Search found 28 matches

by erkanyigiter
Fri Nov 04, 2005 11:59 am
Forum: General Discussion
Topic: Dielectric Heating
Replies: 4
Views: 824

Re: Dielectric Heating

Dielectric heating.
Heating of non-conductive materials..
by erkanyigiter
Fri Nov 04, 2005 9:18 am
Forum: General Discussion
Topic: Dielectric Heating
Replies: 4
Views: 824

Dielectric Heating

Hi all,

I am looking for information about dilectric heating. Any information, circuit schematic, link.. etc. would be very appreciated.

Thanks..
by erkanyigiter
Fri Nov 26, 2004 12:17 am
Forum: General Discussion
Topic: Meddling with USB
Replies: 6
Views: 1377

Re: Meddling with USB

i advise you to use FT245 from FTDI chip.
it is a parallel to USB converter. you could find sample circuits and free drivers from the FTDI's web page.<p>-Erkan
by erkanyigiter
Tue Nov 09, 2004 1:49 am
Forum: General Discussion
Topic: touch screen technology
Replies: 4
Views: 799

Re: touch screen technology

that link may be usable for you. <p>http://pdfserv.maxim-ic.com/en/ds/MAX1233-MAX1234.pdf
by erkanyigiter
Mon Nov 08, 2004 12:01 am
Forum: General Discussion
Topic: voltage selector
Replies: 11
Views: 1607

Re: voltage selector

Dale, Thanks for your helps, i did a simulation and i found the values as drawing below. for 12V, the output voltage is 9.791V. it could be harmful for my converter. because it was designed for 12V +/-%5. 9.7901V is very small for it. what is the reason of voltage dropping? is it possible to increas...
by erkanyigiter
Thu Nov 04, 2004 9:46 pm
Forum: General Discussion
Topic: voltage selector
Replies: 11
Views: 1607

Re: voltage selector

Dale, i am waiting for your post and i want to remind something. when the input is 24V we don't need 34mA base current for 5A because when the input is 24V it will be forwarded directly to output. i mean Q1 is off. but when the input is 12V, Q1 will be on and the collector current will be 10A max. s...
by erkanyigiter
Thu Nov 04, 2004 4:00 am
Forum: General Discussion
Topic: voltage selector
Replies: 11
Views: 1607

Re: voltage selector

hello Dale, i have tried to draw schematic as you explained. i want to learn if the drawing is true. also are the resistor values important? thanks,<p> http://s01.imagehost.org/0332/selector2.JPG <p>[ November 04, 2004: Message edited by: yigiter ]<p>[ November 04, 2004: Message edited by: yigiter ]...
by erkanyigiter
Thu Nov 04, 2004 12:41 am
Forum: General Discussion
Topic: voltage selector
Replies: 11
Views: 1607

Re: voltage selector

as you said i have a printer that runs on 24VDC and i want it to run with either 24 or 12 volts applied. And i don't want to have to select it, i want it to deal with it automatically. also my dc-dc converter is only for 12VDC +/-%5 input. so i mıst keep 24VDC off my converter. i know i can do it us...
by erkanyigiter
Wed Nov 03, 2004 10:23 pm
Forum: General Discussion
Topic: voltage selector
Replies: 11
Views: 1607

Re: voltage selector

hello again,
i have posted a block diagram to make more clear. i've painted the needed circuit in blue. also the the needed circuit must be avaliable for high current(5Amp for 24VDC and 10Amp for 12VDC)
tahanks for your helps..<p>Image
by erkanyigiter
Wed Nov 03, 2004 6:22 am
Forum: General Discussion
Topic: voltage selector
Replies: 11
Views: 1607

voltage selector

hello, i am looking for a circuit which switches according to input=12V or 24V. i mean, if the input is 12V, it will forward the input to A, if the input is 24V, it will forward the input to B. i know, i can do it using relay but is there a way to achieve it without of using relay?<p>(look like a mu...
by erkanyigiter
Wed Oct 27, 2004 2:31 am
Forum: General Discussion
Topic: Timer Question
Replies: 18
Views: 2671

Re: Timer Question

i don't know the optimum solution, but you can achieve it using a microcontroller if you have a little experience with it. connect the output of light sensing circuit to the microcontroller and track that pin. when the output is active, start the timer and at the end of the time, switch the main vol...
by erkanyigiter
Fri Oct 15, 2004 1:56 am
Forum: General Discussion
Topic: dc-dc converter
Replies: 6
Views: 1049

Re: dc-dc converter

i have found a datasheet about National's LM2588. it is a 5A flyback converter and you can use it as a boost regulator. it has a circuit drawing for 12V to 24V boost regulator (Figure 38)but it is for 1A current. maybe you can help me to increase current value for 5A. it has not got any information ...
by erkanyigiter
Tue Oct 12, 2004 4:27 am
Forum: General Discussion
Topic: dc-dc converter
Replies: 6
Views: 1049

Re: dc-dc converter

the real project is that: i have a power supply who supplies 24V from 220VAC and i want to charge my 12V battery with it. but also i want to use the charger in my car, so if i am at car and so if i can't use my power supply, i want to charge my battery with "12V car battery". i mean, it will be comp...
by erkanyigiter
Mon Oct 11, 2004 10:56 pm
Forum: General Discussion
Topic: dc-dc converter
Replies: 6
Views: 1049

dc-dc converter

how can i convert 12V DC input to 24V DC output. it also must deliver up to 5A. i have searched but not found an IC. is there anybody who can help me?
by erkanyigiter
Fri Oct 08, 2004 2:07 am
Forum: General Discussion
Topic: Current source
Replies: 64
Views: 11900

Re: Current source

windmiller:
i want to ask two question about your drawing.
1)what is the equation about current?
i=Vin/Rsense?
2)How can i find difference amplifier that you mentioned.