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4-channel SQ logic decoder – Circuit Schematic
4-channel SQ logic decoder
4-channel SQ logic decoder. Current drain is 75 mA at 20 volts. Input impedance is 2M, while output impedance is 2K (courtesy GTE Sylvania Incorporated)....
4 channel SQ logic decoder – Circuit Schematic
4 channel SQ logic decoder
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SIMPLE EVENT COUNTER – Circuit Schematic
SIMPLE EVENT COUNTER
S1 is a power switch. U2 drives counter U3 by producing a pulse when S2 is depressed. U4 and DISP1 read the count of counter IC U3. S3 is a reset to zero switch...
Interfacing to 7-Segment Displays – Circuit Schematic
Interfacing to 7-Segment Displays
In industrial PLC applications, one of the old, but simpler methods of displaying numeric information is to use one or more 7-Segment numeric displays connected...
Homemade PC Boards – Circuit Schematic
Homemade PC Boards
Control the two digits representing minutes; this circuit includes two shift registers, 30 resistors, and 30 LEDs. (All told, a particularly simplecircuit, real...
Logic Diagrams Services – Circuit Schematic
Logic Diagrams Services
The use of logic symbology results in a diagram that allows the user to determine the operation of a given component or system as the various input signals chan...
Logic Probe Plans – Circuit Schematic
Logic Probe Plans
This is a set of plans for an inexpensive, high performance digital logic probe that you can build in a few hours. It is small enough to use a plastic ball-poin...
cascading shift registers to drive 7-segment displays with PC input – Circuit Schematic
cascading shift registers to drive 7-segment displays with PC input
Four 595s together to drive 7-segment displays and alsoadded code to acceptinput from the PC. Instead of using 10-LED bar graphs like I did last time, I`ve move...
SYNTHESIZER BASICS – Circuit Schematic
SYNTHESIZER BASICS
It is a programable frequency multiplier, usually using digital logic integrated circuits. The synthesizer is aranged to multiply a reference frequency by a pro...
Opto-Coupled RS Flip-Flop – Circuit Schematic
Opto-Coupled RS Flip-Flop
RS flip-flop, or reset-set flip flop, is a kind of stable multivibrator with two input, namely reset and set. The output will be at one of two stable states,.....
Multiplexed BCD Decoder 7 Segments Driver – Circuit Schematic
Multiplexed BCD Decoder 7 Segments Driver
To save the complexity of driver circuit, a multiplexer icrcuit can be used for the solution. With this multiplexed BCD decoder, we can use only one BCD.....
Radio Buttons Using Push On Switch Latching Circuit – Circuit Schematic
Radio Buttons Using Push On Switch Latching Circuit
This is a switching circuit that provide latching mechanism to make a set of radio buttons using push buttons. This circuit consist of interlocking circuit.....
Coincidence Detector for Logic Signals – Circuit Schematic
Coincidence Detector for Logic Signals
This is a coincidence detector circuit. This circuit is very useful for monitoring complex logic circuits. This circuit has two inputs, A and B. if A and B are....
Darlington Transistor Pair Logic Probe – Circuit Schematic
Darlington Transistor Pair Logic Probe
Ideally, any testing equipment will not draw any current from the device under test. This ideal condition can be approximated by  designing a testing device.....
Digital 7 Segment Pulse Counter – Circuit Schematic
Digital 7 Segment Pulse Counter
A pulse counter can be built by using 7490 decode counter and 7557A. This circuit can count from zero to 9. Pins 3 and 2 of all 7490`s must be connected.....
Astable and Monostable Multivibrators – Circuit Schematic
Astable and Monostable Multivibrators
Multivibrators is two state devices which is used extensively in digital electronics. The bistable multivibrators or called filp-flop are the basic memory.....
Discrete Schmitt Trigger – Circuit Schematic
Discrete Schmitt Trigger
This is a schmitt trigger circuit. This circuit produces a simple comparator action. It is `emitter coupled`. This circuit has a distinct hysteresis loop and.....
Discrete Schmitt Trigger – Circuit Schematic
Discrete Schmitt Trigger
This is a schmitt trigger circuit. This circuit produces a simple comparator action. It is `emitter coupled`. This circuit has a distinct hysteresis loop and.....
Split Phase-Data Synchronizer and Decoder – Circuit Schematic
Split Phase-Data Synchronizer and Decoder
Waveform A is timing diagram that shows A split-phase data signal. It consist of a series of binary digits that occur at a periodic rate. Duration of each bit.....
Split Phase-Data Synchronizer and Decoder – Circuit Schematic
Split Phase-Data Synchronizer and Decoder
Waveform A is timing diagram that shows A split-phase data signal. It consist of a series of binary digits that occur at a periodic rate. Duration of each bit.....