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Morse pulse generator based on Monostable 555 circuit

 
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Miriax
Newbie


Joined: 28 Dec 2008
Posts: 1

PostPosted: Sun Dec 28, 2008 4:39 pm    Post subject: Morse pulse generator based on Monostable 555 circuit Reply with quote

I drew inspiration for this project from this topic and this site.
This is my circuit diagram:

The pulse length varies as T = 1.1 R1 C1.
T = time period in seconds (s)
R1 = resistance in ohms
C1 = capacitance in farads (F)

I'm going for approximately a 0.125s cycle, probably less, so .125 ~> 1.1(20000)(0.0000047). I'll be using a 15k resistor with a 0-5k pot. I'm also allowing +/-20% because the 4.7uF capacitor is electrolytic.

I'm just starting out in electronics, but can anyone tell me if this circuit will do what I think it will? I want it to send a brief, timed pulse every time the key (trigger) is depressed. I think I've got the timing down, but who knows? I may not have the battery wired correctly.

Thanks, and I'll let everyone know how the circuit works once I put it together.
Miriax
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Alexander125
HG Master


Joined: 13 Jan 2009
Posts: 105
Location: Galati, Romania

PostPosted: Fri Feb 06, 2009 12:45 pm    Post subject: Reply with quote

from what i knew the 7 and 6 pins should be hooked up to eachother.
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Alexander125
HG Master


Joined: 13 Jan 2009
Posts: 105
Location: Galati, Romania

PostPosted: Tue Apr 14, 2009 12:06 pm    Post subject: Reply with quote

the batery is wired wright.
Does it work properly now??
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