A Mini weather station based on ESP-12. Include a BME280 or BME680 sensor chip on board, one or more DS18B20 onewire sensors. It's powered by a Lithium cell, can be for short time directly charged over present voltage input. A LDO with very low Iq included. Comes with voltage measurement for the connected battery. Hardware jumper for deep-sleep and a programming connector (charge the battery if +5...
Water detector with 4 level stages. Each stage makes the 555 timer to give a supply period for the buzzer. The active buzzer transmits sound with a pause period between 0.5-3 seconds, depending on the level detected.
This includes all of the electronics for the go-karts used for http://evgrandprix.org/ races. This includes a general schematic for the go-kart itself, a schematic for the "PEM Box", and a previous design concept that has since become obsolete.
An external voltage regulator for Arduinos and stand alone ATmega328P micro controllers. Offers reverse voltage, over votage, and over current protection. Output voltage is adjustable via a potentiometer.
This circuit uses the Buck/Boost Converter circuit for typically for use in a lab bench power supply. It features both adjustable voltage AND current using potentiometers.
Without a buck/boost converter,a computer power supply can only provide a 3.3V, 5V and 12 supply lines. With the buck/boost converter created with the aid of a 555 timer, adjustable voltage is allowed. A simple transistor is us...
1、Descripción del modulo:
EL LM317 es un circuito integrado regulador de voltaje positivo con tres terminal de National Semiconductor Corporation Ns. El rango de voltaje de salida en el LM317 es de 1.2V a 37V, y la máxima carga de corriente es de 1.5A.
2、Descripción de la función:
El voltaje de salida puede ser ajustado a través de un potenciómetro, el voltaje de salida sera menor q...