Hey /diy/. Need some help with a project. I have a small off grid solar system. No power on the property. A am a little strapped for cash, the problem i have is the battery is to large for the the solar array and its not getting a regular full charge. I ran a generator for 10 hours and used a dumb charger. It helped a lot and the battery has recovered somewhat. I can add another charge controller. The problem is thats fucking expensive. I need 120-130 amps going in an hour for 3 hours for a proper equalize stage. I cannot find a single source online of a high amp dumb charger... Comment too long. Click here to view the full text.
i would say, a little bit off center, close to the backrest, if you want to keep the hability to lean back a bit, if you dont want that and you want it point fixated, just use a plate and bolt it down on the middle
for my project, i am making the feet by myself with some angle iron, i want to make a standard 4 feet chair cause i want to make it "lazyboy" style, wich means, the hability to lean back...WAY back, and have a feet rest that also pops out as the backrest leans back
>>919690 yes i will, as soon i get another set, cause the ones i got are not mobile, they are fixed
as for the weight, the seat by itself doesnt weight much cause its totally stripped, no padding n shit, but, its also smaller than the one in your pic, my seat came out of a Fiat...BUT, i do have a larger seat like yours, first ill finish this smaller one to test and see what needs to be mod/change for the larger seat
I'd like to build my own soundboard. Never attempted anything like this, but I'd like to make all the circuitry and stuff by hand. Has anyone had any experience with stuff like this? Am I in over my head?
What kind of sounds are you looking for? Simple beeps and sirens can be done with oscillator circuits using chips like the 555.
Almost any microcontroller can play WAV files because those are just a sequence of voltage levels you dump to a DAC to play the sound.
There are also some chips designed specifically for applications like yours. ISD1420 can record and play up to 256 different sounds so long as the total duration is less than 20 seconds. This was used in 90s toys like the yak-back and billy bass. SPO256 is an alaphone chip used for things like speak-and-spell... Comment too long. Click here to view the full text.
>>919682 Do you mean a mixing board like pic related or a single-channel mixer? It's the same circuits either way. A mixing panel is just several single-channel mixer circuits combined so you get multiple outputs mixed differently. Potentiometers are arranged in a grid so the Y-axis is your different inputs and X-axis is pots controlling the different mixed outputs.
You want Stereo, so you'll need dual potentiometers. These are two separate potentiometers controlled by a single knob. You're working with... Comment too long. Click here to view the full text.
I want to build a wind turbine but braking is an issue due to tropical storms on the island i live on.
I was looking into a gear box when i thought maybe an electronic braking system would be able to more automatically regulate the speed based on the increase or decrease in speed while reducing the overall complexity.
there is a 1st power take off to a small generator, this is powering 2 electromagnets located in opposing fashion over a steel or other ferrous plate with slits cut into it. This will act as the electronic brake.
My theory is that with proper... Comment too long. Click here to view the full text.
>>919655 So, you want it to increase load resistance (shunt) as the voltage begins to spike from spinning too fast? That will slow it down but how much it slows down will depend on how hard it is to turn while dead shorted and if the wind can turn it well enough while dead shorted. There's always a chance that a really good wind could still spin it faster.
>>919655 electrical braking is problematic because the components have to deal with the energy as electricity roller coasters use eddy current magnetic brakes which are simple and pretty much foolproof, the faster it turns the more braking force is generated so i'm pretty sure you set and forget a maximum speed and then it works out to some curve of windspeed against turbine speed but i'm happy to be corrected.
>>919638 Coin batteries have very high internal resistance, it's like you've put the100 ohm resistor in series with it. To calculate it short the battery with the ampmeter, then divide the voltage by the current measured.
You're doing the math wrong. Using I=V/R like that gives you the current that would be going through the resistor if it were connected directly across the battery with nothing else in the circuit.
The purpose of an LED series resistor is to produce a voltage drop so the LED gets the recommended voltage. When the LED gets the recommended voltage it will draw the recommended current.
If the LED is 3v 20mA (0.02A) and the supply is 5v then you need the resistor to drop 2v. Vdrop = R / I = 2v/ 0.02A = 100Ω. Putting a 100Ω resistor in series with the LED will... Comment too long. Click here to view the full text.
ayy /b/ros, i need someo basic help with electronics: I have an arduino (80mA 4.5V output source) and I want to use it to switch a circuit ON/OFF wat do pic related, someone suggested it, but it doesnt work.
>>919461 I ended up going with the lower option, here is the final plan sheet. I generated it using CBdesigner. In the plan, I was going to do 1.75" thick, however at the last minute I changed it to 1.625" and after all of the processing, 1.5".
>>919462 I got it all cut down on a table saw, they are all ~.75"x.75". I say approx because it is a carpenter saw and even with extensive setup work it still wasnt perfect. Anyways, here is it all laid up prior to gluing.
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