Friends, following picture is of a
Simplest radio frequency(RF) indicator
and meter that i have got yet.
PURPOSE OF CIRCUIT:
Circuit is used to indicate whether or not
the radio frequency Tx circuit in your
hand oscillates.
If LED on the board is bright means your
circuit is oscillating means you ROCK.
Need for the circuit:
Anybody who had messed with rf
circuits will readily agree with me that
whenever a rf circuit is turned on, the
very first shout made by mind "is
oscillator part of it working?"
(and next will be a prayer " O'God may
this INDUCTOR be blessed not cursed!" ,
at least in my case :-)
Let suppose you are working on FM- Tx
or AM-Tx ,they will always contain a
sound preamplifier and oscillator
section. preamplifier section may be
tested with headphones or Power
amplifier(like PC speakers) but how to
test the oscillator section?
You may think of Radio receiver.
But whats your transmitting frequency ?
what if you have low power Tx or
frequency much below or above than
radio could receive ? Tuning each band
in search of your transmision will really
be cumbersome,specially when you
even dont know that whether
transmission has begun or not?
You may readily be disappointed and
think "sala inductor kharab hai".
Here comes usage of above circuit. No
matter what frequency it is, if your
oscillator part is working LED will glow.
This , at least, makes you optimistic
about your circuit that yes it working,
now i have just to vary coil spacing or
value of tuning capacitor to get desired
frequency.
Working of circuit:
Basically circuit is designed to charge
100nF capacitor .
Circuit starts working when 5cm lead is
attached to RF emitting source(like
antenna,collector of oscillating
transistor etc).
Now whenever positive cycle comes it
creates a push in electrons present in
wire which is transferred to capacitor
through upper diode & for negative cycle
a pull is produced which again makes
electrons to flow in same direction thus
charging 100nf capacitor.
LED is exactly connected to capacitor as
if it is a charged battery.
100pf capacitor is used to create dc
isolation.
Circuit Modification:
When i finalized circuit and tested my
FM-Tx, LED glowed very weakly.
When i removed 470 ohm resistor, Led
strength increased,but not satisfactory.
Accidentally when i touched cathode of
LED, it became magically bright.Well it
has got fair reason for that: it got better
ground through my body.
Be careful brighter the led will draw
more power from your transmitting
circuit.
Moreover:
The circuit can work as strength meter if
put your digital multimeter's test leads
at terminals of capacitor.
That is multimeter will indicate voltage
built across capacitor. higher voltage
greater strength of you transmitter.
Copycat! just copied! design,css even all post are copied from various source!
[2015-04-12 19:51:32]Oviman:
so what! we need to learn electronics
[2018-03-06 03:57:12]Ramona Jordan:
I discovered your LED RF POWER METER/ INDICATOR - page and noticed you could have a lot more traffic. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. We can send you targeted traffic and we let you try it for free. Get over 1,000 targeted visitors per day to your website. Start your free trial: http://xahl.de/p Unsubscribe here: http://xahl.de/q
[2018-03-25 20:59:49]Kerry Beck:
Do you need more people to visit your website? We have a 7 day free trial that will drive targeted visitors to your website. If you have been struggling with getting your website in front of people then come try our traffic service risk free. Just click the link below to check out our service and select your package, each package includes a 7 day free trial period. There is no catch, if you don't like the service you can cancel during the trial period you will not be charged anything. These visitors are all targeted by the keywords and countries that you submit when you place your order. Start your free trial today: http://insl.co/11 Unsubscribe here: http://stpicks.com/2ruse
[2018-04-02 02:07:05]Kerry Beck:
I came to your LED RF POWER METER/ INDICATOR - page and noticed you could have a lot more traffic. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. We can send you targeted traffic and we let you try it for free. Get over 1,000 targeted visitors per day to your website. Check it out here: http://stpicks.com/2rusd Unsubscribe here: http://xahl.de/q
[2018-04-08 06:20:47]Kerry Beck:
I came across your LED RF POWER METER/ INDICATOR - website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE web traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: http://xahl.de/p Unsubscribe here: http://stpicks.com/2ruse
[2018-04-15 16:14:14]Kerry Beck:
I came across your LED RF POWER METER/ INDICATOR - website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE web traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: http://stpicks.com/2rusd Unsubscribe here: http://stpicks.com/2ruse
[2018-04-22 09:28:00]Kerry Beck:
This is a comment to the LED RF POWER METER/ INDICATOR - admin. Your website is missing out on at least 300 visitors per day. Our traffic system will dramatically increase your traffic to your website: http://insl.co/11 - We offer 500 free targeted visitors during our free trial period and we offer up to 30,000 targeted visitors per month. Hope this helps Unsubscribe here: http://stpicks.com/2ruse
[2018-05-01 22:26:56]Kerry Beck:
I came across your LED RF POWER METER/ INDICATOR - website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE website traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: http://url.euqueroserummacaco.com/3ewon Unsubscribe here: http://xahl.de/q
[2018-06-04 12:05:38]Amber Stevens:
I came to your LED RF POWER METER/ INDICATOR - page and noticed you could have a lot more traffic. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. We can send you targeted traffic and we let you try it for free. Get over 1,000 targeted visitors per day to your website. Check it out here: http://xahl.de/p Unsubscribe here: http://stpicks.com/2ruse
[2018-08-13 21:52:23]Targeted website visitors:
I came across your LED RF POWER METER/ INDICATOR - website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE web traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: http://duckshop.co/1f1p Unsubscribe here: http://stpicks.com/2ruse
Targeted website visitors https://flust.de/tpuwx
Copycat! just copied! design,css even all post are copied from various source!
so what! we need to learn electronics
I discovered your LED RF POWER METER/ INDICATOR - page and noticed you could have a lot more traffic. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. We can send you targeted traffic and we let you try it for free. Get over 1,000 targeted visitors per day to your website. Start your free trial: http://xahl.de/p Unsubscribe here: http://xahl.de/q
Do you need more people to visit your website? We have a 7 day free trial that will drive targeted visitors to your website. If you have been struggling with getting your website in front of people then come try our traffic service risk free. Just click the link below to check out our service and select your package, each package includes a 7 day free trial period. There is no catch, if you don't like the service you can cancel during the trial period you will not be charged anything. These visitors are all targeted by the keywords and countries that you submit when you place your order. Start your free trial today: http://insl.co/11 Unsubscribe here: http://stpicks.com/2ruse
I came to your LED RF POWER METER/ INDICATOR - page and noticed you could have a lot more traffic. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. We can send you targeted traffic and we let you try it for free. Get over 1,000 targeted visitors per day to your website. Check it out here: http://stpicks.com/2rusd Unsubscribe here: http://xahl.de/q
I came across your LED RF POWER METER/ INDICATOR - website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE web traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: http://xahl.de/p Unsubscribe here: http://stpicks.com/2ruse
I came across your LED RF POWER METER/ INDICATOR - website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE web traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: http://stpicks.com/2rusd Unsubscribe here: http://stpicks.com/2ruse
This is a comment to the LED RF POWER METER/ INDICATOR - admin. Your website is missing out on at least 300 visitors per day. Our traffic system will dramatically increase your traffic to your website: http://insl.co/11 - We offer 500 free targeted visitors during our free trial period and we offer up to 30,000 targeted visitors per month. Hope this helps
Unsubscribe here: http://stpicks.com/2ruse
I came across your LED RF POWER METER/ INDICATOR - website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE website traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: http://url.euqueroserummacaco.com/3ewon Unsubscribe here: http://xahl.de/q
I came to your LED RF POWER METER/ INDICATOR - page and noticed you could have a lot more traffic. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. We can send you targeted traffic and we let you try it for free. Get over 1,000 targeted visitors per day to your website. Check it out here: http://xahl.de/p Unsubscribe here: http://stpicks.com/2ruse
I came across your LED RF POWER METER/ INDICATOR - website and wanted to let you know that we have decided to open our POWERFUL and PRIVATE web traffic system to the public for a limited time! You can sign up for our targeted traffic network with a free trial as we make this offer available again. If you need targeted traffic that is interested in your subject matter or products start your free trial today: http://duckshop.co/1f1p Unsubscribe here: http://stpicks.com/2ruse
Targeted website visitors https://flust.de/tpuwx