In a very affordable price level, a multimeter able to measure a DC current without interruption of a measured circuit can be found. UT203 UT203 from company UNI-Trend belongs to a category of clamp multimeters. A main reason to buy a clamp multimeter is usually a requirement to measure current flowing through a wire without […]
UT203 clamp multimeters “see” even a DC current Read More »
I recently salvaged a vacuum fluorescent display (VFD) from a piece of old test gear. The VFD is a 13 digit 7-segment multiplexed display and I thought it would look great in a custom digital clock or something similar. While it has the model number FUTABA 13-MT-54NA, I could not find any information on the
VFD Filament Driver Using 555 Read More »
If you need an isolated power supply for some part of your device, Traco TMH series DC/DC converters will create this second voltage to you. Imagine, that in the whole device we only have 5 Volts but for one integrated we need a higher voltage. Or we even have a suitable voltage, but for a
TMH 0515 – when one voltage is equal to two Read More »
So this is a 4×4 projected capactive touch board using Atmega32u4 and back-fire LEDs for each button. I want to send the gerbers to Seeed sooon so any advice/feedback is very much appreciated. It fits SoB 100x80mm but the top acrylic will sit right on top of the PCB as the dielectric properties of whatever
Nomech mini, a 4×4 capacitive touch button grid Read More »
Signal generators are a handy thing to have around the lab. They are perfect for testing inputs on a new hardware design and verifying the behavior of a circuit before connecting all the pieces together. In recent years these lab tools have not only decreased in size but also in cost. The result has been
Turn a smart phone into a signal generator Read More »
RK-1 is a wifi enabled mobile robot that you control using your iOS or Android tablet or phone that makes your Arduino projects mobile. I love building and programming mobile robots and because of my love of mobile robots, mobile phones/tablets and the Arduino, I combined them to make a prototype called the “RK-1”. THE
RK-1 – a wifi Arduino mobile robot for iOS & Android devices Read More »
“Sneaky, sneaky Apple,” said iFixit’s chief information architect, Miroslav Djuric, in an e-mail announcing iFixit’s teardown of 5th Gen iPod Touch 16 GB. “Thought you could pull a fast one on us by releasing a new, stripped-down version of the current iPod Touch without your customary fanfare? Not on our watch: It’s teardown time.” iFixit
Teardown: 5th-gen Apple iPod Touch Read More »
Slewing behavior of op amps is often misunderstood. It’s a meaty topic so let’s sort it out. The input circuitry of an op amp circuit generally has a very small voltage between the inputs—ideally zero, right? But a sudden change in the input signal temporarily drives the feedback loop out of balance creating a differential
Slew Rate—the op amp speed limit Read More »
From now, you´ll find in our store the top-quality capacitors from company AVX. A tantalum capacitor may be for many designers a component with a “smell of alchemy”. It´s not used as often as for example electrolytic capacitors, it´s more expensive and it doesn´t hesitate to fire off at improper handling. Despite these facts, it´s
Tantalum capacitors from the world-class producer on stock Read More »
A couple of weeks ago, I just post a review of my MCP23017 breakout board. As the board configuration allows to connect up to 8 of these boards, I decided to do it and see that it really works. My goal is interface 8 LCD displays with two wires: SDA and SCL from an I2C bus.
How to interface 8 LCD displays and 24 leds with only two wires Read More »
