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    India&Pakistan GSM/GPRS module

    dont know any one selling in Pakistan but many people in Pakistan buy from China like the SIM300 module.
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    waking up circuit at particular voltage

    Voltage Hi all I have an RSSI output from my receiver. I would like to wake up the rest of the circuit when the RSSI output voltage goes above 0.6V. This voltage is uaually 0.4V and can go upto 1.5V. The system is running on a 3V supply. So I want to convert the voltage as follows 0-0.6 Volts...
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    My R & D with PICmicro 18F2320 to generate OSD

    18f2320+pll well done.. keep us posted good luck
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    another 1v to 5v dc-dc. please help

    1v to 5v step up I have setup a board with a similar device to that of MAX1674 from Linear Tech Problem is that they require quite a large and variable input current which my tiny solar cell cannot provide and thus the device fails to start up. for Prototyp_V1.0: can I use a 32khz squarewave...
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    Capacitor Selection - ceramic and electrolytic capacitors ?

    Re: Capacitor Selection Originally Tantalums were used as they were the smallest size. HOwever, ceramics are much better and now that they are smaller they should be used instead if possible plus they are cheaper (i think)
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    Capacitor Selection - ceramic and electrolytic capacitors ?

    Re: Capacitor Selection I do not see any reason why you cant use these. If you are trying to achieve very low noise system, especially near ADC you can use multiple decoupling capacitors, my chain is usually 10uF, 100nF and 100pF to achieve low noise.
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    another 1v to 5v dc-dc. please help

    dc voltage 1v to 5v Hello These have been discussed here before but my application is a bit different. I want to generage 5V from 1V. However my source is a solarcell and th output is a few milliamps, usually between 1 and 5mA. I want to use this to top-up a rechargable battery, however due to...
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    looking for circuit diagram for 27mhz, 40mhz, or 49 mhz RC

    40mhz am transmitter circuit ok thanks I understand it better now. The other line is just to turn the modulator on / off
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    where to find part: 40.680mhz xtal

    where to find part: 40.680mhz xtal mostly used in RC tranmitters/recievers, remote door bells, etc cant find on farnell, or digikey
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    How to test and measure an antenna radome?

    Re: Radome Measurement Hi Amir place the antenna on a VNA and compare with or without radome. If the filter frequecy of antenna moves after placing the radome, you may be able to enlarge,redce the size of the antenna to compensate for the loss and bring antenna backinto frequency with the...
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    Please help me,PDArobotics problem ????

    maybe you can find HSDL-7001 IR 3/16 ENCODE/DECODE IC and HSDL 3612 in Vietnam. try these
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    looking for circuit diagram for 27mhz, 40mhz, or 49 mhz RC

    scheme transmitter 49mhz thanks radio head. can you explain to me the two inputs B3 and B2 pins on the micro. As far as i can understand, PCM PWM both require only one digital input (i.e the data stream). so what is the other input for? thanks
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    looking for circuit diagram for 27mhz, 40mhz, or 49 mhz RC

    circuit diagram of rc helicopter Hi I am trying to make my own transmitter that should work with 40MHZ OOK reciever for RC helicopter. I have found this circuit from net. https://www.webx.dk/rc/xtwin/convert17012006.gif but i dont understand this well or how to conver it to 40mhz. can some...
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    Looking for DAC and ADC

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    Looking for DAC and ADC

    Hi I am running a circuit with +5V. Is there a DAC that will provide +1 to -1 Volts at 10 bits and an ADC to convert this +1 to -1V to a readable value? Regards
  16. T

    +5V to -5V conversion of powered supplied vis USB

    hi all i am designing a micro controller circuit that is powered by usb. but some of the functionality need +5 to -5 volt range while usb provides only +5 volt, is there an easy way to convert the +5 to -5 volts as well?

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