Where to get decent 120uF cap for 555 - Page 3 - Electronic Circuits Projects Diagrams Free

greg123 · 26th March 2008, 08:29 PM

Thanks Hero, I have put 5 of the Bat in the shopping basket. I have already made sure that I have 2 of everything just in case I short something out ;-)

2 q's, where do I connect the BAT diode? Also the 1nf and 10nf, I couldn't find them in Tantalum can I use different values? If not what sort of cap should I get for those two?

Thanks,
Greg.

Quote:

Originally Posted by Hero999

The components you've listed are fine.

If you're going to use the 7555 (which is probably a good idea due to the long time delay), then I'd strongly recommend using the BAT85 diode which can be bought from RS and isn't expensive.
http://uk.rs-online.com/web/search/s...BAT85&x=29&y=4

Another thing, is I'd also recommend getting some spare components - don't just buy one 7555, get two, just in case you make a mistake and destroy one.

Hero999 · 26th March 2008, 09:10 PM

Just use ceramic capacitors for the 1nF, 10nF and 100n; I know it isn't on the schematic but you need a 100nF capacitor across the power supply.

I told you where to put the protection diode several posts ago, here's the schematic.

greg123 · 27th March 2008, 12:15 AM

Sorry I missed that in earlier post, was tired. Okay I think I'm at purchase and breadboard stage now

Quote:

Originally Posted by Hero999

Just use ceramic capacitors for the 1nF, 10nF and 100n; I know it isn't on the schematic but you need a 100nF capacitor across the power supply.

I told you where to put the protection diode several posts ago, here's the schematic.

shokjok · 19th May 2008, 05:58 AM

How long do you expect the battery to last?

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26th March 2008, 09:10 PM	(permalink)
Hero999	Just use ceramic capacitors for the 1nF, 10nF and 100n; I know it isn't on the schematic but you need a 100nF capacitor across the power supply. I told you where to put the protection diode several posts ago, here's the schematic. __________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez

19th May 2008, 05:58 AM	(permalink)
shokjok	How long do you expect the battery to last?