Monday, January 13, 2020

Water Level Indicator With Anti Corrosion Feature

This circuit is a Water Level Indicator With Anti-Corrosion Feature !!
In this circuit i used some wires with different lengths to detect the water level.
But to avoiding Electrolysis Corrosion we have to using AC voltage instead of DC voltage,
To do that i used IC NE555 to generate a low AC voltage. 
I explained that in this video: https://youtu.be/wrMyt4tC5oQ 

Parts List:
IC NE555
Red LED (4pcs)
Green LED (4pcs)
Red LED (4pcs)
Yellow LED (6pcs)
Resistor 33K
Resistor 1.5K
Capacitor 100nF (9pcs)
Capacitor 1nF

Water Level Indicator With Anti Corrosion Feature

 Circuit:

VCC=12V

Water Level Indicator With Anti Corrosion Feature
 Video:


Saturday, January 4, 2020

Transformer dot convention detector

This circuit is Transformer dot convention detector that can detect the polarity of any transformer.


Transformer dot convention detector

Dot convention refers to the phase shift between input voltage (primary) and the output voltage (Secondary) of any transformer. 
In some transformer applications its very important to know the transformer polarity (dot convention). 

Transformer dot convention detector



Parts list:
IC 555
IC 4030
IC LM358
Capacitor 100nF
Capacitor 10nF
Capacitor 100uF(2pcs) 
Capacitor 220uF
LED (2pcs)
Banana Plug and socket (4 pair)
Push button
Diode 1N4148 (4pcs)
Resistor 100K (2pcs)
Resistor 510R (2pcs)
Resistor 100R
Resistor 33K (2pcs)
IC Socket 8 pin (2pcs) 
IC Socket 14 pin



Circuit:

Transformer dot convention detector


Video:



Friday, December 27, 2019

Dimmer With Touch Switch Without Arduino or any Microcontroller

This circuit is a Dimmer With Touch Switch Without Arduino or any Microcontroller.
I just using two ICs (LM324 and CA3130).  The output is PWM signal and its duty cycle can be adjusted by two touch pads from 0% to 100%.
Interesting thing in this circuit that the duty cycle remain the same even after turns OFF and ON the supply voltage.
I explained it in my YouTube channel here: 

Dimmer With Touch Switch Without Arduino or any Microcontroller

Parts list:
CA3130 or CA3140
LM324
Mosfet IRFZ44n
Mosfet Heatsink
Capacitor 100nF
Capacitor 220uF
Capacitor 1uF MKH
Capacitor 47pF
Capacitor 47nF
Zener Diode 5.1V
Resistor 100K (2pcs)
Resistor 20K (2pcs)
Resistor 1.5M (2pcs)
Resistor 3K
Resistor  6.8K
Resistor 510R
Resistor 51K


Circuit:

Dimmer With Touch Switch Without Arduino or any Microcontroller



 Video:

Wednesday, December 18, 2019

LED Chaser Without IC By Using Transistors Only

This circuit is LED Chaser Without IC By Using Transistors Only.
I explained the circuit in my YouTube video here.

LED Chaser Without IC By Using Transistors Only

Parts list:

Transistors (12pcs)
LED (22pcs)
Capacitor 220uF (2pcs)
Capacitor (680uF)
Resistor 1K (10pcs)
Resistor 2K (10pcs)
Resistor 510R (2pcs)
Resistor 5.6K (2pcs)
Resistor 10R
Resistor 20R
Resistor 33R
Resistor 47R
Resistor 51R
Resistor 68R
Resistor 75R
Resistor 91R
Resistor 100R
Resistor 120R



LED Chaser Without IC By Using Transistors Only


Video:

Thursday, December 12, 2019

Cockroft Walton voltage multiplier / Bug Zapper

This circuit is a Cockroft Walton voltage multiplier with 3 stages that convert the 220V RMS to 1860 Volt . 
It could be used for Bug / Fly Zapper or even for Ozone generator.

 
Cockroft Walton voltage multiplier / Bug Zapper

Parts list:

470nF 630V Capacitor (6pcs)
1N4007 Diode (7pcs)
LED
Resistor 51K 1/2W (2pcs)
Terminal 2pin

Circuit:


Cockroft Walton voltage multiplier / Bug Zapper


Video:

Tuesday, December 3, 2019

How to measure inverter Efficiency

Inverter Efficiency is the ratio between output power to the input power.
However you can find out your inverter efficiency in the datasheet or manual, but in some cases you have to measure that by yourself, for example when you make a DIY inverter.
I explained How to measure inverter Efficiency in my YouTube channel here.


How to measure inverter Efficiency

There are 3 types of efficiency:

1-European Weighted Efficiency
In this type we have to measure the inverter efficiency in 6 different loads power level then using following formula    

How to measure inverter Efficiency

2- California Energy Commission Weighted Efficiency
In this type we have to measure the inverter efficiency in 6 different loads power level then using following formula  

How to measure inverter Efficiency
 3- Peak / Maximum Efficiency
In this type we have to measure the inverter efficiency at many different loads power level as possible to see at which output power the inverter achieve max efficiency.  
There are no formula for it.

In This Video i explained How to measure inverter Efficiency in details by measuring the efficiency of my 300W Inverter.





Thursday, October 24, 2019

Random number generator with LEDs / Roulette

This circuit is a Random number generator with 10 LEDs (Roulette)  for picking random number between 1 and 10.

Parts list:
IC 4017
IC 555
LEDs (10pcs)
Buzzer
Transistor BC557
Capacitor 0.47uF
Capacitor 100nF
Resistor 1K
Resistor 3.9M (2pcs)
Resistor 15K
Resistor 510R

Circuit:

Random number generator with LEDs / Roulette

Random number generator with LEDs / Roulette


Video: