Free electronic circuit design and schematic diagram
Simplicity, low cost and improved efficiency when compared with the alternative options are the reasons why the switchstart circuit has been widely adopted. Moreover, the 230V mains voltage is sufficiently higher than tube running voltage to let the use of the simple series impedance ballast in almost every case. Where the mains voltage is not high enough, for example in […]
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For the best advantage as a low noise high input impedance device, the preamp and tone control uses JFET. If the circuit reaches harmonic distortion levels of less than 0.05% with a S/N ratio of over 85 dB, all device parameters are non-critical. 18 dB of cut and boost is allowed by the tone controls. At maximum level, the amplifier […]
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On the circuit diagram, R1 is used to senses current flow of a power supply. We could use JFET as a buffer because Id=Is, therefore the power supply current flow is accurately reflected by the output monitor. Here’s the circuit diagram: [Source: National Semiconductor Application Note]
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To reach low channel ON resistance (<30 Ohm) and low OFF current leakage, 4-channel commutator uses the 2N4091. The DM7800 voltage translator is a monolithic device. This device give us +10V to -20V gate drive to the JFETs while at the same time giving DTL-TTL logic compatibility. Here’s the circuit diagram: [Source: National Semiconductor Application Note]
Read moreThis is a video tutorial about breadboard. This video shows how to make a simple circuit on the breadboard. In this video, the circuit that is build on the breadboard is a simple LED light circuit. It require a LED light, a resistor and two cable. Here is the video : The breadboard consist of small holes and some connector […]
Read moreThis is a video tutorial about RJ45. This video shows how to punch down an RJ45 keystone jack using a impact tool. The first thing that we gonna do is strip the wire. It is very important because when we connect the wire, it can cause the problem. And then, put the wire on RJ45, after that punch it down […]
Read moreThis is a video tutorial about multimeter. This video shows how to use a multimeter. The multimeter can be used to measure voltage, current, resistance, etc. The multimeter that is used in this video is a digital multimeter. First thing that must be done before use the multimeter is calibrate the multimeter by connecting each probe. Here is the video […]
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