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  1. masterleous

    [Needed]: 40816229 IC Datasheet

    Hi all, i need some help, i will be very greatfull to you, one of my nephiew has a remote control toy car, which is operated at 27MHz frequency, (and ofcourse it is MADE IN CHINA) Inside the Remote Control a few components are their, 3X  S9018 Transistors Few Resistors, Inductors...
  2. masterleous

    Help me in Building a UPS

    Hello all users, I need some help in my project of UPS, i found some basic conecpt of UPS on NET, which is basically a 12 volts to 220/120 VAC Inverters, these types of circuits have a big problem with them, when a battery is fully charged, UPS give 220 VAC, after some time when Battery goes to...
  3. masterleous

    Need help in using Darlington Pair IC ULN2003A

    Hello Guys, I need some help in using ULN2003A Darlington Pair Array IC in my project, let me explain little about my project. I want ULN2003A IC to drive 6VDC Relays, and my logic inputs are CMOS, here the input for ULN ic is coming from BCD-7 Segment IC 4511, and the output of ULN2003 is...
  4. masterleous

    Want to make Auto Range Power Supply.

    Hi all, I want to make my Auto Range Power Supply like Input : 85 - 250 VAC Output : any DC Voltage like 12VDC 2-3A Can anyone have have an idea about this.? Thanks
  5. masterleous

    Want Datasheet of Large 7 Segment LED Display

    Hi, Want Datasheet of Large 7 Segment LED Display. The 7 segment ms t be of large size upto 10 to 12 inches.. Can any one have the information about it's power consumption with specification.
  6. masterleous

    Help: I want to build my own Intercom.

    Hi all, i want to build my own INTERCOM, i teseted LM386 for Audio Power Amplifier and it is working perfectly, I want a Microphone for inputing a  Voice Signal, and from net i got a simple circuit for Mic Pre-Amplifier but the problem is that Noise is so much due to That Pre-Amplifier and Audio...
  7. masterleous

    Want to use LED Dot Matrix Board

    Hi all, I want to use LED DOT MATRIX Board, I bought a newone having 8*8 LEDs, means This have 8 Columns and 8 rows, and their are only 16 pins........... ??? I am unable to use it, can anyone help me to understand how we can make letter on it. or how we can make any thing with it...
  8. masterleous

    Want DIGITAL VOLT METER for AC

    Hi, In Electroni-LAB.com a circuit is given using IC 7107, The circuit is mainly for DC Inputs only, if we want to measure AC inputs than which changes will we have to make in our cisruits. Either, a Bridge Rectifier is used with capacitor in front of AC inputs and That Circuit for DC, or any...
  9. masterleous

    How to get a CLOCK from a Crystal Oscillator

    Hi all, I want to know the procedure to get a clock from a crystal oscillator. if we want to use 1 MHz to 30 MHz crystal with necessary circuit. than how will we get it? Secondly if i want some Clock Frequancies like 1 KHz to 200 KHz and i have a 1 MHz Crstal, than is their is any method to...
  10. masterleous

    Want help in Voice & Data Multiplexing

    Hello Guys, My project is Voice & Data Multiplexing using TDM , I found a Circuit Diagram of the above project, the circuit is for Analog TDM using Analog MUX CD14051, I want to obtain Voice from SoundCard of my computer and also Data from Parallal/Serial PORTs, but my concern is to get...
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