Questions tagged [diy]

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

33 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
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 ...
2
votes
2answers
1k views

Schematic for a lipo battery bleeder overcharge protector

OK, so I am building a 12v (really 11.1v) 10000mah lipo battery. I am going to use it on campouts to run things like 12v fans and car chargers and run other high-current devices that couldn't be run ...
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 ...
1
vote
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. ...
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/ [...
1
vote
0answers
2k views

How to produce electricity with mechanical power/spring coil

As a home project I want to make a electricity generator which uses a spring coil, which when turned/wound(just like the mechanism in wrist watches) enough times will start unwinding and generate ...
1
vote
0answers
71 views

Making a 1m sized 16x24 screen so that the picture is recognizable

I'm thinking about making a flexible LED screen with 16x24 LEDs. I want the screen to be 1m wide so it will have big gaps between the LEDs. Because of the big gaps I think the image may be ...
1
vote
0answers
4k views

Best heating cable for a DYI heating blanket

I want to make an electric/heating blanket that will work with heating electric cable. I will use a computer AC adapter that output 19V 3.16A, and this dimmer to regulate the heat and a heating ...
0
votes
0answers
36 views

Making subwoofer for car, without amplifier

So, I have these two things and I want to achive a good subwoofer for my car: an 5.1 home theater system with a 20-30w 4ohm subwoofer and a radio player in my car with 4x45w 4ohm output for speakers. ...
0
votes
2answers
32 views

Connecting Headphone to Phone and Laptop via Switch

I am trying to build a small circuit which will connect my phone, laptop and headset with a switch. So in state 1, the headphone and phone will be connected and in state 2, the headphone and laptop ...
0
votes
0answers
44 views

Repetitive Problems With DIY Arduino EEG

I'm a hobbyist with only minor electronics experience trying to construct an EEG machine as part of a basic brain-computer interface. I'm following this tutorial for a DIY EEG using an arduino, but I'...
0
votes
2answers
37 views

What voltage should DIY laptop external battery have?

I want to make an external powerbank for my laptop, since its battery cannot be removed (MSI GP62M 7RDX). What voltage should my battery have? 18650 elements have nominal voltage of 3.7. My laptop ...
0
votes
2answers
54 views

Designing a Dew Heater

I am planning to make a dew heater for a camera lens to get rid of condensation, using resistors wired in parallel, then distributing them around the circumference of the lens. Diameter of lens: 65mm ...
0
votes
0answers
57 views

DIY Bluetooth speaker circuit won't turn on

I'm making a Bluetooth speaker and made a schematic which I'm using to follow to build the speaker. It's loosely based on this DIY video I saw online, here's the picture of the relevant parts I ...
0
votes
0answers
24 views

CFL Ballast Calculate Primary Turns

There are online designs that use a simple ferrite bolt 50 turn primary and 500 turn seccondary powering one 5 watt CFL. I attempt to customize it with: Specs: TDK Core (source) Vin primary= 6V DC ...
0
votes
0answers
55 views

BMS battery build DIY help

I am making a battery charger for a speaker using 4 18650 3.7V batteries. Now I know that I would need to get a 4S Lipo or Li-ion PCB, the only thing I don't understand is the current rating that I ...
0
votes
1answer
20 views

Can I replace the 433mhz modules on my homemade remote controller with a nrf24 transreciever

I built a simple 4 channel 433mhz transmitter and reciever because I can't afford a remote controller, the range is limited to 3 feet and nrf24 transreciever have longer range, so my question is can I ...
0
votes
0answers
47 views

Drill alignment error in diy CNC

I have made a homemade CNC for double sided pcb protoyping. I use flatcam to convert excellon files in gcode and then use UGS to send this gcode to arduino. I tried to drill a pcb size 180x140 mm ...
0
votes
0answers
30 views

Modding dictaphone into guitar amp. Technically possible?

Hey y'all First post, first experiment with audio equipment, not very proficient in writing in english. I sincerely hope someone is even going to read this mess of a post. Because of circumstances, ...
0
votes
0answers
163 views

Homemade TRRS Adapter for Microphone Only

I have a wireless monitor with a 3.5mm headphone jack in it, and I'd like to take the output from that monitor and stick it into my computer such that I can record it. However, I have only a TRS-to-...
0
votes
1answer
37 views

Questions about designing my own BLE-controlled LED device

This project is meant to get me familiar with designing my own PCB and working with lower-level components. I have experience with BLE using Arduino shields and BeagleBones, but I want to try building ...
0
votes
0answers
62 views

Can I use an Ethernet-cable in my DIY rpi project and run 5V / 8A through it?

I'm building a light installation and would love to use a sleek fabric-wrapped cable. As I need at least 5 cables I thought of using an Ethernet-cable as they come in nice forms and shapes. The ...
0
votes
1answer
58 views

Advice on my Transformer

Background: I need a transformer that can supply 6.3V (+/-1%, as per the heater's specs) and 25 A for a heater. As a result, I decided to hack a MOT by breaking off the bottom laminations and ...
0
votes
1answer
54 views

Understanding Power/Current/Voltage drawn by LED Strips

I am trying to create a LED lamp which will be powered up by a battery. Lets assume I want it to run the lamp for 1hr. My LED Strips operate at 12V with 19.2W/M. I am using around 1.7 Meters(198 LEDs) ...
0
votes
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
votes
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
votes
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 ...
0
votes
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
votes
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 ...
0
votes
1answer
77 views

Game Show Button DIY help

The club I am a part of at my school is currently trying to host a variety/dating show in which contestants will have the capability of controlling a button. There should be about 12 buttons to make ...
0
votes
0answers
28 views

Common rectifier (or source) to power testing equipments

I was thinking of a design of an all-in-one box that contains a DIY Oscilloscope, a DIY frequency generator, a DIY bench-top power supply (by a buck converter), and a multimeter (broken out from the ...
0
votes
0answers
610 views

How to switch a transistor when a radio signal is received?

I have a circuit which switches on by sending current to the base of one of its transistors. I'm trying to make receiver which can receive signals from a AM transmitter and send current to base of ...
-1
votes
1answer
2k views

DIY 4*18650 Batteries charger with TP4056 paralel problem with how to balance it

days ago I did this project like the pic which is a DIY for 4*18650 OR 6*18650 (NOW I MADE 4 AND LET`S STICK TO IT) Sony vtc5a charger 3.7 v with new tp4056 with protection (copied from one youtube ...