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lm3478 sepic
Hello ,
I have some questions regarding the LM3478 from national in a sepic configuration .
On the website from national there is a schematic available that is able to drive luxeon led strings .
h**p://www.national.com/appinfo/power/LEDrefdesign.html
The description in the...
Hello All,
Thank you for the reply's but i already had that information.
I little bit my fault i should mention it in my previous mail.
Al these examples are for another kind of ucontroller and most of them use bit banged routines to implement the I2C bus.
I bought these sonar module on the...
Hello all,
I'm currently busy to build my first robot and i'm trying to program the SRF08 sonar sensor. This sensor communicates with the microcontroller through the I2C bus .
As development platform i'm using a C8051F120 kit from cygnal.
I also taking my first steps in C so i have a lot to...
Hello All,
I'm busy with writing a program that has to do the following:
I have a 16 bit value that is stored in two internal memory locations
At a certain moment i had to put the bitdata bit by bit to an IO/pin serial clocked on the rythme of an external clock connected at an IO pin (16...
Hello ,
I know that is the case with the standard microcontrollers but i m wondering if it is possible with more advanced microcontrollers/microprocessors.
I can imagine that in a real time application you can come in situations where two interrupts must be handeld at the same time.
Gandalf
Hello ,
Perhaps a stupid question but i wonder if there are 8051 microcontrollers available that can handle two external interrupts, with the same priority ,at the same time ?
This means that if two external interrupts are triggered , the software can handle two different ISRs at the same time...
Hello ,
i have to count an amount of pulses during a certain time .
I know that i can use a counter for this but the problem is that the pulstrain that i have to count has a frequenty of 10 Mhz .
With a standard 8051 microcontroller i can only count 1/24 of the oscilator frequency. This means...
propellor clock
Hello ,
I think there is a misunderstanding concerning the noise item
i mean the hearable noise that it will produce .
Sorry for this
Gandalf
propeller clock using 8051 microcontroller
Hello again ,
I forgot something in my previous posting.
My clock is working with power supply of 12 V .
and the frequency depends on the amount of windings.
In general how lower the windings how lower the frequency that you can use .
This is...
avr clock propeller
Hello ,
Sorry but i missed your links . Probabbly the replys where crossing each other i suppose .
I was wondering what the noise is that the brushes generated .
This was the reason why i looked for an alternative.
In my case 9 Khz with a duty cycle of 50 % was ok . I...
henk soubry clock
Hello Panalog,
Actually i did use a DC ventilator (brushless) to build the transformer .
The secundairy winding is wraped around the permanent magnet of the dc ventilator . The primairy lays on a cardboard cylinder or anything else that fits over the turning part of dc...
mechanically scanned led clock
Hello All ,
I´m new on this forum so this reply is a little bit late but anyway.
I just finished with building such a clock based on 80c51 microcontroller instead of a pic microcontroller . The biggest problem is to provide power on the electronic part that is...
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