build-electronic-circuits.com 2022-10-18 15:52 The Useless Halloween Machine This year’s Halloween project is a useless machine built with 555 timers. It’s a coffin with a switch. When you flip it off, a dark... build-electronic-circuits.com 2022-09-15 21:13 NOT Gate (Inverter) – Logic Gates Tutorial A NOT gate (or inverter) is a logic gate where the output is the opposite of the input. So you can say that the output is NOT the same as... build-electronic-circuits.com 2022-09-15 20:24 NOR Gate – Logic Gates Tutorial A NOR gate is a logic gate where the output goes HIGH (or “1”) only if all its inputs are LOW (or “0”). The schematic symbol for a... build-electronic-circuits.com 2022-09-15 20:24 OR Gate – Logic Gates Tutorial An OR gate is a logic gate where the output goes HIGH (or “1”) if any of its inputs are HIGH. So if A OR B is HIGH, the output Q also...
build-electronic-circuits... 2022-09-15 20:24 NAND Gate – Logic Gates Tutorial A NAND gate is a logic gate where the output goes LOW (or “0”) only if all its inputs are HIGH (or “1”). The schematic symbol for a NAND gate is like the AND gate, just with a circle at the output to indicate...
build-electronic-circuits... 2022-09-15 20:24 AND Gate – Logic Gates Tutorial An AND gate is a logic gate where the output goes HIGH (or “1”) only if all its inputs are HIGH. So if the inputs A AND B are HIGH, the output Q will also be HIGH. The logic or Boolean expression for an AND gate...
build-electronic-circuits... 2022-09-15 20:24 XOR Gate – Logic Gates Tutorial The XOR gate is a logic gate where the output goes HIGH (or “1”) if one – and only one – of its inputs are HIGH. XOR stands for Exclusive-OR. Check out its symbol and truth table below. The logic or Boolean...
build-electronic-circuits... 2022-09-15 20:24 XNOR Gate – Logic Gates Tutorial An XNOR gate is a logic gate where the output goes HIGH (or “1”) only if both its inputs are equal. So if the inputs A and B are both HIGH or both LOW, the output Q will be HIGH. The logic or Boolean expression...
build-electronic-circuits... 2022-09-07 18:10 Ohms Law – The Complete Beginner’s Guide Ohms law is a simple formula that makes it easy to calculate voltage, current, and resistance. You can use it to find what resistor value you need for an LED. Or to find out how much power your circuit uses. And much...
build-electronic-circuits... 2022-05-26 14:51 How to Build a Touch Sensor Circuit In this project, you will build a touch sensor circuit. It’s a cool and simple circuit that allows you to control an LED with the touch of a finger. And you only need three components, how cool right? You can build...
build-electronic-circuits... 2022-02-02 18:54 Cap Half Full #7 – Opamp basics and the 4000 series IC In this episode, we talk about operational amplifiers (opamps) and the 4000 series IC that Øyvind has been writing a series of posts on. We also accidentally came across a funny error on Arrow’s website . Listen to...
build-electronic-circuits... 2022-01-17 16:34 Repairing Electronics: Electronic Candle When visiting my parents for Christmas, my dad showed me three electronic candles that did not work anymore. He told me he had changed batteries and showed me that they did not show any signs of life. I tried to get...
build-electronic-circuits... 2021-12-16 16:27 Ohmify Gift Cards are now available A year of learning and building electronics can take you from knowing nothing to being able to build pretty advanced projects. Is there someone in your life that is (or could be) interested in electronics? We are now...
build-electronic-circuits... 2021-12-01 17:32 Build a Cool Christmas Tree Ornament in 5 minutes Do you want to build something on your own for Christmas, but don’t have much time? Or no experience? Then this project is for you. One of the easiest ways to make a Christmas circuit that looks cool when you don’t...
build-electronic-circuits... 2021-10-18 19:34 Halloween Electronics Project: Jack-O-Lantern In this Halloween electronics project, I’ll show you how to make a cool Jack-O-Lantern. I used a 3D-printed carved pumpkin, but a real one works just as well (or even better!). The project is based around three...
build-electronic-circuits... 2021-08-03 16:10 MOSFET Gate Resistor Do you need a MOSFET gate resistor? What value should it be? And should it go before or after the pulldown resistor? If you’re a bit impatient and just want the answer, here it is: You most likely need a gate...
build-electronic-circuits... 2021-06-08 15:18 How Does a 555 Timer Work? The 555 timer works by using three 5 kΩ resistors to divide the supply voltage in three. Two comparators compare these voltages to the input voltage, then sets or resets a flip-flop accordingly. Below is a diagram...
build-electronic-circuits... 2021-06-04 19:58 555 Timer Tutorial and Circuits In this 555 Timer tutorial, you’ll learn how to use the 555 timer to do fun things. One of the first things many do with it is to create a blinking light. But that’s just one simple example of the many things you...
build-electronic-circuits... 2021-05-27 20:55 Why Are Electronics Books so Hard? A few weeks ago, I went to the library with my wife. I checked out some of the electronics books they had, and something interesting dawned upon me… First, I have to say that I feel confident in my ability to build...
build-electronic-circuits... 2021-05-25 21:00 What is a Voltage Regulator? A voltage regulator is a component that converts a voltage to a lower (or higher) level. A typical example is if you want to use a 9V battery, but you need 5V in the circuit. For example to create a portable USB...
build-electronic-circuits... 2021-04-10 11:49 How To Edit Symbol in KiCad I was recently asked how to edit a symbol in KiCad. The question was actually how to stretch a component that was in the standard library, so I made a quick walk-through on how to do that. You can edit the symbol in the...
build-electronic-circuits... 2021-03-31 10:10 Me looking back at 5 years of Ohmify (it’s our birthday!) 5 years ago today, I launched Ohmify from my laptop while traveling in Colombia. I had spent the previous night in a tree hut on the beach to recharge my batteries. Now the moment had come… I was finally launching...
build-electronic-circuits... 2021-03-09 19:14 The Pull-Up Resistor: How It Works and Choosing a Value The pull-up resistor is very common and you’ll see it in digital circuits all the time. It’s just a resistor connected from an input up to VDD, the positive supply of the circuit. For example on digital inputs on an...
build-electronic-circuits... 2020-10-12 23:56 Cap Half Full #6 – Repairing an old amplifier In this episode, we repair an old Sanyo amplifier. In this episode, we find an old amplifier in the trash and we try to repair it. Will we able to? Listen and find out. Listen to the Podcast Show Notes Copyright...
build-electronic-circuits... 2020-10-08 13:00 Electronic Schematic Symbols To be able to read schematics you must know the schematic symbols. But you don’t need to memorize them all. To start with, it’s usually enough to know the battery, resistor, capacitor, transistor, diode, LED, and...
