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    RC-(remote controlled) Car

    i have a FM Radio kit which i have tested and it is built around a samsung am/fm radio IC , it is a full superhet FM Reciever with preamphasis and PLL Tuning , It uses a Gang Capacitor for tuning ,  i would require a frequency filter of some sort for the dtmf frequecies. so when there is no...
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    RC-(remote controlled) Car

    pics continued....
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    RC-(remote controlled) Car

    Well First things first here are the pictures of the coils i made (L1 is a tunable coil with ferrite core for tuning) , and you require a lower value of emitter resistors like 100 ohm for the RF Transistors . To shield it you require a metallic shield between the driver and the amplifier. The...
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    Use of LM324 in audio circuit

    hello Paul_J, well as chinmoy1955 said LM324 is not suitable for audio because of it's high noise and THD , but LM324 is often used as a comparator for analog circuits. you can find mixer and audio circuits which use texas instruments tL074 or 72 or 71 here http://sound.westhost.com/
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    RC-(remote controlled) Car

    Today i will go to get ferrite beads and the RF Transistors. Well The emitter resistors i don't know which values to put , do they have to be greater in term of power i mean 1/2w or 1w or 2w maybe or in value and Wattage. Well i am going to build a prototype and i am going to build three...
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    RC-(remote controlled) Car

    here is the modified Schematic of the things you posted. And it is also written in the title checked by AUDIO GURU ..  ;D Well i think you should join the www.electronics-diy.com community also , It is in a beta stage so it is growing.
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    RC-(remote controlled) Car

    Well in my country there are no Radio cops to whom i have interferance . so no problem there. about the R5 resistor yes the other end is backwards ,well i guess i have to redaraw the schematic and PCB with your settings now lets see . ok i will use a 0.1uf because i have one . for the...
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    RC-(remote controlled) Car

    Here is a PCB layout and shcematic for my latest TX-500 500mW FM Transmitter i am building for my RC Remote controlled car using DTMF Signals to control it . I have not build it but this will hopefully be my 3rd transmitter project . from 40mW and 10mW to 500mW . Well hope this works . I found...
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    PSU Design for car audio amplifiers using UC2577-ADJ

    so you are saying we can invert it but the voltage will be less , i mean if we give the OPA548 60v and give it input 60v also and use inverting configration will it not produce -60 at the output
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    PSU Design for car audio amplifiers using UC2577-ADJ

    actually it is you can operate it on a single supply see this application note of OPA548 http://www-s.ti.com/sc/psheets/sboa059/sboa059.pdf
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    PSU Design for car audio amplifiers using UC2577-ADJ

    Well THere can be another way why not invert the voltages using TI OPA548 configured as an inverting amplifier with gain 1 , ie configured as a voltage regulator it is capable of 60V @ 3A (3000mA) , since it has inverting negative ouptut it will work .
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    PSU Design for car audio amplifiers using UC2577-ADJ

    I think you are right but the problem is that is there any converter capable of Positve to negative voltage conversion having high amperage . or any other distinct method to convert positive to negative
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    PSU Design for car audio amplifiers using UC2577-ADJ

    Hello Everyone , this is faizanbrohi again to discuss yet another project design . actually it is related to building a Power supply for car audio using a IC UC2577-ADJ and fits the need Perfectly for a 12V battery step up psu. Main Page ...
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    (EMF) Electromagnetic field detector

      " Are you a ghost hunter? Then this is the circuit that you've been waiting for! Since it has been observed that appearance of a ghost tends to disturb the EMF, you can now detect any such changes with this little detector." I think we are hunting ghosts with this meter
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    Stereo Audio power amplifier 2 x 40W - 80W

    HEllo again , everything is working fine , the only problem now is the brightness of the LED how to increase the brightnesss of the LED.
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    Another INVERTER we can talk about..

    If only Texas Instruments would have an ACTIVE status on the TAS5152 Evaluation board , it would have beeen possible for us to actually get the USer guide at least , where all the PCB Layout and gerber files are given . can i use SG3525 PWM Controller IC With this , it is also a PWM Controller
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    Another INVERTER we can talk about..

    i think a evaluation board is neccesary to implement this . but the problem is that i cannot buy the evaluation board in my country , one of my relatives live there in toronto but i bet they don't know the location , audioguru you also live in canada , can you check out the Texas instruments...
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    Another INVERTER we can talk about..

    Here are the schematics any ideas about where is the input and ouput , because first i want to try out the 125W audio amplifier and see if it works. THe problem is that the TAS5152 side is easy to tackle and understand but i donot understand the PWM Section of where is the Input signal and how...
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    Another INVERTER we can talk about..

    I have ordered 5 samples of TAS5152 , TI has shipped it to FedEx , it will be here on 3 august 2006 , but i think it will be delayed because of rainy weather in my country.
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    0-30 Vdc Stabilized Power Supply

    Can you attach the suggested parts list . i have everything except the OPA series Op amps , can you suggest any other opamp.
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