74HC14

74HC14 is a member of 74XXXX integrated circuit series, it consists of logic gates. This module is also called HEX inverting Schmitt trigger. It is a high-speed CMOS Schmitt Inverter which consists of C2MOS technology. It provided high-speed operation like LSTTL, by using low power.

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Twist-to-Set Kitchen Timer

“A hand-held twist-to-set countdown timer for your kitchen. Recently I built an Attiny85 Twist-to-Set Kitchen Timer by bobson.h. After finishing the build, I found that the optical rotary encoder had a number of problems which I won’t go …

Serial Monitor With ILI9341 and BluePill

“Serial (ascii) monitor with 9 lines of 28 char. Baudrate from 2400 up to 256000 baud. Digital 3.3V or 5V input. Powered by a single Lithium-Ion battery. (3.7V nominal) Supplies: ILI9341 display (here a parallel version is used …

BEAM Solar Powered Pummer (Heart Shaped PCB)

“This is a project that I have been meaning to finish for over a year now. it is a heart shaped, BEAM based pummer circuit I made to charge up during the day and flash like a heart beating at …

Vectron Handheld

“Vectron Handheld is a retro handheld gaming console based on the 6502 CPU. It has five input buttons (up, down, left, right, fire) and a 1.8” 128x160 18-bit color TFT LCD display. I have developed an implementation of Pong …

Pulse Generator

“When you need pulses of any sort, long, short and with variable frequency you can use one or two 555 timers. That works, is easy to set up and is cheap. But it also limited to a certain range in …

Z80 Arduino Using Mega as Debugger

“Ever since the 80’s I’ve wanted to build a Z80 computer. I even bought the chips, but never used them. The reasons for this are varied. I never liked erasing and reprogramming EPROMs. My EPROM eraser died. I …

A digital quartz clock from scratch

“After 20+ years of programming, I wanted to get some understanding of the electronics that make my career possible. I had built the basic individual logic gates with transistors on a breadboard, but to build anything meaningful I needed loads …

Arduino CAP-ESR-FREQ Meter

“CAP-ESR-FREQ meter with an Arduino Duemilanove. In this instructable you can find all neccessary information about making a metering instrument based on an Arduino Duemilanove. With this instrument you can measure capacitor values in nanofarads and microfarads, the …

Make Your Own Sensored ESC

“In this project I will show you how a sensored BLDC Motor from an electric bike works and how we can create our own sensored ESC in order to let it rotate. Let’s get started!”

Transistor Radio Series - The 7 MHz Scratch Synthesizer

“I like making simple component-level radios. This Fall, I rekindled my love for making transistor radios and hope to slowly blog some circuits and fun. I’m warning you now — these circuits hearken the 1970s and 80s, SSD, EMRFD, old …