Great video, as always very useful. I am considering building this project. I wanted to check-back for your experience....now that we are 5 years later. Could you recover many batteries? or did they have other issues? thank you /chriV
This is all ridiculous. You ended up spending multiple hours and times as much money as just buying some very low cost, ready made tester. Even if you happened to have all the parts, as salvage rather than paying regular market prices for, it is a colossal waste of time to reinvent the wheel. Also your PCB design was ridiculous. Terrible waste of solder. If your traces are too thin to support the current, stop wasting so much solder and leave more copper on the PCB instead of etching an excessive amount away, plus there was no need to make it so small if that was the problem with having enough copper. Plus the design is terrible for lack of mechanical fortitude where the USB connector meets the PCB, apparently relying only on the solder joints for something meant to be manipulated with that mass? There is no good reason to build this and several reasons not to.
B5-47 üç adet labaratuvarımda var 35 yıl boyunca kullanıyorum. hatıraları var arızalandı 2 si. El kitapçığına ihtiyacım var onarmak için bu konuda yardımcı olabilirmisiniz. Teşekkür ederim.
That final thesis is such a pile of horse***t. Any guesses why all the old building have giant antennas. The buildings themselves were the generators and capacitors. The antennas recieved the power from the draw stations. It's a one time cost to build and the infrastructure can be supplemented fragmentation to use amongst entire cities. This is a propaganda piece. Says all the right things and follows up with we must mine the rare earth minerals for solar and keep the farce that the windmills are anything but dangerous and maintenance disasters. Funny. May want to look how much crude, not veggie, not man made oils, but crude is necessary to maintain the function of a windmill. Then follow up the devastation to bird populations. Then add they can only hold so much power in their transfer cells that they burn through cells at an exponential rate because you cannot stop wind. This had the potential to invite creative minds to look past the propaganda, but instead tries to sell it. Good try
I like this little monster! If you cover the decimal point with black paint inside the display, then the reading on the screen is millivolts and no more confusion. The dropout voltage of the LM317 determines the highest resistance that can be measured. For 100 mA current, the highest resistance is given by the equation Rmax=10*Vin-30. For 5V, you can measure up to 20 ohms. For 9V, maximum is 60 ohms. However, power to your resistor is W=R/100, so heat will change reading. A 60 ohm resistor would receive 0.6W! But that isn't possible with a 9V rectangle heavy duty cell, they instantly drop to 5 or 6 volts under 0.1 A load. Alkaline cells would drop to about 7-8 volts under the same load.
If the capacity is 2200 or more mah need every cell 3.7v bms. And another for full wave ones so it could balance every cell so there's no way it will discharge in charge cycle easily m
This is the BEST video on ATX PSU conversion on the internet. Well done @kasyantv! Years ago, I modified an old ATX PSU, making Voltage _and_ Current adjustable, following to this video. This PSU has served me well for many years (and it still is). Adding buck converters is for pussies. This conversion is super cheap and solid. Any good electronics engineer should be able to do it.
I made one of these back in 1982. Photons knock electrons off of the aluminum foil and electrons flow from the ground into the capacitor. That’s all there is to it.
Unless I am mistaken this is the circuit diagram available from early LM317 datasheet - 5A Constant Voltage / Constant Current Regulator with a few tweaks like using two pass transistors, 25 turn trimpots to trim Voltage & Current pots. Looking forward to your explanation of the circuit design & particularly how the current control loop works! My real curiosity is the purpose of the small stand alone circuit in the right back corner (behind output).
Do you have a video showing how to separate the 24v output from an old printer power supply to use the said output for other components that needs 24v power supply. Thank you.
thank you, it is extremely rare i make comments on RU-vid but i really appreciate your review very detailed and extremely helpful, well presented thank you, i have been restricted to a wheelchair over the last few years and my mig welder has sat there for years not used as it just way to big and even on wheels it just not practical, and this sort of welder looks to be the sort of thing that i can use, that is easy to move about light and i will be getting something similar, the sip T1400 and will be looking forwards to being able to do some small welding jobs again. you are a star thank you so much i wish there were many more like you, you made clear all the info people could want, i would suggest maybe if you do any follow ups or similar items you demo welding a couple of bits together and show how well the weld reaches in to the metal, i know you said you are no welder but many people that have never welded will likely watch and be interested in how easy or hard you find it as a novice. anyway take care and thanks again.
6:39 " to fully open" -> to fully close. This voltage, here 10V, is the voltage you need to reach 0.028 ohms between S and D. This is not the usual voltage, wich is 3,5V with the IRFZ44. Also, it can be considered like the maximal voltage applicable on the grid.
