Search results

  1. A

    Inverter Modifications

    Upload your transformers Or use a much bigger transformer For example like this
  2. A

    Anyone ever build a DC to AC inverter ? Needs to run on 32v DC

    Try this But i am not sure that it works or not I am not a good electronic student
  3. A

    Atx modify help me

    AnalogEL thanks for information I regulated my voltage from 17v to 14.4 And it works fine But i have another problem: I need current limit I designed current limit circuit Voltage 14.4 Current limit :5a When i load lower load than 5amps It works fine But when i load higher load than 5amps...
  4. A

    Inverter Modifications

    If you want to take 220ac from your inverter in crt,you have to add this circuit. It converts 310vdc to 220ac Apply this You have 300vdc so you dont need ic1 and components around ic1
  5. A

    Inverter Modifications

    If you remove inverter output bridge diodes , inverter outputs 310 vac 50 khz squarewave It never outputs 220vac 50 hz
  6. A

    12v battery charger circuit

    I made this circuit It outputs 16v with no load ,with load 13.8 It can handle 200watt For current limit i put 0.1 Rsense resistor for 10amper Rsense drop voltage to pin 16 pin of tl494 and from ref 4k to 1 k to gnd for 1v to 15pin Problem is that when i pul a load whose resistance...
  7. A

    12v battery charger circuit

    In figure 9 5v/10a=0.5ohm If we put a load with 0.3ohm to this circuit,what happens? 5v/0.3ohm=16.66a Can This circuit always give 10a to this load and does circuit work fine?
  8. A

    12v battery charger circuit

    Hi to all My car battery is 55A lead acid battery.I want to charge my battery with smps battery charger with tl494 Battery charger can only outputs 10a, 14.4v But i want 4a to charge battery Have you got any battery charger circuits based on tl494 Please share them if you have
  9. A

    Atx modify help me

    I modified 12v of PS but its max output 13.5 with no load ,with load 12.7 Steve Let's imagine We have 17v power supply with no feedback control and we need modify it from 17v to 14.4 v Have we got some way to do it Feedback control or other ways Thanks in advance Steve
  10. A

    Atx modify help me

    Hi to all I want to modify atx power supply to battery charger which gives 14.4 v 1-7A How to do this I have done this but there is a problem : I rewound transformer windings to 5 turns Original turns were=4 for 12v Then i check output voltage is 18v with no voltage control When i load a 12v...
  11. A

    Output voltage regulation help me

    Thanks . But I say : Only one output 50v 3a Input voltage 140-150v Efficiency 80% Transformer wingding Np:40t Ns:19t No auxiliary windings Pwm:tl494 Operation half bridge If output is 50v,can i make adjustable voltage from 3v from 50v with FEEDBACK control Work I made I put potentiometer to...
  12. A

    Output voltage regulation help me

    Hi to all If smps power supply output voltage is 50v, shall we decrease any voltage (for instance 25 or 15v) with feedback control. If So , what happens in circuit Will power supply work fine or not ? Thanks in advance
  13. A

    Need with homemade inverter with tl494

    Thanks
  14. A

    Need with homemade inverter with tl494

    Thanks for useful information Please say to me what output current belongs to? And output voltage drop? If you have good circuits about inverter with full information , please send me it Thanks in advance
  15. A

    Need with homemade inverter with tl494

    Thansk for all information Output voltage : 300vdc Transistor: IRF3205 Output capacitor :400v 47uF Supply : 12v 60A car battery How to connect 0.1uF Please help me I couldn't use two error amplifiers in ic Are Two error amplifiers very important for this problem or not Transformer EI33A I think...
  16. A

    Need with homemade inverter with tl494

  17. A

    Need with homemade inverter with tl494

  18. A

    Need with homemade inverter with tl494

    I am new here. I made inverter 12 v to 220vdc with tl494 but when i connected a load (resistor)with 260 ohm to output side ,output voltage dropped down from 300 v to 100v Please help me I need 300 vdc without load and with load Ic : tl494 Operation pull -push Frequency 33 khz Transformer...
Top