#garfield Logs

Nov 10 2012

11:18 rue_mohr morning
11:20 iamturnip I have a little issue here thought you might have an answer
11:22 iamturnip need a 1000uf 40V cap, all I have is 1000uf 35V and down... ideas?
11:44 rue_mohr you will prolly find the operating voltage is 24 to 36V
11:44 rue_mohr there is also a rating tolerance
11:45 rue_mohr if you have anything down to about 470uF your prolly ok
11:45 rue_mohr what is the device?
11:51 iamturnip 1971 radio
11:51 iamturnip which operates at 35V
11:51 iamturnip itst he filter for the power supply
11:51 iamturnip so I was hoping not to use 35V
11:52 rue_mohr 100% isn't good engineerig
11:52 rue_mohr the caps are good for more voltage than their rating
11:53 rue_mohr the other option is to parallel two 470uF caps
11:53 rue_mohr I could send you one, but I suspect you can get one faster over there ;)
11:54 iamturnip can you put two 35V together to make it 70V or it doesnt work like that
11:58 rue_mohr yes, but the capacitance halves
11:59 rue_mohr two 2000uF 20V in series would be 1000uF 40V
12:05 iamturnip ok
12:07 iamturnip thanks for the help.... hope all is well with you
12:08 Tom_itx you can?
12:23 rue_shop3 yea, for some reason they apparently balance ok
12:24 rue_shop3 any word from kat?
12:25 Tom_itx nope
12:25 Tom_itx but who could know for sure
12:26 rue_shop3 hmm today might be a no student day
12:29 Tom_itx we should mod marlin for cnc use
12:29 Tom_itx take out the extra axis for filament feed etc
12:30 Tom_itx it was an idea i had
12:30 Tom_itx i doubt it ever happens
12:33 Tom_itx do you know what the lcd with SD is called for the 2560?
12:37 rue_shop3 no
12:38 rue_shop3 but I like to make sure code works before I modify it :)
12:38 Tom_itx i see one with buttons for the 2560
12:39 Tom_itx 2x16
12:39 Tom_itx i was hoping for a 20x4
12:42 rue_shop3 heh
12:43 Tom_itx $6 free shipping
12:43 Tom_itx err 8
12:45 Tom_itx sd slot reader $1.76 free shipping
12:45 Tom_itx that almost qualifies for your $1 buy thing
14:12 rue_mohr you can get sd media converters for a buck and remove the connector
14:17 TELunus|2 Compiled linux kernel last night
14:24 rue_mohr ah yes
14:24 rue_mohr did you get it right the first time?
14:24 rue_mohr lots of options
14:30 TELunus|2 Havn't managed to boot in and test yet.
14:31 TELunus|2 First time I tried was the night before, but then my build was failing. Had to go turn off some drivers in staging.
14:57 rue_mohr whats the kernel for?