Mhz

Hello, I have the need to build a frquency Emmiter that will be Powerful enough to operate at about 100 feet distance, be able to have an adjustable frequency from about 1khz to 1Mghz... I would like to be able to input the desired frequency some way. Would I be better off buying such a gadget if available or attempting to assemble it a little at a time...? Thanks for any help

Hello, IMO it will probably be a bit cheaper and less time to buy one for about 10 or 15 bucks, But if you're doing it as a project or hobby, I would suggest getting your hands on a Voice Recordable Chip from Radio Shack or other Electronic Outlet, and then put together a simple schematic that will allow you to tie it into your phone system... I believe many of these type of chips allow for multiple recording points which will serve good for numerous messages.

Thanks Kevin and audioguru, very knowledgable answers with audioguru a bit easier for me to grasp, but none the less a very much thanks to your response Kevin, THANKS.

Thanks for the reply Prat.. Yeah, I have a power supply that appears to be putting out the correct voltage, but I'm uncertain of if the Rated Amperage Output is correct... It should be delivering 4 amps AC. But I'm not sure if it is. The device that it is powering is acting kind of whack at times, and now only a few leds show on it, It won't come on at all now, so I'm not sure if it is the device or the Supply... By the way the device is a Audio Mixer by Tascam.. Not supported anymore.. Anyhow thanks for the info... :)

Thanks Sasi for the Attempt to help, I believe it will be more difficult for me to Invert the DC to AC than buying or finding an AC source that will give me what I'm looking for... thanks anyhow..

ok Sasi, thanks for the help... Forget about my initial Voltages.. How do I convert DC Voltage to AC Voltage? Is there a Circuit That Show this type of Conversion? I will figure out the amperage breakdown using resistors after I get the dc source converted to AC.. The reason I'm asking this question is because I have a power source that Distributes 12v DC @ 5 amps, and the product I need to use it on need 10v AC @ 4 amps...

60hz ... it will be plugged in a standard house outlet..

Hello, Just wanted to know a good design (Circuit) to measure DC and AC Amperages without damaging the Power Supply being tested. Is there a Particular or certain LOAD to use when measuring the current? I know you are not suppose to measure direct current from a supply source without a load of some sort, this is why I ask what type of load source to use and the formula to calculate the current reading based on the Load used.. Thanks In Advance for any help here..

Hello Everyone, I'm Trying to find a good way or Schematic, that will show how to convert 12v DC (5 amps) to 10v AC (4 amps)... ??? Any solutions to this question will be much appreciated... Thanks

Hi, Yes, CMOS Comes in a variety of packages and functions for different purposes... CMOS type devices are known for there low power consuption for small devices etc. and are very sensitive to Static Electricity.. If you are somewhat familiar with TTL type components, then CMOS are somewhat comparable to your knowledge of TTL with the exception of adavantages of low power and other factors. If you are not Familiar with TTL design and operation, then you are puting the chariot before the horse and should first possibly get more knowledged on how these devices work, and then CMOS will be a bit more understanding to your project. There are plenty of References on these devices and their operations on this Forum's Links and the Internet Abroad, try that and I'll bet it will help your request on CMOS operations and functions... 8)

Great References Ante, Now I will have to somehow convert the actual Module unstable voltages and current into a definable output for the Circuits You Referenced me to, since they are sensitive digital type circuits... But This IS GREAT! :) Thanks Alot Once Again... 8)

Yes Ante, that's correct.. Just something to verify the Pulstrain of the Module, and preferably a circuit that will hold the data to show me that there is a Pulse comming from the Module.

by the way Ante, or any other helper, the circuit doesn't have to be a counter, but anything that will allow me to capture the results without me looking at it. That is why I suggested a Counter.. Sometimes it's hard to monitor the tester while cranking the engine etc...

Hello Ante, once again.. :) .. Yes, the circuit tester I am interested in designing will be used for checking Pulse-Type Voltage from an Automotive Ignition Control Module.. I do understand that it's easier to go buy one, but I want to design My own... My knowledge is that The Voltage that sends the Signal to the Coil Pack from the Module, is a Negative Voltage. I am designing this project to check for faulty Control modules (Pulsating or Not). As far as Amperage Draw, I belive for these 'Auto' devices, it should possibly be anywhere from 2 amps and up.. I'll have to measure and check.. Anyhow, thanks for the response and let me know of any help you can provide, thanks...

Hi, I'm Interested In designing a circuit that is capable of reading (Counting) voltage presence for a dc ground reference that will be shuting off and on... I dont believe the lowest point of voltage reference will fall to zero, but anywhere from 100 millivolts to 12v. any Reference or Ideas of such a circuit? Thanks for any help.