A Meter Clock for Eugene
#clock
#time measurement
#display
#precision
#circuit design
#electronics
#DIY
#Eugene
#instrumentation
#timekeeping
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Token number display
Introduction: Token Display Systems are ideal for banks, airports, public dealing offices, hospitals, doctors' clinics, restaurants, and other locations where people must wait in line. These systems allow customers to wait comfortably without standing in line; they only need to...
Game-scoring Display ScreenCircuit
The game-scoring display screen circuit diagram is depicted in the image above. The circuit consists of an add/subtract scoring input circuit, an add/subtract scoring circuit, a counting-decoding display circuit, and a reset circuit.
The game-scoring display circuit is designed to facilitate...
Precision-full-wave-rectifier
This circuit provides accurate full-wave rectification. The output impedance is low for both input polarities, and the errors are small at all signal levels. It is important to note that the output will not sink heavy currents, except for a...
Precision-threshold-detector
This circuit requires low noise, stable offset voltages, high open-loop gain, and high speed. These requirements are fulfilled by the HA5147. Standard variations of this circuit can be easily implemented using the HA-5147. For instance, hysteresis can be introduced by...
Clocks
Clocks have been discussed previously in relation to their interaction with flip-flops (FFs). It is important to note that a clock generates a timing signal used to control operations. This control mechanism is evident in both D and J-K flip-flops....
One second Audible Clock Circuit Schematic
This precise one-pulse-per-second clock is constructed using a few common components and is powered by a 50 or 60 Hertz mains supply without any direct connection to it. A beep or metronome-like click, along with a visible flash, indicates the...
Clock Circuit Design
The high voltage supply will function, but for safety and to prevent accidental damage during troubleshooting with an oscilloscope, it is highly recommended to use an isolation transformer on the 120VAC input. A small 1:1 transformer rated at 30VA is...
Clock circuit using SX 28 internal oscillator
The SX 28 internal oscillator is not that fast, so an external oscillator can be hooked up to the processor as shown in the diagram to increase the operation cycles per second.
The SX 28 microcontroller is designed with an internal...
5x7 DISPLAY
You must be able to recognise components such as capacitors, diodes, zeners, transistors and resistors to build a 5x7 Display project. This information is covered in our BASIC ELECTRONICS course and a complete set of circuit symbols can be found...