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Schmitt trigger with LM741 op-amp – Circuit Schematic
Schmitt trigger with LM741 op-amp
The schmitt trigger circuit is built around a single LM741 op-amp, its output buffered by a transistor, which in turn energizes a relay. The relay may be replac...
Schmitt trigger with LM741 op-amp – Circuit Schematic
Schmitt trigger with LM741 op-amp
The schmitt trigger circuit is built around a single LM741 op-amp, its output buffered by a transistor, which in turn energizes a relay. The relay may be replac...
Biasing Op-Amps into Class A – Circuit Schematic
Biasing Op-Amps into Class A
"Class A" refers to configuring an amplifier so that its output devices remain turned on all the time. This reduces thermal variation and eliminates crossover d...
Connection Tester – Circuit Schematic
Connection Tester
A low resistance ( 0.25 - 4 ohm) continuity tester for checking soldered joints and connections. This simple circuit uses a 741 op-amp in differential mode as ...
Voltage Comparator Circuits – Circuit Schematic
Voltage Comparator Circuits
This page provides basic information about voltage comparator integrated circuits and is to act as reference material for other circuits. The circuits shown are...
Filter Wiz PRO – Circuit Schematic
Filter Wiz PRO
Filter Wiz PRO active filter designer version 4 has just been released. Version 4 represents a major advance in the rapid design of stable and effective active ...
Voltage Controlled Panner – Circuit Schematic
Voltage Controlled Panner
The control voltage is fed into the first half of a 1458 op-amp, this stage inverts the signal and sets the offset and gain for the right channel gain control c...
Voltage Comparator Switch – Circuit Schematic
Voltage Comparator Switch
This circuit will provide an indication whenever the input voltage differs from two defined limits, V1 and V2. The supply voltage, Vcc must be higher than the h...
Voltage Comparator Switch – Circuit Schematic
Voltage Comparator Switch
This circuit will provide an indication whenever the input voltage differs from two defined limits, V1 and V2. The supply voltage, Vcc must be higher than the h...
Opamp Design and Test Board – Circuit Schematic
Opamp Design and Test Board
This project is basically what I use for a quick prototype, or for just mucking about with an idea. It is easy to make, and only needs a medium size sheet of u...
Opamp Design and Test Board – Circuit Schematic
Opamp Design and Test Board
This project is basically what I use for a quick prototype, or for just mucking about with an idea. It is easy to make, and only needs a medium size sheet of u...
16-bit adjustable reference uses 8-bit digital potentiometers – Circuit Schematic
16-bit adjustable reference uses 8-bit digital potentiometers
It may be easy to find a precision voltage reference for your application; however, a programmable precision reference is another matter. The circuit in Figure ...
16-bit adjustable reference uses 8-bit digital potentiometers – Circuit Schematic
16-bit adjustable reference uses 8-bit digital potentiometers
It may be easy to find a precision voltage reference for your application; however, a programmable precision reference is another matter. The circuit in Figure ...
CIRCUIT ALLOWS SLEW RATE CONTROL – Circuit Schematic
CIRCUIT ALLOWS SLEW RATE CONTROL
This circuit (figure 1) will impose a maximum slew rate on a signal; positive and negative rates can be independently controlled. The circuit is useful in servo...
CIRCUIT ALLOWS SLEW RATE CONTROL – Circuit Schematic
CIRCUIT ALLOWS SLEW RATE CONTROL
This circuit (figure 1) will impose a maximum slew rate on a signal; positive and negative rates can be independently controlled. The circuit is useful in servo...
The SC (Schmitt Comparator) Head – Circuit Schematic
The SC (Schmitt Comparator) Head
I`ll eventually post an explanation, but in the meantime, here it is. Meanwhile, a slightly refined version (with flashing LEDs to indicate "lock") was posted ...
The SC (Schmitt Comparator) Head – Circuit Schematic
The SC (Schmitt Comparator) Head
I`ll eventually post an explanation, but in the meantime, here it is. Meanwhile, a slightly refined version (with flashing LEDs to indicate "lock") was posted ...
Closing the loop deepens notches – Circuit Schematic
Closing the loop deepens notches
Notch filters remove a single unwanted frequency from an input signal. They are also a vital component of pulse-shaping networks, such as time-averaging filters...
Hum filter – Circuit Schematic
Hum filter
On this page three adjustable notch filters configurations are shown . They can be used in your small pre-amp or amplifier project to filter out any HUM at 50 H...
Adjustable high-frequency notch filter – Circuit Schematic
Adjustable high-frequency notch filter
Although you can obtain universal, resistor-programmable switched -capacitor filters that are configurable as notch filters, most cannot operate at bandwidths h...