Ammeter optical pulse and second pulse single-lamp dual-control circuit

Abstract

Disclosed is an ammeter optical pulse and second pulse single-lamp dual-control circuit. The single-lamp dual-control circuit comprises a light emitting module; the single-lamp dual-control circuit ischaracterized by also comprising a first switch module, a second switch module and a signal switching module; the first control ends of the first switch module and the second switch module are electrically connected with the an optical pulse signal and a second pulse signal of a main control module respectively; the second control ends of the first switch module and the second switch module are electrically connected with the first output end and the second output end of the signal switching module respectively; the input end of the signal switching module is electrically connected with a switching signal of the main control module; and the first switch module and the second switch module are both connected with the light emitting module in series. By virtue of ammeter optical pulse and second pulse single-lamp dual-control circuit, the circuit is simplified, the design cost is lowered, and the PCB occupied space is diminished.

Description

technical field [0001] The invention relates to the technical field of electric meters, in particular to a single-lamp dual-control circuit for electric meter light pulses and second pulses. Background technique [0002] Existing electric meters are generally equipped with optical pulse signal AP_CF2' and second pulse signal. These two pulse signals are realized by building two such as figure 1 The circuit shown is realized by using an NPN transistor V1' as a switch tube, and the light pulse signal AP_CF2' or second pulse signal sent by the main control module is used as the base level of the transistor V1' to control the transistor V1 'On and off, so that the light-emitting diode HL1'flickers with the frequency of the pulse signal and outputs a light signal. [0003] Although the existing circuit can output the optical signal under the control of the optical pulse signal AP_CF2' and the second pulse signal, the second pulse signal is only used for external calibration in g...

AI Technical Summary

Problems solved by technology

[0003] Although the existing circuit can output the optical signal under the control of the optical pulse signal AP_CF2' and the second pulse signal, the second pulse signal is only used for external calibration in general, and is idle in most cases, so Designing two identical circuits will appear redundant, which not only increases the design cost, but also increases the space occupied by the PCB board, especially when using plug-in LEDs

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