IC 555 12VDC to 220VAC Inverteuit and overview

This is a simple 12VDC to 220AC inverter circuit that can be used produces an AC output at line frequency and 220AC or different voltage by selecting transformer T1. The 555 IC is configured as a low-frequency oscillator, tunable over the frequency range of 50 to 60 Hz by Frequency potentiometer R4.

12VDC to 220VAC Inverter Circuit

The 555 feeds its output (amplified by Q1 and Q2) to the input of transformer T1, a reverse-connected filament transformer with the necessary step-up turns ratio. Capacitor C4 and coil L1 filter the input to T1, assuring that it is effectively a sine wave. Adjust the value of T1 to your voltage. The output ( in watts) is up to you by selecting different components.

Input voltage is anywhere from +5V to +15Volt DC, adjust the 2700uF caps working voltage accordingly. Replacement types for Q1 are: TIP41B, TIP41C, NTE196, ECG196, etc. Replacement types for Q2 are: TIP42B, TIP42C, NTE197, ECG197, etc.

Read More

Party Like Music Produced from Acid Machine overview and explanation

Overview

This machine works by making a LED blink in the frequency of the sound and a set speed rotates the image.

Explanation

On top of the machine is the circle that contains lines where the notes being played are displayed while rotating. The lines in the middle circle will be standing still when C is played which will go outward and all notes will be displayed on a keyboard in 12 steps. The musical frequencies are displayed in centimeters for the distance between the lines. The frequencies in the circle are transformed by a script made in PHP to display the notes. To find notes using the potentiometers on the synth, the circle can also be used.

A simple noise generator and a filter comprise the sound part of the machine as it is based on logic ICs. A binary counter and a resistor ladder are used to make the 4-bit saw which is the sound the synth generates. The rotation speed of the tone wheels is determined by the red knob or the potentiometer on the controller. The notes are played as an arpeggiator by the sequencer which comes is 2 different modes.

Read More