commercial zapper using a 555
#555 timer
#pulse generator
#commercial zapper
#electronic pest control
#high voltage
#oscillator
#timing circuit
#capacitor discharge
#ne555
#mosfet
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555 timer based plasma speaker
This instructable demonstrates the process of creating an audio-modulated plasma speaker using a flyback transformer salvaged from an old CRT display.
The audio-modulated plasma speaker operates by utilizing a high-voltage output from a flyback transformer to create a plasma arc that...
simple fluorescent inverter project
Fluorescent tubes contain mercury, which poses health risks. Improper disposal of these tubes is harmful to both the environment and health; therefore, recycling is a beneficial option. The 555 timer IC is utilized to generate a square wave voltage of...
Simple NE555 Sawtooth Wave Generator Circuit
A sawtooth wave generator circuit using a 555 IC is presented in the article below. The frequency equation is provided with the supply voltage Vcc.
The sawtooth wave generator circuit utilizing a 555 timer integrated circuit (IC) is a fundamental design...
Schmitt trigger light
The circuit utilizes the 555 timer as the core component, incorporating a photosensitive resistor (RG) and a resistor (RP1). The resistance of RG varies with light intensity, affecting the reset and set thresholds. The internal structure includes two comparators within...
Bar graph LED
The project involves using a 555 timer in conjunction with a 4029 counter and a 4511 decoder. The goal is to connect the outputs of the 4511 to a bar graph LED display, specifically to the "a-g" pins. The bar...
Sequential Led Flasher With Reversible Direction
A 555 timer controls a 74190 up/down counter. The 74190 drives a BCD decoder driver 7442. The 7476 is utilized to reverse the count at 0 and 9, resulting in an up-down-up-down counting sequence.
The circuit utilizes a 555 timer configured...
Automobile-ignition
The ignition substitute provides a constant power source for the ignition coil. Its frequency, 0.5-1.0 kHz, is that used by an 8-cylinder engine with an idling speed of 650 RPM, and the unit provides a rapid spark at a 17%...
9V to 13.5kV Inverter Circuit Schematic Diagram
This high voltage source consists of an inverter built around a transistor that generates pulses of 150V. These pulses are supplied to an inverter made of a thyristor and a capacitor, which is connected in series with transformer T2. The...
Ultrasonic-pest-repeller
This circuit utilizes a 555 timer integrated circuit (IC) configured as a square-wave generator. The base frequency is approximately 45 kHz, determined by the resistor values R1, R2, and the capacitor C1. The 45 kHz carrier frequency is frequency modulated...