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Hello my dears I would like to present here my attempts to make a self-contained 7-segment display based on WS2812B colour LEDs, my own PCB and a case printed on a 3D printer. The display shown here I will test with an Arduino and give full operating codes for download. Heart of the... [Read more]
Power indicator two channels 120 led KA2281 2 × 5-channel LED level meter for stereo tape recorders and home stereo This is an integrated circuit consisting of a 2-channel LED level meter driver, designed for use in systems. Can be configured as two channels and one channel. Features... [Read more]
Since my girlfriend is a flower freak, she marked something to stick in the ground, forget about the fact that it is in the ground for a few months and in the meantime find out about how much water is in the ground (aka "when it's best to water" ), preferably via WiFi. With WiFi,... [Read more]
Last December I acquired a second-hand printer, or rather a 3D printer substitute, the Anet A8. Without going into too much detail, the manufacturer's use of what was probably polycarbonate as a frame material very quickly became apparent. I tried to save the cracked structure with... [Read more]
Hello, Tried the 0-30v 0-10a power supply circuit works fine, sprint layout drawings on PCB and gerber files. velleman k7200 new printed circuit board control card Single layer PCB 91.6X72.2mm This laboratory power supply will undoubtedly be a valuable device for both a professional... [Read more]
Hello my dears Here I would like to present a review and my own improvements to the modular third hand/stand/phone holder project from Thingiverse. Modular Mounting System by HeyVye The modular third hand/handle/phone stand system shown here is based on a design by HeyVye of Thingiverse,... [Read more]
Hello my dears I recently found an interesting 3D printable object on the Thingiverse website and decided to do a short review of it here. I think the idea is quite good and worth promoting. SMD Component Magazines by robin7331 All the information can be found on the model's author's... [Read more]
The question of plus and minus in a mains socket is repeated quite often, it is quite natural to associate the two poles of the socket and the two colors of the wires with the battery but wrong . In the case of a cell or battery, we have direct voltage (DC), the mains supply is alternating... [Read more]
Hello my dears I would like to introduce you to my mini-tutorial of the free Blender program. The tutorial will focus on showing that although Blender is more artistically inclined, it is also suitable for preparing a simple 3D printable element. I will map the 3D element from a photograph... [Read more]
Practically the best device for checking a fuse is the sight and the tester designed for this. We check the fuse under load. The meter can, in short, turn us into a balloon. A simple sampler from the market for PLN 5-10. This one was slightly modified for my needs. We start checking... [Read more]
Can a battery "have amps"? We can correctly say the capacity in ampere-hours or the maximum current that an alkaline battery can generate, this current depends on its internal resistance. The internal resistance of a cell will depend on the type of cell and the degree of discharge... [Read more]
The receivers draw a certain current from the battery or accumulator. How long they can operate depends on the capacity of the cells that make up the battery. If the receiver draws a current of 1A, it will take a 1Ah charge within an hour. A 10Ah battery could theoretically power... [Read more]
The project aimed to create control board for half-bridge topology with the possibility of setting the frequency using a computer program. Additionally, control board has synchronous sampling of the current waveform for accurate phase and amplitude measurements and plotting the graph... [Read more]
Hello my dears I will present here a detailed description of the implementation of a noiseless, energy-efficient file server based on the Banana PI M1+ and an SSD connected via SATA. I have made the final version of the server shown here (480GB+60GB on SD) at a cost of around £500... [Read more]
Silicon Labs and Arrow Electronics, in collaboration with Amazon Web Services (AWS) and TE Connectivity (TE), are launching a contest to spark technology innovation to inspire the next best smart home idea. Smart home technology transforms our lives, infusing a new level of convenience,... [Read more]
Hello all. Some time ago I bought a LED current and voltage meter (4 bit, 0-100V, 0-10A) on the Chinese website. According to the description, it was to provide values with a frequency of 3 times per second. It turned out differently, i.e. he gave them less than once per second, which... [Read more]
. Hello my dears . I recently got my hands on two Ania R612 radio receivers made by Unitra. Here I will show their interior, give clear pictures of the boards with commentary and post the full manual and catalogue notes of the components that are inside. Introduction and teardown... [Read more]
Hello my dears I will describe my experience with it here ASM1061 i.e. a pass Mini PCIe SATA (two ports), which allows you to connect additional drives SATA even for a laptop. I'll test it here with two drives 2.5" . I must admit that I became interested in the subject out of... [Read more]
Hello my dears Here I will present a collection of 3D designed wall organisers/mounts for various power supplies and tools. All in one theme - and finally a library of 3D models in .blend format for download (from this you can produce STLe). I printed the models shown here on my Creality3D... [Read more]
Hello! This is my first post in this forum section, so please bear with me :) I was motivated to write this article by a post by user p.kaczmarek2, located here: He presented the operation and construction of a cheap USB hub, i.e. Chinese, which did not impress with either quality... [Read more]
Hello my dears Here I would like to share one simple way to improve the quality of photos we have already taken, namely clever light and shadow correction in the program Gimp . I'm putting this method in the 3D printing related section because the brightness and contrast problem I've... [Read more]
Recently, many Xiaomi smartphone users have faced a very unpleasant situation. During normal operation, a message about the system desktop manager crash suddenly appears. The error message looks exactly as shown in the first photo. The alert remains on the desktop all the time or... [Read more]
Physical values cannot be determined with absolute certainty. Tools and measuring systems always have a certain tolerance and are not fully immune to disturbances that introduce a certain degree of uncertainty into the measurement. When it comes to uncertainty of measurement, the... [Read more]
Hello my dears Today I will present a "smart" WiFi socket BlitzWolf BW-SHP8 , which is simply an electrical socket with a relay that can be controlled by an Android application from anywhere in the world. This socket also offers additional functionalities, such as viewing energy consumption,... [Read more]
Hello I honestly admit that I do not know yet what exactly will be built. For now, I am trying to run what I can from the interfaces available in the system. What is F1C100s? It is a Chinese SOC in the QFN88 housing with: - ARM9 processor (not to be confused with Cortex A9) - 32MB... [Read more]
Hello my dears I will describe here in detail how to configure Raspberry PI together with OctoPi to operate the 3D printer over the network WiFi . This is a very convenient solution because normally when we want to print something we have to manually put our model file (or more precisely:... [Read more]
The project was created at the request of my 8-year-old son - a fan of car driving simulators. Due to other responsibilities, it took me about 14 months. For construction, I used mainly what I had in the garage - eyelet plates for connecting wooden constructions are the foundation... [Read more]
Hello, this time something without microcontroller :) As we have plenty of masks because "we are prepared" I decided to add my 3 cents. I present an adapter of my own design for the 3M mask. It is used to connect an antibacterial/anti-viral filter (at least that is what the manufacturer... [Read more]
The material most often called thermal grease is probably one of the most important, but often overlooked, components of the cooling system of a PC and other devices. However, we often forget to buy this measure, after spending hundreds, if not thousands, of zlotys on new computer... [Read more]
The terms AC and DC refer to electric current. Indirectly, also tensions. DC - direct current - means direct current. In theory, it is a power supply whose parameters are constant over time. Most often we say that about all sources that give a constant voltage. However, no one can... [Read more]
