Questions tagged [diy]

Do It Yourself. Build, modify, repair something without the aid of trained professionals.

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2
votes
0answers
58 views

RF signal Multiplier or Chopper

I'm trying to design a circuit that "multiplies" two signals. I have an electrical unit with two separate circuits. One circuit drives the other one with a square signal. The width of the square ...
4
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1answer
91 views

Choosing LED brightness

I am planning to build an electronic fencing scoring apparatus for training purposes in our club (so no FIE certification required, it's a pure hobby project). For hit indication, I want to use a ...
0
votes
1answer
97 views

Whats the simplest heating surface for a DIY project

I'm trying to make a very small (3x3 cm or less) cup or surface that will heat to around 200C. The surface needs to be dry and I only care about heating the surface and not any particular volume of ...
3
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3answers
238 views

Running a brushless DC motor on low rpm using servo tester

Background I'm working on a gift for the wife for Christmas - an electric bobbin winder (a winding machine/spooling machine) - which will work in the same way as this machine: It winds yarn on ...
0
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0answers
69 views

Adjustable voltage doubler circuit across resistive load…doable?

Disclaimer: what I am proposing is dangerous, and I know that. I would discourage anyone, regardless of expertise from undertaking such a pointless risk to their health and home. After my recent (mis)...
0
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0answers
31 views

IR Proximity Sensor Not Responding

I'm trying to build an IR proximity sensor using a simple tutorial found online. Here is the schematic and here is the link of the tutorial : https://www.instructables.com/id/IR-Proximity-Sensor-1/ ...
0
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0answers
22 views

Converting camcorder internal microphone to external pluggable via jack

I am trying to convert excellent microphone from sony vx1000 camcorder to external one pluggable via jack. I removed the microphone and was able to find schematics I tried connecting jack directly ...
16
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9answers
4k views

Cheap and safe way to dim 100+ 60W Incandescent bulbs

For my wedding reception, we are building ~25 lighting fixtures with 4 bulbs each (fixture per table for dinner). For aesthetic and budget reasons, these are 60w "Edison-style" bulbs which we want to ...
1
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2answers
128 views

Correct solar panels to pick for drone-mod

After this, I think I will take a course on electrical engineering (fuzzy from school days). I'm trying to add some flexible panels (they were <14g a panel)) to my drone (HS120D), to possibly give ...
10
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2answers
1k views

How this DIY High-Speed Probe doesn't reflect signals?

I am reading The Art of Electronics, page 809 and 810, where they show this probe: Which is a DIY probe, made out of a RG-178 coaxial cable, in series with a 953 ohms resistor. I wonder why the 953 ...
0
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0answers
24 views

Should I remove negative photoresist before drilling

The manufacturers guidelines for pre-sensitized positive photo-resist board suggests leaving the resist in place until after the drilling. I wondered if the same advice is applicable to negative ...
0
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0answers
116 views

Universal LVDS controller board

I am trying to salvage a Chimei Innolux V236BJ1 LE1 panel from an old LG TV. Planning to use T.RD8503.03 but I can't find the datasheet. I need it to see if the pinout are compatible, or if not, to ...
7
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5answers
7k views

How to get 20 V from a USB-C charger?

I want to power my DIY stuff with a MacBook Pro USB C charger. The label on a charger says that it can provide three different power profiles: 20.2V - 4.3A 9V - 3A 5.2V - 2.4A There is a ton of ...
3
votes
1answer
15k views

Creating a home made ultrasound transducer

I don't know how ultrasound transducers (transmitters) are made, is it possible to create a home made ultrasound transmitter with a custom specific range 1MHz or more? If it is not, would a 3D ...
2
votes
1answer
116 views

How did static charge ruin my control board?

We have a Thermia geothermal heat pump that was working fine up until we had a particularly bad thunderstorm. Lightning took out the power for a while and burned up a DSL modem, a router, and a IP ...
1
vote
0answers
58 views

DIY high fidelity audio using delta sigma adc

This question may be too general, but I will include all the details that I can. My end goal is to achieve a super high-resolution spectrogram of any recording I choose to make. By doing some tests I ...
2
votes
1answer
758 views

Metal enclosure for custom car stereo project

I'm thinking about developing a custom car stereo, and it surprised me that there's no DIY enclosures for this purpose. I've just found plastic boxes in the 1 DIN size which can be installed into an ...
4
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5answers
224 views

DIY generator. Simple and small

I have read many posts on this site and everyone seems very competent, so here I am... very new to this. I'm trying to learn how to convert a motor into a generator. I'm just getting a bit overwhelmed ...
1
vote
1answer
115 views

SMD transistor die vs DIP transistor die [closed]

Is the die of SMD transistors different from die of DIP transistors with a unique part number? Is the power transmission of a transistor dependent on its package type or chip type ?
1
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0answers
76 views

12VDC Switching to 17VDC high amerage

It's been years since my undergrad work as an EE. I am a physicist and medical researcher now, but, as a startup, we all take on anything we can. Let's face it... 12VDC high current PSU's are cheap. ...
2
votes
1answer
3k views

What's wrong with my voltage multiplier segment?

The moment I learned about voltage multipliers I was really excited. What an awesome way to kill yourself! I found a high voltage multiplier guide and using the image below, I created my first ...
0
votes
1answer
40 views

What happens if you only energize one pole in a 2-pole 240 V circuit?

I have an Intermatic pool timer box that has two 120 V poles. The LINE has two pins (Pin 1 = L1, Pin 3 = L2), and the LOAD side has two pins (Pin 2 = Load 1, Pin 4 = Load 2). Currently, I have ...
0
votes
1answer
136 views

How to measure the output impedance of a valve preamp?

I was trying to measure the output impedance of a DIY preamp for the past couple of days without any luck. Each time, I got to the same result of around 3K3 ohm, which is unbelievably low. This is ...
0
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1answer
60 views

Correct type of wire for simple DIY projects involving soldering [closed]

I am making my own bluetooth speaker which will require me soldering wire to PCBs etc. However, I am unsure of which type of wire to buy for the project. I understand that positive and negative wiring ...
0
votes
1answer
186 views

Identify these components for bluetooth speaker [closed]

I am wanting to make my own DIY bluetooth speaker (first time electronics project) and I have found several good Youtube videos on the topic. However when it comes to finding the actual parts, I am ...
1
vote
2answers
813 views

Custom/DIY Metal-Core PCB?

I would like to fabricate a slight enhancement over the metal-core PCB's shown here: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=6071 Specifically, my application requires 2 LED's of ...
0
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2answers
145 views

Getting circuit input on a computer

(Modified repost from stackoverflow since it might be more suited to this site) I wanted to try building an arcade stick starting as simple as possible(ICs and basic electronic components as opposed ...
10
votes
3answers
39k views

Is there way to construct an 18650 battery pack with built-in balance charging? Or is balancing not very necessary?

This is my first post here. Err, I'm a DIY enthusiast especially in electronics. I'm actually building a portable Playstation 2 Slim with an IPS display, so that it would look like a Wii U controller....
1
vote
3answers
1k views

DIY 5V power supply from phone charger

I want to power 25 adafruit NeoPixel LEDs. According to the specs they draw a maximum of 60mA at 5V each. In total that would be 1,5A at 5V. I would like to use a 2A usb phone charger as a power ...
9
votes
1answer
2k views

Soldering BGA components DIY

If I understood correctly, current BGA components contain solder balls under the package. Do I still need additional solder paste to put on the board, or the amount of solder on the component contacts ...
2
votes
1answer
2k views

How to connect RJ45 (female) Link LED

I need a bit of help. I have some Jtron RJ45 sockets (do a quick search, for a better picture), and they have LEDs integrated. I want to connect these sockets to a PCB and get the internet in (added ...
1
vote
1answer
2k views

LED Shoes - circuit diagram ok?

I want to put LEDs into my shoes, specifically the Nike Air bubble (by drilling holes at the inside of the shoe and dropping them into the bubble). I also want the ability for it to light up when ...
0
votes
1answer
450 views

DIY battery Pack Cell amperage difference

I have individually tested the capacity of ten 18650 batteries with my iCharger 4010. My question is, how much ampacity difference is ok when packing them in parallel ? The following are the readings ...
0
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1answer
135 views

How to buy electronic components for little projects? [closed]

I have some projects in mind, some of them under development, and I want to design PCBs for them with little SMD components. So I have been choosing some of the ones I need in websites like Digikey or ...
0
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1answer
81 views

FR 5311M Programmable servo? [closed]

I bought this odd servo motor called the FR 5311M from FeeTech, which is advertised as a programmable servo motor which can switch from position to continuous rotation by flashing it with FeeTech's FR ...
6
votes
6answers
4k views

Techniques for building 'Bed of Nails' testing board

When testing a complete circuit board a 'Bed of Nails' can significantly reduce time and errors. What are some techniques for making a DIY Bed of Nails? ...
0
votes
1answer
561 views

2D DIY capacitive panel

I'm planning on replacing lights with smart bulbs (e.g. Yeelight RGBW) and replacing light switches with capacitive panels connected to Arduinos which will send data to RPi, which will then control ...
0
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2answers
1k views

Replicate PCB design on stripboard

I'm thinking about making a DIY project (this one). I'm a complete n00b, I just have some theoretical knowledge about electronics from some university courses, and I'd like to learn some more. I was ...
-1
votes
1answer
235 views

DIY battery from scratch. Is it possible? [closed]

Batteries are expensive. I want to be able to store about 30 kW worth, but even the cheapest kinds of batteries, like Lead-acid, or Salt Water batteries are too much. I've looked into reviving dead ...
2
votes
1answer
155 views

Device power requirements

I am designing a device and I'm confused on calculating my total amperage required. I have designed this device to have 3 main circuits in parallel that all take 5 V from the same power source: ...
1
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2answers
2k views

How to Make DB9 F/F serial RS232 mini gender changer?

I want to connect My "USB to RS232(Male end)" to my NanoVolt Meter having RS232 male port. To make both communicate i need to make DB9 F/F serial RS232 mini gender changer. Any Circuit or suggestion ...
0
votes
1answer
7k views

series charging three 18650 batteries with three chargers off the same 5V supply [duplicate]

being from a CS background I am a complete noob at this. I'll keep this short. I have a couple of 18650 batteries that i salvaged from an old laptop battery. I want to make a balanced 3S charger with ...
-1
votes
1answer
173 views

DIY TDA2822N computer microphone

I am using the following circuit to make a computer microphone. The "speaker" component is the computer's microphone input. The problem with this circuit is that somehow I can hear capacitors ...
1
vote
1answer
460 views

Meanwell vs generic power supply [closed]

I am currently planning out a custom 3D printer build which will run on a 24V 600W power supply. I have specked out for a $90 MeanWell supply from eBay, but I've noticed similar generic power for ...
0
votes
1answer
161 views

Building homemade low inductance capacitor

i am trying to build a low inductance capacitor. I could just buy a doorknob capacitor but i don't wanna pay that much. So i know that you need a dielectric, i am using overhead transparency sheets. ...
0
votes
1answer
235 views

Which end is host in a USB-C to USB-C charging/power cable?

I have two different kinds of DIY USB-C connectors...one kind that is rigged to be a "host" USB-C connector (pulled-up with a 56k resistor per spec), and the other is rigged to be a "device" USB-C ...
1
vote
1answer
362 views

Flashing light circuit

Problem: I have built a wooden model of a lighthouse. I want to make the light in the house flash. I am can use a soldering iron. I have no circuit experience. Question: How can I build a simple ...
0
votes
1answer
213 views

Hard drive won't power on, is this the reason why? [closed]

I have a somewhat old, but functional (used to be, actually) hard drive, model Samsung HD103SJ, which I use for backup purposes. This means this is not a fixed unit. Since a few weeks ago when I ...
-1
votes
1answer
65 views

Creating a linear actuator

so I am working on a project that involves opening and closing a two piece chamber made of rubber. I have to get a good seal on the chamber so no gases can pass through between the rubber pieces and ...
1
vote
0answers
209 views

3.5 male to IR Transmitter - Receiver [amplified] back to 3.5 female

Trying to recreate a DIY headphone with IR transmitter and receiver I already searched this is what I have found so far: 1.- http://www.instructables.com/id/DIY-Infrared-transmitter-for-iPhone-iPod/ [...