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masterleous

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Everything posted by masterleous

  1. Thanks Hotwaterwizard.............alot for the datasheet and other information related to this IC..........
  2. 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, Capacitors................ and of course their is one IC (14 pin), The printed numbers on In are TX-2 40816229 I try to search about this IC, at first i thought it is a CMOS IC of CD4081.......but found me wrong........... as CD4081 - pin 14 is VCC and pin 7 is Ground........ And at this IC (mentioned above) has -ve supply connection of Battery at pin 14....... I am so much confused about this IC, if anyone knows about it, having datasheet of it................ Thanks, masterleous
  3. No reply from any user............ :'(...................
  4. 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 its 50%, than UPS give 180-190 VAC, and when battery goes to it minimum, UPS give less than 160 VAC. So UPS is only efficient when battery is fully charged. I found some ideas from net of UPS continuously giving 220 VAC till battery goes to 30-40%, but not find any circuit of that type of UPS. Any circuit idea/schematic.......... Thanks, masterleous
  5. 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 connected with 7 Relays, The relay's Normally Open Contact is used to drive 200V Circuitry. Please help me what is going wrong.......... Any new idea will be helpfull for me. Thanks
  6. Thanks all for your replies, but i need some more help about switch mode power supplies.
  7. I know that many electronic devices have auto range power supply. But, i want to make my own Power supply, just like a project of 0-30V Variable Power Supply in This site. Can anyone know about it. Thanks
  8. 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
  9. 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.
  10. Hi, Try to check out a datasheets of two ICs 7107 and 7106......both will be used ot measure Temp....... one ic 7107 use +5 and -5 supply and other use 9V.........so u can get 5v and 9V from a 12v .........by Voltage Regulated Ics........just like 7809
  11. Hi Kevin, you are right that it is difficult to program through Assembly Language...........but for complete automation u needed a design that perform an operation for control by its own calculation not by HMI............... Although for beginner, this is a better idea to make C Prog at first than switch to Automation through MicroProcessor or Microcontroller which is depend on user and it's robot application.......
  12. Hi, Yes u are right........ I want some help to drive LEDs.............can anyone have any idea........ I think the minimum frequency for driving it should be greater than 5-10 K Hz...........am i Right?
  13. Hi audioguru, Thanks 4 ur Kind Reply...... 1. I am using Electric MIC 2. & 4. I am using circuit for LM386 which is mentioned in it's Datasheet...........n also using a 10Uf cap in between 1 & 8. Noise is coming from MIC Circuitry, as i tested LM386 necessory circuitry from my SoundCard output and it is working properly without noise. 3. Power supply is 9v to 12 v. 5. Distance between person and MIC is normal 3-7 inches from MIC.
  14. 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 Level is so much low. Can anyone tell me the right thing to take input from MIC, and which will outputed from Speaker through LM386. I want only Mic Pre-Amplfier Circuit working properly, the rest of circuit (For Output) is designed and working. Thanks
  15. Hi, U need a menu builder or u want to make ur own menu in C or V.Basic Language.................u need to visit www.planet-source-code.com The best site for Programmer Discussion and it have many sample code. It has a section for upload......in which u can upload your own code for other Programmer...... Hope you will find your solution. Bye
  16. Hi audioguru n MP, I try to locate the pin no.s of 8*8 LED Dot Matrix Board n got success. There are total 16 pins. 8 pins for 8 column and 8 for 8 rows. The 8*8 LED Dot Matrix is look like as below...... - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Let us assume that '-' is a LED, Let for Example i want to display Capital Letter 'N' than it will just look like * - - - - - - * * * - - - - - * * - * - - - - * * - - * - - - * * - - - * - - * * - - - - * - * * - - - - - * * * - - - - - - * For this purpose i have to make LOGIC HIGH for Entire Column 1 & 8. And Other Single Line which is a DIAGONAL..... 6 separate Column and their respective rows will be LOGIC HIGH. But the problem i am facing in doing this all Column and ROWS will be LOGIC High and golw all LED (8*8) instead of Letter 'N'. My question is that could we required any Latching Circitry for this or any Special Driver IC, than plz give the full detail....... Thanks, masterleous :)
  17. Thanks audioguru & MP, I tried this method on it, and it was working.............but the problem is that i want know the exact order......mena s just like a 7 segment which has pins like a b c d e f g h..............i want to know the exact pin location of this 8*8 matrix led........i tried to search it on google but i found a 5*7 matrix led instead of 8*8........... can anyone send me a link or any helpfull material about 8*8 sequance........and how i can show a Letter on it..........i get the pins connection for 8*8 by head and trial method..........but unable to display a character......... Thanks
  18. 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.......... :'( Thanks in advance 8)
  19. Thanks audioguru, I will try CD4060 as you suggested. But audioguru using Microcontroller is not a cheapest way to get a clock. I am trying to make a square wave Oscillator, if i get success than i will put that logic in this forum toooo.
  20. 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 other approach.
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