Testing a TSOP1738

hgmjr

Joined Jan 28, 2005
9,029
Hi could any one help me to test the tsop1738 is good or not........?
Greetings rvm.karthi.

Posting your question on more than one forum is a perfectly good way to cross check suggested solutions. It also gives you a larger audience for your specific problem since others may have your same problem and can benefit from the suggestions provided.

hgmjr
 

Thread Starter

rvm.karthi

Joined Dec 29, 2009
13
Hi
i got this circuit n i tried but i am getting 4.9v in output without giving any ir rays... can any one help me pl....
 

bertus

Joined Apr 5, 2008
19,939
Hello,

If you got a circuit, post it here and we will have a look at it.

Greetings,
Bertus
 

Thread Starter

rvm.karthi

Joined Dec 29, 2009
13
That circuit is simple, 100 Ohm serious with input 5vdc and 10k parallel with i/p and o/p then 4.7 microfarad with i/p and ground....
 

bertus

Joined Apr 5, 2008
19,939
Hello,

That is said in the FAQ:

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Succes,
Bertus
 

Audioguru

Joined Dec 20, 2007
11,251
A bitmap uses very many digital bytes. Convert it to a PNG file type that uses few bytes and is very clear. Use Microsoft Paint program to convert it.
 

Audioguru

Joined Dec 20, 2007
11,251
The datasheet for the TSOP1738 shows that its output goes low (with a fairly low amount of current drive) when it receives IR bursts of 38kHz. Without a modulated IR input it output is normally high like yours has.
 

Thread Starter

rvm.karthi

Joined Dec 29, 2009
13
But i am using the LG AC remote control only kno...... does it not gives the modulated O/P........?
 
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