Electronic Circuits and Projects Forum

I also would rather it be TI part. I love Texas instruments, they are nice to me. All their chips are good.

I need about 750ma or more. I also need 5 volt. THANKS

I was searchin around and Found a few. This one in particular. I ordered one of each one that I was interested in (3 of them) and ordered only one of them. Here is the link to the one I liked the best:

http://www.electro-tech-online.com/c...9/tl750m05.pdf

LM2937 from National will give 500ma at 5V.
The LM2940-50IKCSE3 from Ti will give 1A at 5V
Both are low drop out devices and are pin compatible with the 7805

Many low dropout regulators must have a 10uF to 100uF capacitor on their output to ground or they oscillate badly.
Some oscillate if the capacitor has a low ESR and others oscillate if the capacitor has a high ESR.

I stuck lots of caps on it to smooth out the voltage since I was dealing with the LS series.

I got my samples today (one of each, 3 total) and I am going to test them out.

I replaced the 7805 with the new and improved 780M05 Low Dropout regulator. I got it to put out a decent 5v output (4.98 if you want to get technical) when the voltage hit its roof, of about 6.5 volts. ME HAPPY. The binary clock will run much longer with it on there. about how many mA does a average (any/most) TTL LS series chip use? around 20 ma?

I am using 21 LEDS at 8ma

8*21=168ma
10ttl chips*n(ma use)=x

TTL LS uses a lot of current. You should have used Cmos because it uses almost no current.

An LED display also uses a lot of current. An LCD uses a very low current but it needs to be lighted when it is dark.