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Questions tagged [diy]

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

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0answers
43 views

Single key not working on DIY mechanical keyboard (xd75re PCB and Switch both work)

I have assembled my first mechanical keyboard using the xd75re PCB. I used a plate mount, and all of the switches were installed without issue (this PCB has hotswap). When I used keyboardtester.com to ...
0
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0answers
77 views

Help identifying a variable resistor's function

I have recently acquired a TC Electronics Tube Pilot guitar effect pedal. While exchanging the vacuum tube in it, I noticed that there was a 22k ohm variable resistor on the board. Can anybody tell ...
0
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0answers
8 views

connecting 6 bit 1 channel LVDS LCD to 6 bit 2 channel or 8 bit 1 channel LCD Universal Driver

I had an old laptop LCD screen with part number N154I2-L05 . It has 6 bit 1 channel LVDS connector input slot. so I have decided to use it instead of letting covered in dust, and I ordered an ...
0
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1answer
28 views

Battery wiring for DIY speaker question

could anyone tell me if i can wire the 12V battery to get around 20V out of the whole set? Right now it's wired in parallel which increases capacity but i need around 20V for the amplifier to have ...
0
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0answers
51 views

quartz and thermostat DIY reflow oven

Due to an error I have ended up with a quartz-infrared oven. 1kW and 9l, for turning it into a reflow oven. I have meant to get one with convection heating but this is what I have received... Not only ...
0
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1answer
103 views

Is this DIY high voltage AC generator safe to use?

Making a DIY type high voltage AC power supply from 40 W soldering iron, 220 V AC to 12 or 6 V AC step down transformer and 5 A fuse. These things are ALL connected in series to the 220 V AC mains. ...
1
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0answers
68 views

Boost converter voltage drop when charging battery

I made a 4s battery pack made of 18650 LiFePO4 cells that I'm planning to use for a mobile computing hobby project. My plan for charging it is to use a salvaged power supply from a computer along ...
0
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0answers
66 views

sg3525/ir2110 feedback problem

i use this schematic to build a half bridge power supply. but i have some problems and need some helps. the first problem is feedback.i think this feedback is not good beacause with this feedback ...
0
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1answer
91 views

What precautions should I take to setup a home electronics lab? (Living in the UK) [closed]

I'm soon to be buying a house in the UK and would like to setup an electronics lab in the garage (attached to the house).The type of equipment I'll be using is nothing out of the ordinary: ...
0
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0answers
36 views

How to Calculate losses from a DCDC Converter and their effects on battery life

I have a project that requires an odd voltage of 15DCV. The power pack that I plan to build will be two 12DCV 7AH SLA batteries with a DC-DC converter. So I know that my starting conditions will be: ...
0
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1answer
51 views

What determines the real world transformer ratio of a clamp on AC power meter?

The ideal step-up transformer, when the primary coil has 1 winding and the secondary coil has 60 windings would step up the voltage 60 times. With this improvised clamp on AC power meter, which is ...
0
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0answers
41 views

DIY Aux In connection to car stereo JVC KD-G151

I would like to connect my phone via jack cable (aux in) to my car stereo, which has no aux input (brand: JVC KD-G151). It is a CD player, so i wrote a silent disk to operate the cd player, and tried ...
0
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1answer
100 views

Gigabit detection DIY

Ethernet up to 100Mbps uses only 2 of the 4 twisted wires in an ethernet cable while gigabit is using all of them. Connecting an LED to one of the gigabit-only pairs should therefore make it easy to ...
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2answers
62 views

Combining a light therapy LED lamp with a light alarm clock - programmable dimmer

I live in a place where there is little daylight in winter, so I would like to use a light therapy lamp. Also, I would like to use it to wake me up, gradually increasing the intensity of the light ...
0
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2answers
127 views

What is this, a capacitor, if so what value. It's a mystery to me

If anyone know what kind of electrical component this is can you help me identify it please. Here is a picture, and I do t remember what I pulled it from.
0
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1answer
115 views

Selling DIY electronics online

Ok, I have no idea if this is the best place to ask for this kind of question but I've been scattering the internet for a while to find any info regarding this: Can we sell DIY electronics online? I'...
0
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1answer
120 views

handcrafted PCB problems

I have attempted to make this board below at home. Applied negative photoresist paint, left to dry for about 4 hours each side over a radiator, applied a double layer tracing paper with the artwork on ...
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0answers
44 views

Issue with powering MP3 module with Amplifier

I'm not a electronics engineer/student, so please escuse me if my query sounds a bit naieve. I have a Mp3+FM module (link) which I can power with a regular micro USB charger(or desktop USB). As the ...
0
votes
1answer
33 views

Replacement battery voltage mismatch tolerance?

I want to try replacing a proprietary battery in an electronic of mine as a first electronics DIY project. Thing is, the stock battery is 3.6V, and the phone battery I have on hand that I would like ...
0
votes
1answer
126 views

DIY Solar lamp circuits with 5252F explained?

I have a bunch of solar panels, rechargeable batteries, 5252F circuits, inductors and LEDs and while reading https://artists.scitoys.com/three_volts that seems to be enough to make my own solar-...
1
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2answers
85 views

What are these holes for inside a plastic junction box and how to use them?

I would like to mount a Raspberry pi case inside this box I bought and make it possible to remove it. I designed and 3D printed this part to fit on the holes and I would hotglue the Pi case on the ...
1
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2answers
58 views

Measure ~300kHz Induction Heater RF Power

I have been tasked to gather data from an old running 335kHz 5kW induction heater system. It has no outputs available to give amperage, power etc. Basically there is an assumption that the unit is not ...
0
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1answer
92 views

Can a house battery share common ground with the starter battery without interference?

I am quite new at this so bear with my questions. I have purchased two 12 volt batteries which I will connect in series for 24 volt and to be used as house batteries. I drive a truck which has a 24 ...
1
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0answers
37 views

What solution would be a low power option to signal a computer with button presses?

I want to make a custom input device with six buttons that when pressed signal computer to run a program. I would like to do this with a very low amount of power. What options are available to me to ...
0
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1answer
69 views

Amp for tweeter in bi-amping

I gonna make some 2-speakers Bluetooth PA system, and I chose bi-amping way with active crossover for do it. I have an 60W amp (battery limits) for my woofer. Skipping all the problems on my road to ...
0
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1answer
212 views

Amplifier Noisy Output (LA4597)

I have a problem with my amplifier circuit (LA4597). I tested it (12V). It turns on and the speakers and fine and silent. But when I try to add an audio source (RCA) within the circuit, the speakers ...
1
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1answer
117 views

4s battery pack, how to build?

I have 8 cells (samsung icr18650-26f), and I want to build a battery pack 4s 14.8v (4x3.7v) to power an LCD Controller Board that requires a 12v4amp input I have an idea of the design of this battery ...
5
votes
2answers
251 views

What is this wall-to-PCB connector called?

I'm trying to create my first device involving AC mains. It is a wall mounted energy meter. Essentially, it goes between the outlet and whatever device you want to measure and I'd like to have the ...
0
votes
1answer
52 views

Choosing a motor to lift window blinds [duplicate]

I'm looking to raise my blinds every morning using an rpi/Arduino and a motor. The blinds are lifted by a cord that loops near the bottom. I've checked that the cord requires about 20N force to pull ...
0
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1answer
97 views

Which Board Should I Use For High Frequency GPS?

This is a very general question, hopefully with the amount of information I provide you will be able to steer me in the right direction. I am trying to build a very versatile GPS receiver, with ...
10
votes
2answers
335 views

Why won't this DIY transistor attempt conduct

I've been trying to make a crude transistor device at home. So far I have not been successful. My electrical understanding is next to non existent other than what I've learned in the last 3 months ...
1
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1answer
63 views

Simple DIY laser alarm

Im begginer and currently Im trying to make DIY laser alarm (while laser is pointing at LDR sirene should remain silent and when laser is turned off, sirene should make sound). I found online ...
2
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2answers
2k views

Unbalanced to balanced audio signal conversion

When I was looking for some information how to convert unbalanced audio signal to balanced, it was hard to find info other than "use transformer" or "buy X device to do this". Then I found this ...
0
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1answer
381 views

How to make a small Spot welder for E-cig mesh coil welding?

I want to make a DIY spot welder I am planning to rebuild a non-rebuildable heating coil (Eleaf HW-N) and I need to weld two Non-Resistive(low resistance) wires. A Stainless-Steel net to a Nickel-...
1
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1answer
60 views

WIll the multimeter continuity test on the SOIC - DIP adapter spoil my IC?

IC : L9637D for ISO 9141 bi directional serial comm. Multimeter: Mastech I am mounting an SOIC 8 IC on an adapter(regular Soic to dip adapter), so I can mount the adapter on a bread board for use. ...
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0answers
82 views

replacing an old behinger power supply

I recently acquired a Behinger MX1 mixer, but without a power supply. Since Behinger no longer makes these mixers it has become very difficult too buy a replacement power supply. Which is why I ...
0
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0answers
36 views

Can I burn firmware on a DIY Pickit without needing a pre-existing Pickit?

I've been wanting to get into the PIC for some time now, and looked up a bunch of sources and tutorials on a DIY Pickit. However, every source I've seen has this one critical piece that's bumming me ...
0
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2answers
729 views

What do hot/warm wires mean?

I am making an electrical fridge for a school project. I am using a 12v Peltier cooler and using a 12v 30a power supply. I have all the wiring and everything already set up, and no matter what I ...
0
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1answer
202 views

How can I test the resistor on my USB connector?

I have purchased some USB-C connectors that I use to build my own cables with (I have separate "host" and "device" side connectors for various cable assemblies), and I was wondering how I might go ...
0
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1answer
90 views

Where can I find easy to understand instructions for real world applicable inkjet printed electronics [closed]

To explain what I'm trying to do a bit more, here is an overview of my ideas in this case. As far as I understand so far, it's technically possible to create complete PCBs including chips, memory ...
0
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1answer
50 views

How to enable auto detect AV inputs using dummy signal instead of actual video?

I got a TV with a cracked screen that otherwise works fine, which I managed to change the inputs to "AV" (3 RCA jacks). So I amputated the screen and now have a mini stereo with remote. The only ...
0
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1answer
186 views

What material to use for a capacitive sensor?

I'm doing a DIY project that I want to use a capacitive sensor for. I'm having a little plastic box and I want to send a wireless message when someone touches the top of it. I understand all the ...
2
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0answers
156 views

Help Identifying this circuit and understanding how it works

So I'm hoping to make a few modifications to my Computer case and have found that a number of the LED elements have an associated circuit to them. I want to be able to understand what I'm doing and ...
0
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1answer
117 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
65 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 ...
3
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4answers
2k 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 ...
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3answers
452 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 ...
6
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6answers
2k 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
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1answer
293 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
779 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 ...