IR Jammer Circuit not working

[sneitzke38]

Hey I found one would this work with my circuit?

 

[tsvetelin_velkov]

Try this :

TV Remote Control Jammer

But as discussed already, you need to connect two and to sum the signal

 

[sneitzke38]

How would I connect the two?

 

[tsvetelin_velkov]

By using 74HC08, output of two 555 is connected to the two inputs, output of the gate is connected to the base resistor ...

 

[sneitzke38]

Thank you but is there a alternative to that gate? Cannot seem to find that one at the stores in my area. Also how does this work i don't get how by merging the two signals it works? Does it amplify them? or what?

Thank you for all your help!

 

[vinodstanur]

Just connect the output of above circuit to the pin number 4 of your first circuit..(before that disconnect the pin number 4 of first circuit from vcc)

Then adjust the frequency of above circuit to about 1khz...

 

[sneitzke38]

Would i just use a resistor to adjust to 1khz? if so what ohm? thanks

 

[vinodstanur]

**broken link removed**

use above calculator to find those....

 

[tsvetelin_velkov]

I think you have to start with the basics. Try this book :

50 - 555 Circuits

Somewhere inside there should be a schematic of two 555 controlling each other, maybe a multi tone siren Then you can skip the gate

 

[sneitzke38]

Thank you but what is T1 and T2 or should i not worry about those?

 

[vinodstanur]

or use this one
Astable 555 Square Wave Calculator

---------- Post added at 20:51 ---------- Previous post was at 20:47 ----------

or
555 Astable Circuit Calculator

---------- Post added at 20:54 ---------- Previous post was at 20:51 ----------

use
C1=0.01 uF
R1 = 10K
R2 = 68K
----------------
frequency = 1KHz aprox

 

[sneitzke38]

Perfect thanks will go pick up the materials and tell you guys the outcome!

 

[sneitzke38]

I Have been looking at this diagram and was wondering if 7 should be connected to something i have a 10 uf capacitor connected to pin 5 but am not sure where 7 goes?

 

[jpanhalt]

Ya im not very sure about all of the programming to my mind the 555 seems like the easiest for my does anybody have a schematic of this 555 MV working

Thanks all!

Here is a 555-based oscillator that may do what you want. All capacitors are in uF, unless noted. I used polystyrene for my timing components. You can use regular ceramic or mylar (polyester). IC1B modulates IC1A. The carrier was 38Kz. I used an LM556, which is just 2 LM555's in a single package. You can use the pin names to redraw it using two 555's.



John

Edit: Wow, over 10 posts in the time it took me to type and up load that. Sorry for the duplication.

 

[sneitzke38]

No problem very helpful anyway!

 

[tsvetelin_velkov]

John,

this is what I meant - one 555 is controlling the other ( just did not had the schematic in hand ), no need to use the logic gate, just need to add a transistor and more LEDs , probably to adjust R6 for good biasing of the switch transistor - if the transistor is BC337, it can carry 10 LEDs without a problem, base resistor about 1k

Hope this will close the article .

 

[sneitzke38]

well it's not working again here's what i got:

My original circuit instead of a 555 a 556 is in its place
The 556 is used for the following along with the original circuit.
MULTIVIBRATOR

R1 -10 ohm resistor
R2 -68 ohm resistor
C1 -0.01 uf capacitor

When I turn the circuit on the 556 gets 95F degrees (Very hot). and there are no kHZ getting to the led. Does anybody know why this is happening?

 

[tsvetelin_velkov]

There is something wrong ... it should not get hot. Check all connections again. Try to make the circuit as proposed by jpanhalt and add the final stage - more leds and switching transistor as I wrote previously.

---------- Post added at 10:36 ---------- Previous post was at 10:26 ----------

check power supply, this is usually where you have to start ... then look at the outputs - pin 3

 

[sneitzke38]

There is something wrong ... it should not get hot. Check all connections again. Try to make the circuit as proposed by jpanhalt and add the final stage - more leds and switching transistor as I wrote previously.

---------- Post added at 10:36 ---------- Previous post was at 10:26 ----------

check power supply, this is usually where you have to start ... then look at the outputs - pin 3

It does not get hot until i connect 5 to 10 (output to reset) on the 556. Any ideas?

 

[jpanhalt]

It does not get hot until i connect 5 to 10 (output to reset) on the 556. Any ideas?

That doesn't make sense. Pin 5 is output from one 555 section (IC1A). Connecting that directly to your power supply would not be good. True, 555's can source or sink, but that would create almost a dead short to ground.

Here is the schematic of a 555 so you can see what I mean. Q22 and Q24 are the output transistors.



Are you absolutely sure you connected pin 5 directly to V+ supply? Do you have the reset (pin 10) connected to the supply?

John