Content for 74HC4040


The 74HC4040; 74HCT4040 is a 12-stage binary ripple counter with a clock input (CP), an overriding asynchronous master reset input (MR) and twelve parallel outputs (Q0 to Q11). The counter advances on the HIGH-to-LOW transition of CP. A HIGH on MR clears all counter stages and forces all outputs LOW, independent of the state of CP. Each counter stage is a static toggle flip-flop. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Building a Circuit to Detect High Frequencies: The Bat Detector!

“Bats come out at night and can be difficult to spot—but with this bat detector, you will be able to track them down! While some bats do make audible clicks, most produce inaudible clicks that are between 20kHz and …

ESP8266 with 3.5” KeDei LCD module

“This repository describes an idea of easy hack (depending on your DIY skills) of the cheap KeDei LCD 3.5” module (320x480 pixels), originally sold as a display option for Raspberry Pi, to simulate more standard LCD connection (seen in …