Questions tagged [diy]

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

Filter by
Sorted by
Tagged with
0
votes
2answers
600 views

Microphone PCB Questions [closed]

I've been working on a project to build a microphone in DIY after finishing my audio engineering internship, but it seems like my knowledge in electronic isn't good enough to fully understand what i'm ...
2
votes
2answers
6k views

Problems trying to wire a USB-C cable

I have been trying to figure out how to custom wire a USB-C to USB-A cable for a while, with no luck.I have tried some different connectors, but wanted to get some outside ideas on what I might be ...
3
votes
3answers
1k views

What are an amateur's options to put a high-end IC on a board? [closed]

I'm actually an experimental physicist who does software-development for a living. So my knowledge basically stops at writing micro-controller programs and putting them on a breadboard, and hooking ...
0
votes
2answers
547 views

Female mono jack connector 6.3mm

I'm building a DIY pedal effect for my electric guitar and I have to connect the input and output jack connector, but I don't know how to do it. The connectors have 3 pins, one is the tip which it is ...
0
votes
1answer
161 views

Powering 4 12V 0.45Amp fans off USB?

This question actually has a few parts. Basically I have 4 12V 0.45 A computer fans,which I want to use in a DIY cooling pad project I'm currently working on. I know that as per the standard USB 2.0 ...
0
votes
1answer
1k views

Analog current and voltage adjustable power supply design

I saw this circuit on some recommended YouTube channel and I thought it would be a good start to building a custom PSU, learning some stuff along the way. I would like to keep the circuit analog for ...
-3
votes
1answer
2k views

DIY a j-link debugger

I want to replicate THIS jlink debugger according to my own needs. But I can't find it's schematics and firmware anywhere. Is illegal to replicate it or distribute it's source? If no, then where can'...
0
votes
1answer
2k views

DIY ultrasonic sensor with LM358

I would like to make an ultrasonic sensor. For reciever part I have found this scheme: (source: www.kerrywong.com/2011/01/22/a-sensitive-diy-ultrasonic-range-sensor/) Instead of LPC662 I would use ...
0
votes
2answers
130 views

How do I properly calculate the requirements for an on/off switch?

I'm building an arc lighter to learn more about electronics and I'm not certain how to calculate what I need given the components I have. Do I go off the rating for the battery or the combination 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 ...
3
votes
2answers
599 views

Connecting home elliptical trainer to TV power

I'm attempting to use a TV addiction to help motivate an exercise routine. To do this, I am going to connect an elliptical trainer to the power of a television set (flatscreen). Here is my plan: I ...
1
vote
1answer
123 views

Connecting a switch to a jack

Firstly i want to mention that I am not even close to an engineer or i have absolutely no experience with electronics. Here is my case. I have an old laptop with broken power button. It is not just ...
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 ...
1
vote
1answer
200 views

Are there any problems with my circuit design?

I am new to designing circuits but I have spent a lot of time researching for this project. I have been designing an automated indoor garden for my home. To save space, there will be 3 gardens stacked ...
1
vote
1answer
814 views

Building your own camera module [closed]

I would like to know how difficult it is to build your own camera module. For instance, how difficult would it be to assemble the Raspberry Pi camera module from scratch? The reason I'm interested ...
1
vote
2answers
123 views

DIY flashlight - USB plug [closed]

I want to do something like the first of the gadgets in this video: https://www.youtube.com/watch?v=aEo_nJ3iUYI (0:07 - 1:00) It's a flashlight connected to the micro USB port in my cell phone, but ...
0
votes
1answer
4k views

How to wire a three phase bridge rectifier

I am doing a DIY three phase AC motor power generation project. I can understand the basics of electronics, and also understand how the wires are wired in a single phase rectifier. However, for three ...
2
votes
2answers
2k views

Help with fixing LED night light that won't turn off

Software guy here, with limited practical electrical engineering skills (barely used a soldering iron since the university). :) My daughter has a LED night light using inductive charging. After ...
1
vote
1answer
82 views

AUX input outputting +4v Causing reset of connected smartphone

I've added an AUX input to my Mercedes Audio 10 casette radio using an online tutorial. Essentially hooking up a 3.5mm jack direct to the output of the audio processor. I'm familar with this ...
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 ...
2
votes
5answers
346 views

How to power up 50 LEDs? (DIY 'fireflies' project)

I want to install lots of tiny LEDs lights in my garden (at least 50). I DON'T want high voltage cables in my garden so I am thinking in getting a high power, low voltage transformer to power up these ...
0
votes
2answers
394 views

Connecting 12V fan to LM317 DIY PSU circuit

I am working on a simple adjustable DIY power supply using an LM317 voltage regulator. J1 in the image below represents the transformer rated at 18VA, which rectified produces about 25V DC. The output ...
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
2answers
702 views

Astable Multivibrator not oscilating

I am pretty new with this stuff, just learning. I wanted to make a simple PCB, and as this was my first project, I decided to go with astable multivibrator circuit, to oscillate 2 LED's using ...
2
votes
3answers
169 views

Regulations (if any) for using electronic devices built by myself in my house

Are there any rules and regulations for using electronic devices built by a user in his own house in the UK? Like for example, if I build a DMX control system (from scratch - i.e. PCB and enclosures ...
2
votes
3answers
290 views

Presensitised-PCB Build Method

After completing many basic circuits on stripboard and premade PCB I've decided to try my hand at making my own PCB. Following some other forum posts this seems do-able but will likely take some trial ...
0
votes
2answers
840 views

Necessary parts to build a DIY smartwatch [closed]

I want to create a simple smartwatch that can receive text messages via Bluetooth/wifi from a computer. However I start doing research on necessary components and either get completely professional ...
0
votes
2answers
105 views

LED circuit for 4 modules

I bought several LED's bulbs last years and several failed because crappy drivers. I plan to combine 4 of these modules together and make a single custom DIY LED lamp. Here is a photo of the modules ...
0
votes
3answers
448 views

How could I make a 1kW fan heater consume less electricity? [closed]

My fan heater has only two settings, 1kW and 2kW. But what if I wanted it to consume only 200W per hour ? Could I find a device to put in between to supply less electricity, how would I do that?
1
vote
1answer
2k views

DIY car audio noise when the source device is charging from the same power source

I have a hobby in electrical engineering so I built my own car audio system given the fact that it didn't have any before. It's basically two pairs of PC speakers adapted with some resistors and ...
1
vote
6answers
3k views

How can I build a simple USB signalling device?

I would like to construct a simple device that plugs into a USB port and sends the computer a signal (i.e just a 1) when a user presses the button or switch etc. I ...
5
votes
6answers
2k views

Would it be possible to make a solid state transistor by hand?

I am curious, would it be possible to fabricate a modern BJT/FET transistor with hobby/garage tools only if size and aesthetics was not important? Which materials would one use and how would one ...
1
vote
1answer
4k views

What is the difference between 4-, 5- and 6-band resistors?

I have been buying PSU DIY kits from eBay and I am learning a lot the PSUs that I've soldered together use the LM317 and the resistors used in R1 and R2 can change the outgoing voltage. The LM317 PSU ...
0
votes
1answer
118 views

Identify this electronic component from DVD drive [closed]

I got this component from an old laptop dvd drive. It was placed within the laser assembly. Could you tell me what this component may be?
4
votes
2answers
967 views

Most efficient way to power a 5 V circuit from a 14.8 V battery

I am making a DIY Raspberry Pi laptop. So far I have found a suitable board that will drive my display (M.NT68676.2A). From research I have found out that it will run off of anything from 12 V to ...
2
votes
3answers
531 views

Put outputs of 2 computer power supplies in series?

I've been working to figure out an LED lighting project for my classroom for a while now, readings on this site has helped. One part of the solution is to combine in series computer power supplies (...
3
votes
1answer
874 views

Maximize efficiency and brightness of diff color, cheap, 5m 5630 SMD LED strip lighting

I'm a science teacher and we are going to explore different design/effects of grow-light setups this year in class. I've gotten some great ideas for this project from reading from this stackexchange ...
3
votes
1answer
601 views

How to find connections on board? - DIY Keyboard from Old Laptop

I have a project that I have hit a wall on. I need your guidance! I need to find the spots on the board for the 4 USB connections. The attached photo is of the board. There are 4 connections I need ...
-1
votes
1answer
75 views

What type of processor will I need to control a mobile front camera? [closed]

I have a mobile front camera (like this one). I want to build a wearable camera out of it (like this one). However I want to make this from scratch and not have to resort to using a Raspberry Pi. ...
1
vote
3answers
5k views

DIY Multi-Input Audio

Edited, see bottom of this post. What would be the best method for preventing damage to multiple audio input devices that are connected to a home made audio patch panel? Im wanting to make a device ...
1
vote
1answer
3k views

Can I charge a 12V 2A NiCd battery with 18V 14.6A?

I have a 12V 2A NiCd battery which I want to charge. I have a power unit that puts out 18V 14.6A. Can I use it to charge it? Would the battery just draw the current it needs or would it always put ...
1
vote
1answer
3k views

DIY 2.4 ghz antenna for Bluetooth Speaker too cut or not to cut

I just built a Bluetooth speaker using a Sure Electronics AA-AB41136 Bluetooth 4.0 Audio Receiver Board. The reception was not great since it is a PCB antenna contained in my speaker box which is made ...
0
votes
1answer
500 views

Will my car's AM/FM antenna boost the signal of a tablet/carputer GPS?

I'm installing an Android tablet as a carputer in my '97 Hunk-o'-Junk Crapwagon, and saw a reddit post detailing a carputer install where OP linked his Jaguar's antenna to a USB GPS adapter. OP also ...
0
votes
1answer
97 views

which power supply rating do I use for my diy led light panel?

I'm building a led light panel using 24 x 18W SMD 5630 72LED Rigid Light Strip Tube Bar Lamp Bright White 12V 1800LM connected in parallel so whats the power supply rating Specifications for each ...
-2
votes
1answer
3k views

Fuse for a 18650 pack [closed]

Are there any fuses that i can use to protect a 18650 battery pack. I have a 2s8p which is rated at 12.6v 21.6A. one battery is rated at 4.2v at 2700mAh.
0
votes
1answer
85 views

Simple and easy-to-charge battery for a DIY power generation project with varying voltages and currents?

I'm converting a decorative windmill to a power generation device. I'm looking for a battery that can charge with wildly different voltages and currents and be simple and easy to charge. It doesn't ...
2
votes
2answers
766 views

transformer windings

I have a 900 watts transformer from a microwave, this used to have a secondary voltage of around 2000 volts (for the magnetron) but I removed it. I wonder if by using 15 turn secondary that will give ...
0
votes
1answer
489 views

Can my DIY Arduino be powered with 12V battery via lm2576 switching regulator?

I have lm2576 switching regulator circuit with output constant 5v/3A. Can I use it with a 12V battery and connect it to power my Arduino?
0
votes
1answer
492 views

Inductive Charging Mouse [closed]

I recently bought a wireless gaming mouse and while functionally its great, the battery life is a little less than I would like. I tried to mitigate this by adding in another rechargable AA battery (...