Electronic counter circuit
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12V 5MHz COUNTER
The portable counter is designed with low-power logic to minimize battery drain while maintaining good performance. Since most of the milliwatt power drain is consumed by the digital readout, the circuit blanks the LED display when there is no input...
digital counter circuits
The circuit in Figure 1 is a 4-bit asynchronous counter, also known as a ripple counter. It consists of four J-K flip-flops with their J and K inputs connected to logic 1. This configuration causes the output of each J-K...
DIVIDE BY ODD NUMBER COUNTER
This circuit symmetrically divides an input by virtually any odd number. The circuit contains n+l/2 clocks twice to achieve the desired divisor. By selecting the proper n, which is the decoded output of the 74LS161 counter, divisors from 3 to...
Logic adjustable Glow-Plug drive
All of my turbine starts before the research on the ECU involved a very successful spark ignition. I thought (only briefly) of trying to add spark ignition to the ECU, but the mixture of delicate logic circuitry and perhaps 30,000V...
Digital visitor counter Schematic Diagram
The digital visitor counter is a reliable circuit designed to accurately count the number of persons or visitors in a room. When an individual enters the room, the counter increments by one, and when someone leaves, the counter decrements by...
Divide-circuit
An input signal drives both SN74 D-type flip-flops, which are positive edge-triggered devices. A low-to-high input signal transition triggers the A flip-flop, while a high-to-low input signal transition triggers the B flip-flop via the SN7404 inverter. Either flip-flop in the...
High Precision Digital Pulse Meter Circuit
This compact device, designed primarily for modelers, provides instantaneous readings of pulse duration in milliseconds (ms). It can measure servomotor positions, typically ranging from 1 ms to 2 ms, and can also perform repetitive or non-pulsed measurements, such as the...
Homemade Digital CALL-ID English Version
The reason for this project was to facilitate a quick installation for a local friend 10 km away, enabling the start of real-life testing to identify and resolve bugs and problems before releasing it to other users. The software is...
Flip-Flop Using CMOS NAND Gates
Using just two NAND or inverter gates, it is possible to build a D-type (or toggle) flip-flop with a push-button input. At power-up, the output of gate N2 is at a logical 1, ensuring that transistor T2 is switched off....