#garfield Logs

Jul 21 2025

12:43 AM rue_mohr: uh, the screw headers dont usually work like that
12:58 AM rue_mohr: is it a failover?
08:06 AM rue_mohr: http://media.ruemohr.org/images/p1340951.jpg
08:06 AM rue_mohr: http://media.ruemohr.org/images/p1340957.jpg
08:06 AM rue_mohr: http://media.ruemohr.org/images/p1340960.jpg
08:06 AM rue_mohr: the robo-remote came together ok, can expand on it later
08:15 AM aandrew: I just saw this big spider (well big ass, long legs but total maybe only 10cm from leg to leg) climb the arm of one of my wicker chairs which is no small feat for someone with an ass that big, then get to the horizontal arm of the chair, take like 5 steps to get into the sunlight, react as if it was a vampire, fall off the chair on to the ground and do the cat "I meant to do that" kind of look/clean
08:15 AM aandrew: thing before wandering off under another piece of furniture
08:16 AM aandrew: rue_mohr: looks good, what's that the remote for
08:17 AM aandrew: now there's a bumblebee fighting hard to squeeze his fat ass into the tiny flowers in the hanging plants
08:20 AM rue_mohr: mostly targeted to the remote control skidsteer
08:24 AM aandrew: what's the real estate market like in your area (don't want to dox you) - something like what you've got
08:24 AM rue_mohr: a bit rare to see a house under $1M
08:24 AM rue_mohr: so, stupid.
08:25 AM aandrew: wow even where you're at?
08:26 AM rue_mohr: yea, its stupid
08:26 AM aandrew: maybe I'm best off doing my high tech redneck idea - 35' all-season 5th wheel and a truck to tow it
08:26 AM rue_mohr: I think the eval on my place now is $800k
08:27 AM aandrew: granted you do have a nice property and decent house
08:27 AM rue_mohr: haha
08:27 AM rue_mohr: no, I have to tear that 'house' down
08:27 AM aandrew: I woudl have figured being ferry-locked would have moderated the price in your area but it sounds not
08:27 AM rue_mohr: looks good on outside, in side is made of cardboard and hot glue
08:28 AM rue_mohr: work, bbl
08:28 AM aandrew: is there really no road access back to civilization? Or is it just narrow and inconvenient and long?
08:28 AM aandrew: lol cardboard and hot glue
06:51 PM rue_mohr: no you have to take the ferry
10:47 PM VanUnamed: https://ibb.co/5W189zzJ do you see any seriously wrong thing here?
10:47 PM VanUnamed: just another set of eyes before i etch the wrong pcb Lol
10:48 PM rue_mohr: yes, the transformer wiring
10:48 PM VanUnamed: wat about it
10:48 PM rue_mohr: the big gap in the middle of the primary
10:48 PM VanUnamed: pin 4 and 5?
10:49 PM rue_mohr: assuming J2 is power in
10:49 PM VanUnamed: yes it is
10:49 PM rue_mohr: er, j1?
10:49 PM VanUnamed: j1 is just 1 phase
10:49 PM VanUnamed: to put a switch on
10:49 PM VanUnamed: imagine j1 as "switch"
10:50 PM rue_mohr: is that a capacitor voltage multiplier?
10:50 PM VanUnamed: yes
10:50 PM VanUnamed: that is CORRECT right?!
10:50 PM VanUnamed: Lol
10:50 PM VanUnamed: i just tested this with diode and capactiros adn copied it on the schematic
10:50 PM rue_mohr: why are you using a big ass multipler when you ahve a transformer?
10:51 PM rue_mohr: did you test it with a relay? capacitor multipliers are amazingly gutless
10:51 PM VanUnamed: cus the transformer gives 10.5v. relay is 24v
10:51 PM VanUnamed: and yes it does engage fine
10:51 PM rue_mohr: ok, its 10.5VAC, right?
10:51 PM VanUnamed: y
10:52 PM VanUnamed: multiplier gives 29vdc
10:52 PM rue_mohr: if you full bridge that, it, thats 1.4X (filtered)
10:52 PM rue_mohr: is 14.7, a 24V relay will pull in at about 12V,
10:52 PM rue_mohr: hmm
10:52 PM rue_mohr: your working with scrounged parts aren't you?
10:52 PM VanUnamed: it pulls better when theres 29vdc
10:53 PM VanUnamed: obvious
10:53 PM rue_mohr: yes, ok.
10:53 PM rue_mohr: whats size are your caps
10:53 PM VanUnamed: i used 330uf ones
10:53 PM VanUnamed: but i have any size really
10:53 PM rue_mohr: ok
10:53 PM VanUnamed: but is it wired correctly
10:53 PM VanUnamed: thats all iwanted to know
10:54 PM rue_mohr: did you ohm out the transformer you have to make sure those primary connections work?
10:54 PM VanUnamed: yes
10:54 PM rue_mohr: k stand by
10:54 PM VanUnamed: thanks
10:55 PM rue_mohr: mmm, something seems off with your multipler
10:56 PM rue_mohr: I think your - tap is in the wrong spot
10:57 PM rue_mohr: yes
10:57 PM rue_mohr: your - should be off terminal 1
10:58 PM rue_mohr: er wait
10:58 PM rue_mohr: no, 2, you have this upside down to how I'm used to it
10:58 PM rue_mohr: this is hurting my brain...
10:59 PM rue_mohr: 2
10:59 PM rue_mohr: each cap is ~Vin
10:59 PM rue_mohr: no, 2vin
10:59 PM VanUnamed: yes both have to be onnegative
11:00 PM rue_mohr: the - to your led and relay are connected to the wrong point tho
11:04 PM rue_mohr: can you prove the error on your side?
11:06 PM rue_mohr: this whole thing is an A/B switch?
11:07 PM rue_mohr: and, your switching with the high side
11:07 PM rue_mohr: you could make that a low voltage switch eh?
11:11 PM rue_mohr: Can I help you design a capacitor dropper to give you the 24V? No obligation to use it
11:22 PM VanUnamed: ok
11:23 PM rue_mohr: ok, so, you always have a surge resistor, small, maybe about 10 ohms, 1w (it doesn't disspitate much of anything) what value do you have?
11:26 PM VanUnamed: all
11:27 PM rue_mohr: ok, lets say 10 ohms
11:27 PM rue_mohr: now the trickey question, what is the current draw on your 24V relay, I'm guessing its about 12mA
11:27 PM rue_mohr: at 24V
11:29 PM rue_mohr: gooten ist translaten deutch?
11:32 PM VanUnamed: 20 30 ma
11:33 PM rue_mohr: 30ma, ok
11:33 PM rue_mohr: are your mains 100, 120, 200, 240V?
11:35 PM VanUnamed: 220
11:37 PM rue_mohr: 50 or 60Hz?
11:40 PM VanUnamed: 50
11:41 PM rue_mohr: ok!, I will calculate, my calculations are for 120V 60Hz, so give me a bit of time
11:50 PM VanUnamed: wgat are u doing
11:50 PM rue_mohr: its a series dropper, it uses capacitive reactance to drop the votlage
11:51 PM rue_mohr: I found the value
11:51 PM rue_mohr: 0.47uF
11:51 PM rue_mohr: do you know the capacitors they use on EMI filters on mains for power supplies?
11:51 PM VanUnamed: yes?
11:51 PM rue_mohr: its a capacitor, an inductor, and another cap?
11:51 PM VanUnamed: but what are yoi doig idgi
11:51 PM VanUnamed: ye
11:51 PM rue_mohr: you want one thats 0.47uF
11:51 PM rue_mohr: I'll show you, just finished drawing it
11:53 PM rue_mohr: this is easier for me, becasue I did charts from test results for my own voltage and frequency
11:53 PM rue_mohr: I had to do some math to work this out for your case
11:53 PM VanUnamed: sorry i make you waste time
11:53 PM rue_mohr: I want to show you this
11:53 PM rue_mohr: just so you see it
11:54 PM rue_mohr: http://media.ruemohr.org/images/p1340962.jpg
11:54 PM rue_mohr: This is the circuit, the capacitor drops 196V (average)
11:54 PM rue_mohr: the circuit is smaller than the transformer
11:55 PM VanUnamed: yiu mean no transformer?
11:55 PM rue_mohr: correct
11:55 PM rue_mohr: just this circuit
11:55 PM rue_mohr: the bridge rectifier only needs to be rated for 24V, (30V..)
11:56 PM VanUnamed: but i dont have 24v rated rectifiers
11:56 PM VanUnamed: ol
11:56 PM VanUnamed: lol
11:56 PM rue_mohr: its ok to use higher
11:56 PM rue_mohr: the whole circuit is almost simpler than your voltage trippler :]
11:57 PM VanUnamed: but why theres a zener on the relay coil
11:57 PM VanUnamed: i just put a normal 1n4001 there
11:57 PM rue_mohr: protection, heat causes the resistance to increase, which makes the voltage go up, which makes more heat
11:58 PM rue_mohr: this is a constant current circuit, the zener controls it
11:59 PM VanUnamed: and i aso need a glass red diode with 24v?
11:59 PM rue_mohr: for this circuit, you need a 24V shunt regulator, a zener is easy, you can use other methods