2N4891 | Electronic Project Circuits

Posts Tagged ‘2N4891’

AC Dimmer for Lamp 6.3V

This the circuit AC dimmer low voltage For lamp 6V. While this friends may don’t see the advantage of this circuit. But I thinks first step advantage be something get learn the work of Triac. And have tall safety , because of use AC Low Voltage. Which the work is simple be The UJT Q1 will do the frequency give Triac work or make Lamp the bright. By have work rate of Triac can control with R1 or Be something dimmer there. You will may apply with the size Voltage the other all right. The Q1 use UJT – 2N4891 or other. A friend may gain an advantage from AC Dimmer for Lamp 6V , please sir.

Be the first to comment - What do you think? Posted by admin - September 19, 2008 at 6:22 am

Categories: Electronic Control Tags: 2N4891, AC dimmer, light dimmer control, triac circuit

Cricket Generator by 2N4891

This circuit gives sound handful that modifies interestedly, occurrence sound rate cricket
Fixed. By R3 should experience change the value C1,R5 and C2 effective that differently. A loudspeaker that use should is model Piezo Tweeter. The Transistor use get many the number. but that use Q1,Q2 be 2N4891 numbers or the number replaces. For power supply source use 9V. Detail other sizes see in the circuit request friends have fun Cricket Generator Circuit please sir.

Be the first to comment - What do you think? Posted by admin - September 11, 2008 at 9:11 am

Categories: Audio diagram Tags: 2N4891, Signal generator, simply audio, Tone Generator

Voltage Sensitive Oscillator by 2N4891

When Voltage of , Battery desperately will know get with this circuit. It is Voltage Sensitive Oscillator Circuit. By use pillar equipment be UJT 2N4891 equipment numbers are a little. A friend may like. By this circuit will beep alarm generator. When Vin be valuable lower Vz of D1. For the level Turn- OFF that want. The circuit will warn when Voltage of Battery be valuable lower the location keeps example easy accident and is the circuit that are valuable good please sir.