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Voltage Controlled PWM Generator
This is a PWM signal generator that will control the duty cycle of the output pulses, from a DC voltage level input from any source. The circuit uses a comparator and a triangle waveform to operate.
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Triangle wave generator
A very simple and yet useful circuit for generating triangle wave. It uses two OP-AMPS and the oscillation frequency is chosen from a resistor and a capacitor
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Light / Dark Activated Relay
Three very popular and effective light/dark switching circuits are put under the microscope. PCBHeaven tech labs will test, present and compare those circuits for you to choose the best to fit your needs!
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TV Remote Control Jammer
This is a very simple circuit to have fun with your friends and not only. This circuit will generate a series of infrared light pulses that will block the remote control signals to the TV, the stereo, the DVD and generally any remote control that uses IR light.
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The Origin Of Internet
Do you really now the origin of the internet? This article is the general accepted (perhaps unofficial) story of the birth of what we today know as “Internet”.
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Electronic waste and recycling
Loads of electrical and electronic devices are dumped every day uncontrolled in landfills polluting fields and the underground water. We have to know that electronic waste is highly toxic and full with carcinogenic substances and in a heavily polluted environment such as ours there has to be some kind of guidelines in order to prevent or minimize further pollution. |
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PC Cooling Methods
In this article I will try to present the most known and commonly used ways of cooling a PC. Each method will be described in terms of operation, advantages and disadvantages against the other methods.
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To WiFi or not to WiFi
Within this article, we will discuss the affects of the wireless networks on the human body, the risks and precautions that can be taken to reduce those risks. The article is based onto official researches for the wireless networks and the use of microwave bands for communications.
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