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  1. M

    mosfet gate drive circuit

    This picture shows a Mosfet gate drive circuit .What is the value of C1 in it? how to find this ? Help me maxim10373
  2. M

    [SOLVED] IR led and photo transistor circuit

    hello I have a small project which is need to negative switching. Is negative switching possible with IR sensor ? IR Led with photo transistor circuit readily available .
  3. M

    SMPS Switching transistor getting too hot

    hi I am trying to repair a SF-PW yamabishi make CNC sprintle control power supply. Now the smps on but,switching transistor C3150 getting too hot.The older transistor was C3148. I put C3150 instead of C3148. the datasheets are almost same . anyone have experience about this power supply please...
  4. M

    [SOLVED] Simple LED Blinking Program 8051

    Hi friends Attached here with a program file 8051 based. According to this program, all LED s are direct on when the power switched on. and off when the button press one by one I need to change the program, all LEDs are OFF when the power switched on. and ON when the button press one by one. pls...
  5. M

    Li-ion Battery charger need help

    A Lithium iron Phosphate battery voltage is 3.2v and capacity is 5000mAh. what is the charging current if I make a charger for single cell ? Data sheet said that 1C rating. if 1C =5 amp for one hour that means a 5amp charger enough ? awaiting reply maxim
  6. M

    NI-MH Battery charger circuit help

    Friends I need a charger circuit for 12x 1.2volt,2100Mah NI-MH Batteries .(14.4V) here what will the out put voltage and current for charging this 12 batteries ? which switching transformer for suitable this application ? Can you help? maxim10373
  7. M

    An1660 low-cost induction motor controller

    Hi Guys, Anyone have tried to AN1660 Induction motor speed controller? Please share your experience here. Which is the complete source code (.Hex) in this attached file ? Maxim
  8. M

    Motorola microcontroller program

    Dear all MC68331CFC16 is programmable ? any program inside of this chip ?
  9. M

    [SOLVED] Simple led on off circuit 8051

    Friends This is a simple LED on off with a push button program. can you help me to add ; when push the button more than twenty (20) seconds The LED should be OFF. regards AJAY [#include<reg52.h> /* special function register declarations */ /* for the intended 8051...
  10. M

    Glossy papper for sensing application

    Dear, I have attached an image of a pepper type reflector for sensing applications. Can you tell which type of material is this and which type of sensor sutable for This reflector . If possible make a schematic also. Thanks Maxim
  11. M

    Siemens SITOP 20 switch mode powersupply

    Hi friends I am try to repair this SMPS Siemens SITOP 20 . When I switch on the powersupply Power transistor getting blast. I changed all capacitors and faulty componants on control board The original powertransistor they used ON5134 and I trieng BUV48A. I could not find datasheet of ON5134 ...
  12. M

    Current Transformer Identification

    hi All According to this diagram, what is the rating of the current transformer ? This is a 1HP 3phase induction motor starter with over current protection circuit. thanks Maxim
  13. M

    Temperature controller PIC16f877 need some modify

    Dear .. I attached here with the c-file and circuit and the working principle is given below; Set any minimum and maximum temperature with the help of LCD display, by pressing switches S2 and S3. The maximum temperature will start from minimum temperature +10 degrees. If the temperature being...
  14. M

    Triac based AC motor speed controller

    Hi friends According to this diagram speed reducing zero to maximum. but voltage fluctuating (flickering if connect a BULB)on output. is this method possible to drive a triac ? regards maxim
  15. M

    Piezo Electric crystal cirrcuit

    Hi Dear A Piezo electric crystal generate very little current (or voltage). How to amplify this logic signal ,for work a 6volt relay circuit. regards Ajitkumar
  16. M

    [SOLVED] PIC18F452 three phase induction motor controller output fluctuations

    PIC18F452 three phase inducion motor controller out put fluctuation Hi All I have completed AN843 based 3phase motor controller and its working forward direction is perfect, but when the reverse function, output fluctuating and fault light also blinking. when I touch the reverse button or...
  17. M

    [SOLVED] Using pic micro controller with g540 programmer

    hello, I am try to burn a file with G540 programmer and its showing some messages I attached as files.I am Using PIC18F452 micro controller. Hex file loading and burning successfully but circuit not working. I also attached the hex file.please help Ajitkumar
  18. M

    IR21362 and IR2130 is same

    Hi Is it same IC IR21362 and IR2130s? Can replace IR21362 and put IR2130 In same place? Please reply
  19. M

    three phase motor circuit

    Dear I have some doubt about a 220 volt three phase motor control circuit (micro controller based) In circuit I gave 220 volt DC for three phase bridge circuit and 15 volt DC for control circuit. if I give the control ground and power ground is separate (I meant the 15 volt and 220 volt is...
  20. M

    Which Programmer Suit For NXP P87LPC 764 Microcontroller

    Hi, which is a suitable Programmer for P87LPC764 FD Is it Possible Programming Parallel Programmer? I have G 540 Programmer but I am so confusing and Lost so many CHIPS. program done with G540 but circuit not working. I check FLASH MAGIC but, not supporting P87LPC device. I can,t use any other...

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