Questions tagged [diy]

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

14 questions with no upvoted or accepted answers
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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 ...
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0answers
52 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. ...
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0answers
168 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/ [...
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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 ...
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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 ...
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0answers
3k 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 ...
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0answers
26 views

Mountain Bike Light Bar 18650 battery pack

I have a 6 Inch LED Spot Mini Bar Light which is used for vehicles, it uses 12-24 V and is rated at 18 W of power. I have some 18650 batteries which would work perfectly for this project. What would ...
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0answers
373 views

Has Anyone Ever Gotten a Delta DPS-400AB-5 A PSU to Work Standalone?

I got my hands on a Delta Hot-Swap Server Power Supply that's capable of 400W or 33A on the 12v rail. I've been tinkering with it for a few hours now and can't seem to find what pins are for the Pson ...
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1answer
67 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 ...
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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 ...
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0answers
429 views

DIY power supply 4 amps and 5 Volts

How can I make a power supply that is able to give 4 amps in terms of current and 5 Volts fixed? I've made a power supply before with variable voltage however the amp output never went above 1A. Which ...
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0answers
588 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 ...
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1answer
1k 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 ...
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1answer
1k 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'...