2N2222 | Electronic Project Circuits

Posts Tagged ‘2N2222’

Simple Tone Oscillator Generator by 2N2222

This is Simple Tone Oscillator Generator. It is use transistor 2N2222 and 2N2907 be main part. By control tone sound with R2 – 50K and use 8ohm size. Detail other loudspeakers have a few , request friends see in the circuit please yes.

Be the first to comment - What do you think? Posted by admin - September 24, 2008 at 8:14 am

Categories: Audio diagram Tags: 2N2222, Oscillator generator, tone audio, Tone Generator

On After Delay with Mosfet

That be On After Delay Circuit. I uses mosfet in the circuit for delay easy more than the transistor. By have the work of the circuit be when press , S1 , an electric bell will not loud suddenly , must wait for follow the period of time that note. The Q2 will get back to the position or Status of Q1. Thus electronics bell will loud immediately after. The time haded delaied until finish already. If enhance the value C1 while delaied long go up. Note: Rs add keep for decrease the popularity of an electric bell , R1 add keep for decrease the time down and decrease the noise give Mosfet. The Q2 use 2N2222 or BC549 or C1815. The circuit is simple this , friends may like , request enjoy please sir.

Be the first to comment - What do you think? Posted by admin - September 13, 2008 at 7:39 am

Categories: Audio diagram, Timer Tags: 2N2222, alert alarm, power on delay circuit, Time Delay

Burglar Alarm Circuit by 2N2222

At this period the economy not good, Make have steal plentiful. We come to try build the circuit steal model to is simple better. The Alarm Sound (Super Bell) loud forever until will cut power supply to go out. When the Switch of the magnet Senate was opened or strip metal torn. The R1 stand give get the maximum score. Discharge late beside one of the the Switch of the Senate or zone metal goes out. Devalue R1 until will begin change the dot is born the sound , this circuit will use the electricity about 0.3mA that 6Volt use Relay 6V 500ohm. When use voltage 6V – 9V use Relay 9Volt 1200ohm. When use voltage 12Volt , this not difficult circuit. Request a friend enjoys and safe from steal please sir.