Free electronic circuit design and schematic diagram
This is a Shunt Series Pair Wideband Amplifier circuit. This circuit has four feedback loops, they are two emitters feedback, shunt-shunt feedback and an AC feedback loop(series-shunt). This is a very stable circuit and can be used for wideband amplifiers and low gain. This circuit requires +12 supply that restrict the “headroom” of the second resistor. The emitter of the […]
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This is Complementary Pair Vertical Deflection Pre-Amplifier circuit. This circuit is modification circuit of Vertical Deflection Pre-Amplifier for 100MHz scope. This circuit remove few resistor-capacitor combination from the original circuit. That components can be removed because they tweaked the response of the amplifier at high frequencies, so no problem. The second two transistors receive +2V from the two 1N4733 5.1V […]
Read moreA R-2R ladder circuit as the binary current divider that is finest application in digital to analog conversion. This video shows how to analyze the R-2R ladder circuit. In this video, the circuit has three nodes. First, this video shows analysis of the resistance on third node. Since the 2R is connected in parallel with 2R, they will give the […]
Read moreThis is a video about high speed analog to digital converter. Analog to digital converter (ADC) is a device that is used to convert an analog signal into digital. For example femtocharge, it implements the gain trough capacitor scaling, each pipeline stage has its input. Reducing the capacitance will increase the voltage. Here is the video : The femtocharge has […]
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Tremolo effect produce an amplitude modulated signal. Unlike vibrato effect that produce frequency modulated, this tremolo effect will produce the same effect as quickly turning up-ad-down your volume control repeatedly. Here is the schematic diagram of the circuit: Q1 is general small signal audio transistor, you can use almost any type of NPN small signal transistors. MFC3304P is a voltage […]
Read moreSometimes, people confuse about the different of transistor and tubes. This video explains the different between transistor and tube. Basically, the transistor and tube has similar function. But the construction between them is really different. This video shows the diagram of the typical triode tube. First, comparison between NPN transistor and triode tube. The label of NPN transistor is base, […]
Read moreThis is a soldering high-brightness LEDs video. This video demonstrate a simple way how to solder the high power LED. First, use some of solder paste and place the solder place to the heatsink pad, then plant the LED to the pad. In this video, to dry the solder paste, the steinel programmable hydrant is used. The temperature of the […]
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