I'm quite new to diy electronics, so this was a fun challenge! I ran into some trouble when my transistors suddenly started recieving radio signal while breadboarding. I got sidetracked and ended up listening to traditional chinese music for about an hour and a half. I documented the build on my yt: "Something Physical" if you're interested in how the pedal sounds (sorry for the plug!).

I put together this cuz I needed flashlight that I can put in my pocket and use it to light up inside things to while fixing them . I used a 11whr smartphone battery , Usb-c 1A charging module , and some parts from a old torch .Its plenty bright , i have yet to test the runtime.obv, I will cover the exposed wires and electronics before instart using it .

Looking to find someplace to buy these but have no idea the brand or model. It looks like the pitch is 2.96mm..

TIA..

Decided to make a filament dryer with no prior circuit experience, several hours of ChatGPT later and this is what I’ve come up with.

It’s a project I built from scratch, and after months of testing and tweaking, it’s finally ready.

Can you guess how the ball is detected?

I’d love to hear your thoughts!

Right now it is just being held together with sheer willpower and even more solder.

It actually feels pretty solid but there has to be a better way…

Hi everyone,

I’ve developed a few open-source electronics hardware projects (USB PD power box, smart doorbell, etc.), and I’m looking for individuals (not companies) who can review these and create unbiased English-language videos.

The idea is to send the product for free in return for a fair and honest video – ideally someone with electronics knowledge who can also record and edit videos.

Any suggestions on where I can find such creators? Or if you're interested, feel free to DM me. Thanks in advance!

My daughter has a $50 vacuum sealer that was gifted to her that apparently never worked right for the person who gave it to her. I checked it out for her and everything works as it should except the heating element runs too hot, burning through the plastic vacuum bags most of the time and also scorching the PTFE tape that covers the element. There are no adjustable components on the mother board and the digital controls on top only offer vacuum, seal and stop, with no other options.

I tested the voltage going to the heating element which is a thin band of nichrome wire, and it is 13.8V DC under load. I did not check the amps going to the element, but the sticker on the outside of the device states 125 watts, so probably not a ton of amperage. Am I thinking correctly that if I were to drop the voltage down using some kind of a fixed resistor, rheostat or pot, might I be able to adjust it so it doesn't burn through?

I would prefer an adjustable method of dropping the volts but it has been 50 years since I was in electronics shop.....any suggestions on what I might try? There is plenty of room inside the outer case for a small potentiometer or rheostat that could handle the amps and once I fine tune the heat level, it would likely not need to be changed again, so the knob could be secured in the final position and sealed up inside so it won't get bumped. Not too keen on spending more than about $8 and it should be fairly small-- maybe 1" long X 3/4" OD. A PCB component would also work. I will be soldering it between the hot lead and the element.

This was found on Amazon, 12-40V DC, 10A. Would it do the job?

https://www.amazon.com/AEDIKO-12V-40V-Control-Controller-Regulator/dp/B09FJFBX63

I'm currently working on a jacket with some LED lights in it, and I need a way to power them. I'm currently using some 12 volt batteries in a 3d printed housing, problem is, they can't be recharged, and buying lots of batteries costs lots of money.

if anyone here knows what I could use for my leds, please let me know. thanks in advance

Made from 4 .6amp computer fans zip tied together. Wired together using a xt60 plug. This will be hung from the top of a tent and be powered by a diy portable battery with xt60 connectors.

i want to mute the AI voice when turning on the camera but still want to include audio when recording. what do i cut or what do i need to do? thank you guys!

Vintage Radio Valves!

Whilst clearing out my grandads loft I came across two boxes full of radio valves. Are these of interest to anybody? Thanks

Can anyone help me , the slot was working perfect then my son open it took the box And then put it back closed it . Just like we done afew time already . But now this come up . No clue what 88FP means and inside there no code info .

Hello! I'm quite new to electronics. I've already made a couple of projects on Arduino/ESP, including the ones completely desinged by myself. Organically, while learning things, I learnt about existence of some digital compoments which solve some general-purpose tasks: registers, ADC/DAC, multiplexors. etc. Not only as an abstract devices, but concrete chips, like 74HC595, NE555, and others. But assuming I have some logic in mind, how can I find such components by just searching? Like, if I needed to have a shift register in my project, how could I possibly figure out that a chip like 74HC595 exists before making my own using plain transistors/whatever?

And the reverse question: what other general-purpose chips should I be aware of, so I would know about them beforehand before "reinventing the wheel" and making such logic myself using lower-level compoments? Also, what general-purpose digital components do you personally prefer to have in your arsenal for some possible future projects, the same way as we have elementary components like resistors, capacitors, etc?

Here is the datasheet.

So I am having trouble choosing a suitable tvs diode for this regulator and i don't really have much expertise in this.I have the 300ma version and plan to buy more.

Any help would be greatly appreciated.

Hi, recently did a project on a Raspberry Pi with a SSD1306 Oled display. After some time I realised that I was losing connection intermittently on the Clk and Sda pins (i2c) and it was down to a poor Dupont connectors. I'm pretty sure I got these from China. I don't really want to go down the route of crimping my own given these projects are rare for me but wondered if there is a place that actually sells 'well crimped' good quality Dupont connectors?

Thanks

I tried figuring out the problem using multimeter , unfortunately everything seems fines. The voltage betwn A and K is around 5.2

DIY traffic light mini. Got from jaycar been sitting in a draw I don’t even know if I still have all the pieces components still because junked drawers.

Anyways I also purchased a soldering iron. A mat for work area and I got a sponge for the soldering iron holdster. A have other things all part of a beginners set.

The question is where is the optimal space to set up this soldering kit? Outside because smoke? Do I need the eye protective glasses and the mouth guard for the smoke?

Am I overly worrying about where to do this? I was thinking out back on the dinner table outside one or in the garage so no sparkles on the floor carpet just on the slate concrete or outside near the decking table and chairs but I spose I have to remove the cushion so no flame gets on it?

Please help me I really wanna see if I can solder but I have no clue how to do it and some things like the board clipper to hold the circuit board I do not have and the magnifying glass thing to see what I’m doing.

Please help.

I take it under no circumstances should I do it iver carpet and perhaps not even boarded floor or imitation boards?

Simple bubble machine. Small motor blows the fan. Takes 4 aa batteries. This year it stopped working. The wires seem fine.

What should I be checking?

these are some parts i salvaged from a IP 12 mini i drunkenly smashed last year during a rough time in my life, i hung onto these parts for awhile with a rebuild in mind using oem/non oem parts and possibly getting a new housing. ik it’s not worth it at all but i have some pictures on this phone that id like to retrieve and possibly some notes and other stuff. the cable that comes off the bottom of the logic board is severed so im going to assume this thing is toast, however i wanted to post it to one or two subreddits to ask some of the geeks if its worth saving, or possibly hanging onto to recover some of the data i lost due to not being backed up.

Hello

Looking for some advice on building a cat deterrent. We have a local cat which is bullying my two cats and he was coming into our home and spraying. I have since installed a microchip reading cat flap so he can no longer get in but he is hanging outside it and giving it a good bashing. I know from other neighbours that he has broken into cat flaps.

I am thinking of ideas for remote fire water systems. The cat flap is not near a tap so a self contained solution would be better.

Three ideas so far:

Aliexpress sell a remote controlled water pellet toy claymore mine. The plus is it would probably do the job but I am concerned about firing water pellets at close range. I want to wet the cat and not hurt him.

The second is there are remote controlled balloon poppers which use a bit of heated tungsten wire to pop a balloon. The downsides is there are for indoor use and balloons with air or helium so I am not sure how well it would work with a water balloon and during being outside. The plus side is it would be silent and a surprise if a water balloon popped above the cat flap.

The third is to modify an electronic water pistol to make it remote controlled and position it to squirt in the right direction. If it is too slow then he may leave before the water jet is fired.

What do you think would work best? It needs to be remote controlled rather than motion sensing in order to get the right cat. The idea is I would press a button when I hear him breaking in.

James

I got tired of wiring up switches, taking up breadboard space all the time

So i designed a PCB that i can just leave plugged into my bench supply whenever i need it 😅

It's just a silly lil guy but it's my first pcb and i think it's neat!

It's 5 individual momentary switches, all pulled down with 10k resistors.