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How to drive a PNP (as a switch) from a low voltage MCU I/O port, using only a Zener diode.

by vanderghast | updated April 12, 2023

drive   mcu   pnp   zener-diode  

Cargador de baterias

Cargador de baterias PUBLIC

El circuito de la figura se trata de un cargador de baterías de 12V aportando una corriente de carga de aproximadamente 50 mA, a partir de una fuente de tensión continua de 24 V.

by aiborra | updated January 25, 2022

cargador-de-baterias   diodo   pnp  



by johnthunder | updated September 12, 2021

and   bjt   logic   npn   pnp   timeout  

Tonebender 3-knob

Tonebender 3-knob PUBLIC

A three-knob Tonebender fuzz circuit. See for details...

by geedeebee | updated January 07, 2014

audio   guitar   pnp   stompbox  

Led Flasher

Led Flasher PUBLIC

This is a circuit which uses an npn and pnp transistor to briefly flash an LED every few seconds

by shagas | updated May 06, 2013

flasher   led   led-flasher   npn   pnp   timed   transistor  

Constant Current Source 0-4 mA

Constant Current Source 0-4 mA PUBLIC

by uk2012 | updated March 26, 2012

2n2907a   ccs   constant-current-source   diy   milliamp   pnp   tdcs   transistor  

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