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  1. keron

    Post DAC(reconstruction) filter for NOS DAC

    I am here with this DAC design with PCM1704 and the standard circuit provided by BB. As you can see in their datasheet.(Page 9) http://www.ti.com/lit/ds/symlink/pcm1704.pdf But I do not think they did justice with the DAC chip by throwing a simple post DAC filter in the Typical application...
  2. keron

    N JFET Alternative for 2SK369BL/2SK363BL

    I am searching for possible equivalents to use with this circuit. http://www.teddypardo.com/Resources/SuperTeddyReg.html The purpose is to power a DAC with estimated current need of 1.5A at the maximum. They are low noise Nchannel JFETS. Being low noise is critical for the application I believe...
  3. keron

    help with a relay in 640p phonostage

    Hi, I was recapping my cambridge audio Azur 640p (hypnotoad mode)with bipolar capacitors as the initial change. Everything went fine. Then I changed the 100uf capacitors near the regulator ICs as the second step.Everything worked fine for few minutes then no sound from any channels. I looked...
  4. keron

    LOW -PASS filter for cleaner AC power supply

    Hi all, I came across the advertisement about Pangea P-100 powersupply for cambridge audio 640P phonostage. The manufacturer claims that it make the DACs/phonostages sounds better by incorporating a LOW-PASS filter at 12VAC output from this PSU.It also has DC supply but it is the AC out that...
  5. keron

    negative ioniser

    ;D Thank you hero. do you think the original circuit for CFL inverter would work ok? or the latter one is best  ::). How much voltage should be there at the tip of the needle to make those dust particle neutral?
  6. keron

    negative ioniser

    Hi all, I am looking for a circuit that operates in 9-12 DC and will generate voltage in 2-3KV range with negiligible current. I came across many designs but interested if anyone knows any circuit that uses common step down transformer with primary and secondary reversed as the first step in...
  7. keron

    Voltage Multiplier

    are u sure you want to multiply to 200v or 2000 volt..
  8. keron

    AC signal for water level monitoring

                                  i have a better circuit zombie,  for water level monitoring .please search for "water level monitor for pumps" in the forum posted by myself...and practicaly it is not possible to fabricate screw driver like things for electrode.how will u connect wires to it...
  9. keron

    AC signal for water level monitoring

    I am using simple metalic probes for water level monitoring now.using AC will prevent electrolysis of probes.any one can suggest the method for this.also help me with conditioning the ac signal to dc voltage to use with logic circuits.                               will this circuit in the...
  10. keron

    WATER LEVEL MONITOR FOR PUMPS

        http://www.uoguelph.ca/~antoon/circ/sensor3.htm how to modify this for my use... or any idea to make ac signal for sensing water level?and then make it work with logic gates.
  11. keron

    WATER LEVEL MONITOR FOR PUMPS

    i found out the problem finally.it was not the circuit.it is perfect.the probe was defective.it was made of paper clips .it got corroded and made electrical contact through the mixture of rust and the glue i used to fix it.i changed into a brass electrode and a silicone adhesive.now i guess no...
  12. keron

    WATER LEVEL MONITOR FOR PUMPS

    ok if i use a 500k resistor through which i connect a NPN transistor as a switch to the output pin it should work fine rt?                                 i think the powersupply is also a problem.i get shock from the neutral wire in my home.can it be a reason for my logic gate...
  13. keron

    WATER LEVEL MONITOR FOR PUMPS

    the modification is i have used red and green LED S in my first diagram.i have not used them in the original circuit.it was only in the theory part i used the LED.WHEN I USED IN MY REAL CIRCUIT NOW .The  circuit  malfunctioned.please see the diagram.there is some serious problem with the current...
  14. keron

    WATER LEVEL MONITOR FOR PUMPS

    but what about my other questions?please help
  15. keron

    help with the circuit diagram

    in the same  circuit please someone tell me( http://www.zen22142.zen.co.uk/Circuits/Alarm/water_lev_alm.htm why there is a 1Mohm resistor with 1uF cap inbetween the logic gates ,also the 47k and 10nF cap.please ?                                 what they are for and are they necesaary for...
  16. keron

    WATER LEVEL MONITOR FOR PUMPS

    i have made some modification in the circuit.i am using two Metal oxide varistors .one for protecting relay terminals from arcing and the second protects the entrie circuit.                             i have also included green and red LED as in diagram.they are connected from pins shown...
  17. keron

    very loud alarm help please

    thank you all.piezo buzzer consumes less power also ,rt?for small distance it is always better to use piezo buzzer.than a siren circuit like the one i made.
  18. keron

    very loud alarm help please

    thanks .but upto  what distance approximately the buzzers work.i should better go for a buzzer than this circuit..for such small gain.
  19. keron

    very loud alarm help please

    hello MP,                        thanks for the reply .can you discribe a little more about adding LM 386.a rough estimate of loudness is, I need to hear the alarm  clearly at 20meter circumference,can you help
  20. keron

    very loud alarm help please

    i need an alarm circuit with very loud sound output.i have tried the circuit in attachement but sound output is not good.please help.                             i used 8ohms  0.5 watts speaker.
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