Voltage to current using op-amp and power transistor
Audio diagram
This circuit changes the voltage to current, can provide dc current characteristics and AC so-so Circuit consists of 3 op-amps, 2 transistors is moderate. Passive devices and only a little. This circuit with grounded. load, it controls the rate Vout / Vin easily, it also has a wide area ranging from about 1 uA output rate of resistance to the flow of the output transistor. It has a high output impedance 50 Meg Ohm is a high accuracy, stability and low noise. The IC op amp (IC1) acts to change the input voltage. The IC op amp to the second …
Single transistor phase shifter
RF - Oscillator
      This is a basic NPN transistor circuit which it provides a simple mean of obtaining phase shifts between zero and 170 degree.       The BC108 transistor works as a phase splitter, the output at point A being 180 degree without phase from the input.       Then Point B is in phase with the input phase. Adjusting R1 gives the sum of different proportions of these and from now a successively variable phase shift.       The circuit operates perfect in the 600Hz to 4kHz range. Related Links Signal converter circuit Simple phase shifter circuit Oscillator lowers distortion and phase noise A frequency multiplier in …
Single Polarity Supply circuit using  IC -LM741
Basic Circuits
This is a simple Single polarity (negative to positive polarity) power supply circuit,For education, the work of a series op amplifiers.Since we use the input pin is a pin non inverting, it is an important condition. We try to come to see this circuit use op-amp IC LM741, be usable easily and, It can change R1,R2 for fix the expansion ratio has of the circuit with. See the detail in the circuit adds. the input power must be negative only As a result, the output voltage. However, if the input is positive, it will not delete the output. Because we …
Vibration Sensor Circuit Kit
Basic - Tools & Tips
Simple vibration and motion sensors can be made using a pendulum switch, mercury switch or one of many other methods. The Vibration Sensor Kit uses no moving parts to detect vibration. Instead, a piezo speaker element is used as a sensitive vibration sensor. Note: I admire the writings of “Forrest M. Mims III”. The content is easy to read, even if English is difficult, for people to learn a second language, I like a science project. When the son grew up, I wanted him to read as well. How It Works The piezo speaker is connected to the input of …