Ronelex Electronics Repair/ Laptop BIOS or NOVO Button Problem
I got trouble in formatting and setting time of the Lenovo Ideapads unit that I repair. I can't enter bios by just pressing F2 and I can't find the NOVO Button until I find this guide on Youtube.Com which helps me to solve my problem :). Just watch the video and learn how to access the BIOS of Lenovo Ideapad Laptop Models.
For more Electronics Repair/ Troubleshooting Guide,... [ Continue reading... ]
Ronelex Electronics/ Coin Based Water Dispenser System
In this Fully Automated Coin Based Water Dispenser System, it is using a microcontroller and a sensor. In the picture below it shows the sequence on how the system works. The system is using Infrared sensors which is used to detect the presence of the glass and the sensor give the signal to the controlling system to check if the glass is placed and if the glass is in position, it starts... [ Continue reading... ]
Ronelex Electronics/Automatic Tubig Machine
Coin Operated Water Dispenser aka Automatic Tubig Machine(ATM) Sample Video
This is a Coin Operated Water Dispenser Example by chad which is known by many as Automatic Tubig Machine(ATM) sample video on how it works. I hope you learn something on this video can be use as a guide.
For more Electronics Repair and troubleshooting guide, please click here.
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Ronelex Electronics/Switch Mode Power Supply
Some of us like technician want to learn more about the Switch Mode Power Supply commonly called SMPS. This is a special type of power that uses a chopper transformer instead of an ordinary metal core transformer. We have to learn how this type of power supply works for us to have knowledge on how to repair this switch mode power supply if we will encounters problem related to power... [ Continue reading... ]
Ronelex Electronics/Making Isolation Transformer
According to Wikipedia, "An isolation transformer is a transformer used to transfer electrical power from a source of alternating current (AC) power to some equipment or device while isolating the powered device from the power source, usually for safety."
[caption id="attachment_145" align="aligncenter" width="498"] Photo Credits to:... [ Continue reading... ]
Ronelex Electronics/Microcontroller Course
Here are the contents of this tutorial:
Analog Electronics which includes about The Components of Electricity, Resistor, Capacitor, About Ohm’s Law, Inductor, Diode, Transistor, Relays and OP-Amps.
Digital Electronics which includes The Introduction to Decimal, Binary and Hexadecimal and The Introduction to Logic Gates
[slideshare... [ Continue reading... ]
Ronelex Electronics Repair/China Board TV Signal Problem
This is for all China Board TV that can't receive any channel signal but the tuner is good and you may not need to replace or reprogram your memory IC. All we need to do is to copy the settings on it. If you don't have the original remote controller of the unit, you can use the Universal Remote Controller
Step 1 :
set your remote to code 006 and press the 2 three times and the adjust... [ Continue reading... ]
Ronelex Electronics/Biasing Current of an Output Transistor
In this article, we will be focused on getting the bias current of an output transistor of an amplifier circuit. According to wikipedia:
Biasing in electronics is the method of establishing predetermined voltages or currents at various points of an electronic circuit to set an appropriate operating point. The operating point of a device, also known as bias point, quiescent point, or... [ Continue reading... ]
For those who are looking for a copy of the schematic diagram on this type of Analog Multitester and other brand using the same circuit diagram, you can download the schematic diagram in here. credits to Deantyne
[caption id="attachment_135" align="aligncenter" width="500"] credits also to: Deantyne[/caption]
For more information about this topic, you can visit Elab Forum for the discussion about this kind of Analog Multitester and... [ Continue reading... ]
