://service.semic.sanyo.co.jp/semi/eng/search/search_num.asp?class1=PSEARCH&req=f&textfield1=STK403-130&popupinclude=0&textfield2=&popupand=1&status3=present&preview_count=50&ro w_count=1&di...

Hi Shaynes, First of all, I'm no expert on this. I can recall having seen a double horn setup for both horizontal and vertical polarisation. This was a rather long contraption. It might be that your disc setup is for a general reception system. Just an idea :) TOK ;) <small>[ February 17, 2006, 02:2...

Hi m2mike, If it is only the signal you want, you could also use an optocoupler to transfer it galvanicly isolated from the power grid. If you use a normal optocoupler, the output would be halfwave rectified to 60Hz. You would of course need to protect the led in the optocoupler from the reverse vol...

Chips? http://www.1sourcecomponents.com/search/search.htm

Datasheet: http://pdf1.alldatasheet.co.kr/datashee ... R2242.html

TOK

Hi Al, Yes, this was my concern. I know the PIC's are protected against brownout, but when it happens the functionality of the circuit must be designed for this, both regarding the battery load/ overload and the return to a safe state for the driver electronics, when this happens. I think one of the...

Hi Dacflyer, I suppose this is not an alternative either, but here it is. The price is in NOK. http://no.farnell.com/jsp/endecaSearch/searchPage2.jsp?Ntt=hdsp3900&Nty=1&N=401&Ntk=gensearch I could buy one for you, together with a company order(or the postage would kill the deal), let me ...

Hi Al,
I think this might be an issue:

4. How to protect the PIC from brownout when cell V drops? I suppose the PIC is powered from the same cell?

TOK