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This circuit illustrates a straightforward 4-digit frequency counter utilizing an ICM7217 and an ICM7207, which generates the 1-second gating window along with the STORE and RESET signals. The display directly indicates frequency in hertz based on the connections. When...
A modulated current is supplied by the integrated rotational speed sensor KMI 15/x. This current signal needs to be converted into a ground-referenced voltage signal. The KMI 15/x sensor operates by generating a modulated current proportional to the rotational speed of...
The circuit consists of the following components: (1) An infrared emitter which utilizes a multi-harmonic oscillator based on a 555 timer circuit. The oscillation frequency is determined by the values of RP1, R1, and C1, resulting in a frequency...
The circuit is a battery charging system powered by Q2, Q6, R8, and D10, which provides constant current to charge the battery. When an external power supply is present, the charging current flows through R8 and D10 to charge...
The Ultra Fast Battery Charger for Nickel-Cadmium (NiCad) battery cells is designed to efficiently charge NiCad batteries. This charger, referred to as the Ultra Fast NiCad Battery Charger, is capable of rapidly filling NiCad battery cells. The charger is...
A Darlington connection-type transistor is utilized for driving the coil. In this configuration, two stages of transistors are connected in series, resulting in a high current gain, where the "hfe" of the Darlington transistor is the product of the...
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