Content for CD4093

CD4093

CD4093B consists of four Schmitt-trigger circuits. Each circuit functions as a two-input NAND gate with Schmitt-trigger action on both inputs. The gate switches at different points for positive- and negative-going signals. The difference between the positive voltage (VP) and the negative voltage (VN) is defined as hysteresis voltage (VH).

Simple Transistor Checker

“Transistors (derived from transfer resistance), are the basic building blocks of our technological world. You may have a box full of assorted transistors or you may have them segregated by type in individual labelled draws or boxes. In either case …

Parallel Sequencer Synth

“This is a guide for creating a simple sequencer. A sequencer is a device that cyclically produces a series of steps that then drive an oscillator. Each step can be assigned to a different tone and thus create interesting sequences …

mains frequency measurement unit

“The circuit board presented here enables the exact mains frequency measurement of the power supply system (50 Hz and 60Hz). It is universally constructed and can be operated with a RaspberryPi 3/4 as well as with a USB-TTL …

An open source Rain Sensor and controller

“One major issue when dealing with sprinkler controllers is rain starting to pour during sequences execution, because in this case it is useless – if not damaging – to water a garden or plants while nature is already taking care of that …

Single Digit Voltmeter with LM311

“I wanted to design a logic probe as a tutorial, but there were many good ones in the web so i have tried to design a single digit voltmeter. This circuit is a design, i am unable to test it …

Tiny and cheap lab generator

“Function generator is a rely useful tool in the lab, a simple version can be build at home, there’s a lot of examples on the Internet, some are much more complex and powerful, but this one is intended to …

Light To Audio Oscillator

“Light Sensitive Audio Oscillator project is a fun loving project which will create different sound effects depending on the light falling on the sensor”