232 Results for "%EC%9D%B8%EC%B2%9C%EC%98%A4%ED%94%BC%EA%B0%95%EC%B6%94%E2%9C%9Awww%2Coptime4.com%EC%9D%B8%EC%B2%9C%EC%98%A4%ED%94%BC%20%EC%9D%B8%EC%B2%9C%EB%A7%88%EC%82%AC%EC%A7%80%20%E2%9C%9A%20%EC%9D%B8%EC%B2%9C%EC%98%A4%ED%94%BC%E1%98%9B%20%EC%9D%B8%EC%B2%9C%EC%98%A4%ED%94%BC%EC%82%AC%EC%A7%84%E1%98%9B%20%EC%9D%B8%EC%B2%9C%ED%9C%B4%EA%B2%8C%ED%85%94%20%EC%9D%B8%EC%B2%9C%ED%82%A4%EC%8A%A4%EB%B0%A9%20%ED%83%80%EC%9E%84"

LED Microscope Illuminator
Details from LED Microscope Illuminator
This project is using a couple of the OSRAM Oslon warm white 3000K LEDs. Initial experiments with these LEDs indicates that they will provide more than adequate light for an assembly microscope. I built up a board to go behind a 50 mm reflector, but...

Simple LM317 Power Supply with Current Limiting
Details from Simple LM317 Power Supply with Current Limiting
This is a simple power supply that can deliver 600ma of current from 1.5 volts to about 20 volts. It has current limiting and current limit indicators. The circuit is designed to be powered by a wall wart. The main components are two LM317, an op amp,...

Temperature /Pressure meter using Arduino
Details from Temperature /Pressure meter using Arduino
Today we are going to make a minimal pressure sensor integrated with temperature sensor. This pressure sensor is also able to measure the approx. altitude level. The main idea is to make it simple and to keep the PCB as small as possible. There are many...

Snap-On Powerbank Project
Details from Snap-On Powerbank Project
My finished product, a custom charging station for all of my power tools, based off of Snap-On's powerbank design.The whole box - finished product.Here is the basis of the project, a Harbor Freight 7 drawer 18" side cabinet, which I plan to attach to...

Triggered Sound Generator
Details from Triggered Sound Generator
The circuit Functional description The function is triggered either by a light pulse on the yellow LED (as a photodiode), by touching the input or by an electromagnetic pulse. After that, there is a pause of about half a second. And then there is a sound,...

Laser Air Assist Shootout
Details from Laser Air Assist Shootout
A while ago I built myself a DIY 3D printed CNC machine called the MultiBot. Recently I picked up a NEJE 30w laser module and have been trying to explore how to use this diode to the best of its abilities. Air assist has come up and I have...

Stereo Microscope For Around $100 !
Details from Stereo Microscope For Around $100 !
I wanted a large boom microscope for electronics. The options were not cheap, at least not in Canada. $500 for the scope, plus $100 shipping, plus sales tax, plus exchange on the Canadian dollar. The delivered cost of the scope would be around...

DJI FPV - Battery Breakout Mod [1]: First Tests
Details from DJI FPV - Battery Breakout Mod [1]: First Tests
Note: It has been some time since I started the project and it has become much bigger than I initially thought. Therefore, I will split the project into several sub-projects. Logs that disappeared here reappear there ;) Initial idea... My initial research...

Phase-change cooling system for a rack servers
Details from Phase-change cooling system for a rack servers
The system in idle mode, consumes about 1.5 kW of electricity, while inside the rack, a stable temperature of about -20 centigrade (in the summer about -17 centigrade). The refrigeration compressor is controlled by VFD, which, like everything else,...

Zerowatch
Details from Zerowatch
Concept videoThe zerowatch started off as a branch from the Pix-OS project as an initial hardware platform, but that was based on a stm32 in the early designs.i knew it wasn't going to be very user friendly at all (programming-wise), so i searched for...

SMARTDAX
Details from SMARTDAX
This project was made for myself only and i have not had the energy to make clear instructions for others so they can replicate it easily. I have plans to polish the project in the next week so everyone can get it up and running. If nothing else i would...

Emergency button : Reliable, Inexpensive & Design
Details from Emergency button : Reliable, Inexpensive & Design
In most apartments today, you can easily reach 10 or 20 wifi connections. So I decided to build a wifi connected device, which make things easy to communicate with the external world. As a lot of old age people don't actually have a wifi, i decided to...

Upgraded cheap 3D printer into a high quality
Details from Upgraded cheap 3D printer into a high quality
I changed my mk8 hotend and mk8 feeder into a e3D v6 hotend and mk9 material feeder. You can buy e3D v6 hotend on eBay, Amazon, Gearbest... from $ 10 to $20. You can download for free the mk9 material feeder and print it. The 3D printer is...

Street Camper
Details from Street Camper
The project was designed to use widely available materials effectively. It uses one sheet of plywood and one tarp. I am placing the design into public domain. Please modify and improve! Desired improvements include: better wheels...

Electric Fold-Up Canoe
Details from Electric Fold-Up Canoe
Videos: https://youtu.be/VoeL8jMJL2MColourful view from an electric canoe: https://youtu.be/FVPei1yZlzI No sore arms or shoulders the next day. No blisters either. Go out every nice day to a different spot for a change of scenery. Motor mounting...

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