Free electronic circuit design and schematic diagram
Below is video tutorial about basic of level measurement. As we know, we have been measuring level since the days of the Pharaoh, but why is it still so hard? That’s because most process engineer do not think level is control function but process function. Control Editor in Choef Walt Boyes will explain about the basic of measuring level and […]
Read more
The circuits. To produce any output voltage, an external feedback resistors can be added. The sLM2576 is a Switching Regulator that can produce 15, 12, 5, 0r 3.3V output voltage from maximum supply voltage of 60V or 40V. This LM2476 featured with voltage reference, switch and feedback path for use in either the negative boost or the buck saturation voltage […]
Read more
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 […]
Read more
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 more
Below is a schematic diagram of blocking monostable circuit. The normal state of the transistor is off because the 10 k resistor has been removed. The conduction will be started using a positive pulse at node “a” and the transformer will do the rest. The transistor will again be turned off (by a hefty negative pulse to the base) after […]
Read more
Circuit below is circuit of a transistor blocking oscillator. The transformer is phased. This cause any increase in collector current pulls the base up, further increasing the current. The transformer may the the most appropriate but not the most optimum. Any fluctuation in the collector current is fed back and reinforced because the 10k resistor biases the transistor. The base […]
Read more
The UJT below is configured to produce a sawtooth wave at a frequency of 104 Hz. The capacitor begins to charge through the 4.7 kOhm resistor when the circuit is initially powered up. The current suddenly flows from the UJT emitter (E) to the UJT Base (B1) when the voltage across the capacitor rises to a certain point. This will […]
Read more