simulate this circuit – Schematic created using CircuitLab
hi .. this circuit is how to stepdown a 220v to 5v so you can mesure voltage using microcontroller .. my question is how to know the value of each resistor and capacitor and what is the equation for it and i want to know why he use...
Goal:
I've got a set of EC and pH water sensors that need to sit in the same batch of water / capture values real-time for a Arduino project.
However my sensors cancel each other out when both are submerged cause it's creating a circuit in said water. So I've been trying to utilize these MOSFE...
@Asmyldof colour with that microscope is really bad, but it definetly is a light green not a copper sulphate blue, but its probably some mix of stuff. whatever the battery leaked reacted with things under the gold plating, which is mostly copper and maybe a bit nickel
@Asmyldof an NiMH/Cd rechargeable? hm, maybe, I don't know how they look when they disintegrate, but other stuff like the shields have ordinary rust on them (or at least it looks like that) where it got hit by battery liquid, and what was left of the battery was all rusty brown too, don't know NiMH/Cd battery chemistry enough to have an idea what it is... maybe it would be mentoned ni the service manual, if therw as one
probably not. I want to look around a bit, playing with the thought of taking one with me on vacation in the summer to go "treasure hunting" with the kids on the beach
To illustrate the kind of people they give engineering degrees this century:
A group of three people prepares a surprise party for someone in his old city of education and residence, where his parents still live (well, one village over).
These people have most of the preparation clearly in hand and there's no reason to assume otherwise for the rest
A fourth person, graduated "nominally" in Electrical Engineering then sends this person a poorly worded invite to come back to town for a day to do things absolutely out of the ordinary for their relationship at a moment close to the celebrated event. This fourth person is summarily confused that the target of the surprise party was on to it about 5 minutes after reading the invite
Obviously at the event we hear the original team was in league with his mother to have her call him a week before to come over and go shopping in town, which would have been completely believable, as they do that semi-regularly
This person, by the way, is the furthest from any kind of spectrum of the whole group. Unless stupidity comes on a spectrum too these days.
@Asmyldof You were complaining about the missing presence of well written guides made by respected manufacturers. Well after some searching on the net I found a handful.
If it's that the rather low quality ones took over, then that's a different thing
@PlasmaHH . . Metal Detector for on the beach with the kids : Most detectors above beginner levels are very good detectors. Don' spend a lot of money because it will sit in a storage for 364 days a year after the first use.
@DanielTork I never said any such thing. I wrote in an article that manufacturers make the delivery of guaranteed correct information limited and confusing, opening a path for people to find the organised, but badly informed, masses.
@Marla Until the sentient robots rise, then we'll be able to use them as intruder alarms
every now and then when I switch on my keysight multimeter I get some "message" where it says rHd in the upper right (I think) and displays (I think) 0500 ... switchitng it off and on again makes it work again... anyone knows what this refers to? I could findin the manual the "trigger hold" setup and it has a default setting of 500 but when it is related, why would it do that?
I'm trying to build a boost converter with current mode PWM control, but I'm stuck at selecting capacitor and resistor values for compensation. I'm using a LT1619 as the controller IC:
simulate this circuit – Schematic created using CircuitLab
Datasheet: LT1619
Boost converter parameters...
Anyone familiar with acidic copper electroplating? I am wondering why so many solutions use potassium sodium tartrate, what is it actually doing in that process? all the sites only say "use it, its good"
@PlasmaHH Not yet, but if you leave some info I might make time to look at it the weekend and give it a 50/50 I'll work it out before I get bored of it
simulate this circuit – Schematic created using CircuitLab
hi .. this circuit is how to stepdown a 220v to 5v so you can mesure voltage using microcontroller .. my question is how to know the value of each resistor and capacitor and what is the equation for it and i want to know why he use...
I'm trying to build a boost converter with current mode PWM control, but I'm stuck at selecting capacitor and resistor values for compensation. I'm using a LT1619 as the controller IC:
simulate this circuit – Schematic created using CircuitLab
Datasheet: LT1619
Boost converter parameters...
