LMCCN Texas Instruments Timers & Support Products A LMCCN/ NOPB datasheet, inventory, & pricing. LMCCN. LMCCN Note: See Mil-datasheet MNLMCX for specifications on the military device LMCJ/ LMCMOS™ is a. Note: See Mil-datasheet MNLMCX for specifications on the military device LMCJ/ LMCMOS™ is a trademark of National Semiconductor Corp.

Author: Goshicage Mazukinos
Country: South Africa
Language: English (Spanish)
Genre: Politics
Published (Last): 26 July 2007
Pages: 246
PDF File Size: 13.10 Mb
ePub File Size: 14.53 Mb
ISBN: 340-9-40017-299-3
Downloads: 24555
Price: Free* [*Free Regsitration Required]
Uploader: Mazujinn

LMCCN datasheet, Pinout ,application circuits CMOS Timer

Usually you would just set the slides to automatically advance and set them to loop. How long llmc555cn you want this timer to work in secondsand what are you using to trigger it a push button? I’ve attached a schematic of the actual circuit below but without a few modifications that I’ll mention later.

An ordinary has an output high voltage spec’d with an output current of mA when its supply voltage is only 5V. Essentially, I’m taking a keyboard PCB and attaching the corresponding contacts for the space bar to a solid state relay. The supply current spike from a Cmos operating at your low supply voltage is tiny compared to the up to mA supply current spike caused by an ordinary Do you already have an account?

Jun 23, 2. After sifting through the datasheet of the a few times I can’t find any mention of the maximum output current so from here onwards it’s 2mA! Hi Bill, thanks for the extremely quick reply!!

Dec 20, 10, 1, Its output high voltage is spec’d with vatasheet output current of only 2mA which might not be enough to turn on your solid state relay. You May Also Like: Jun 23, 3. Jul 22, 10 0. Jun dataeheet, 4. Xatasheet with timer Posted by itel in forum: Hi all, First up, my apologies for another thread as I can’t find a similar thread to tag onto Malware on Android Devices Mimics Dxtasheet Specs and Wastes Billions of Dollars Ever wonder why so many Datasheey apps ask users if they’d like to download obscure add ons like “smart charging”?


Also, which type of capacitors should I be using for my project – tantalums, ceramic or electrolytic as I am a complete novice! I have to admit I did have a moment of horror when you mentioned the 2mA output current – I just checked the datasheet of the SSR and found that the stated maximum forward current is 2mA I had originally thought it was 3mA hence my brief moment of panic!!!

The Cmos has a very low output high current especially when its supply voltage is only 5V.

I’m planning on having 2 relays in series – one will trigger and simulate the space bar being pressed, one relay will light up an LED and the other will simply just close an external circuit for external expansion one of these relays are a dual SPST relay hence 2 relays!

You gave a lot of info, but I have to admit I’m still confused, so break it down. It isn’t to improve your user experience. The idea behind this circuit is to automatically cue slides for presentations.

Help with making a timer circuit Posted by paulareno in forum: Your name or email address: I’m trying to get the output to go low for 3 to 10 seconds which I’m hoping can be tweaked by the potentiometer and then I’m aiming for a mS duration for when the output goes high I pulled this figure out of thin air as I’ve really no idea how long to make lcm555cn simulated key press – it just seemed to fit!

Mar 24, 21, 2, I’m attempting to make up a circuit that will trigger a key press on a keyboard with the help of a solid state relay. No, create an account now.

Once the circuit is powered it will then be left alone maybe for a couple of hours without any further intervention. How to Reduce Ground Bounce: So in a nutshell, my plan is to make this timer press the space bar at predetermined intervals Lkc555cn I haven’t made things more confusing than they were before!!


Help with timer circuit please!

CMOS Timer

After re-reading my post it looks like I completely forgot to mention how I’m going to use the timer!! For R1 I’ve decided to use a variable resistor finding a Quote of the day. So far, after about 2 days trawling through both Google here for inspiration I’ve come up with the circuit below but with a few modifications. Jun 23, 5.

Help/advice with 555 timer circuit

I’ve lost track of what I’ve read where but I did read something about having a capacitor as a supply bypass due to spikes from the when it changes state. Jun 23, 1. Posted by nodestination1 in forum: Yes, my password is: There’s times when I just can’t quite explain things simply and something tells me this could be one of those times so apologies if that’s the case!!

As the power is being tapped off the USB port in parallel to the keyboard am I guessing correctly that it would be a good idea to include this bypass and, if so, what capacitor should I use?

Thanks again for taking your time to reply! Or will there be something I need to add such as a resistor to ensure the SSR does turn off? Also, if there is an easier way to accomplish the same task please let me know I’m all ears!!! I’m hoping I’ve included enough info here but if I’ve omitted anything let me know!!!