电工基础2026-03-07

数码预置电路 该电路的功能是把键盘按键信号变换成2位BCD码，并存储下来。图4-6-1为该编码及存储电路的逻辑图。

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电工基础2026-03-07

键盘扫描电路 在上例中，键盘规模较小，仅有0-9十个键。如果键盘规模较大，则用优先编码器等组合元件来实现编码将是不经济的。为此人们设计了键盘扫描电路。图4-6-2给出了128键的扫描编码器。

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电工基础2026-03-07

音乐集成电路原理介绍 使用音乐集成电路，通过简单的外接电路即可获得简单的乐曲、语音或是各种模拟的声响。音乐集成电路价格便宜，电路结构简单，工作稳定可靠，耗电省，所以用途广泛；在音乐门铃、音乐贺年卡、音

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电工基础2026-03-07

气敏器件（气敏传感器）介绍及应用 气敏器件（又称气敏传感器）是一种对环境气氛中某些氧化性气体、还原性气体、有机溶剂蒸汽十分敏感的电子器件，被广泛应用于对可燃性气体和有毒性气体的检测、检漏、报警和监控等

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电工基础2026-03-07

多通道火箭发射器 -Multi Rocket Launcher DescriptionThis launch controller can be used with low voltage battery igniters, which fire rocket engines in model rockets such as the Estes range. These cir

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电工基础2026-03-07

电池组接收机的放电电路--Discharger for Receiver Battery Packs You may have read about cycling NiCad batteries.  If not, read a little here ( Red\'s R/C Battery Clinic) for an excellent overview. 

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电工基础2026-03-07

红外线开关电路-Infra Red Switch This is a single channel (on / off) universal switch that may be used with any Infra Red remote control that uses wavelengths between 850-950nm.

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电工基础2026-03-07

红外遥控电路--Infrared Remote Control This circuit will allow you to turn on any piece of equipment that operates on 115 volts ac. The reciever circuit is based on the Radio Shack infrared receiver m

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电工基础2026-03-07

击落模型定位器电路 (Downed Model Locator II) Here is another device to help you locate your downed R/C sailplane in the bushes and weeds.  Similar to the other design, this circuit plugs into a spa

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电工基础2026-03-07

Phorism with 12V R1 = 27 KOhm  1/4W Q1,2 = BC 548 C1,2 = 15 nF polyester R2 = 1,2 ΚOhm  1/4W Q3 = 2N2219

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电工基础2026-03-07

PWM马达/灯控制器电路-PWM Motor/Light Controller A pulse width modulator (PWM) is a device that may be used as an efficient light dimmer or DC motor speed controller. The circuit described here is a g

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电工基础2026-03-07

单极性步进电机控制器电路--Unipolar Stepper Motor Controller This is a very good integrated circuit. There is no need for any external glue logic to drive the circuit, there is only 2 pins to drive th

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电工基础2026-03-07

可调频闪灯电路--Adjustable Strobe Light This one uses a much more powerful \"horse shoe\" Xenon tube which produces more light. You can also control the flash rate up to about 20Hz. Do not look direc

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电工基础2026-03-07

风扇控制器电路-Fan control This is a simple circuit that will do what you want I believe. R1 15k ohm resistorNTC Thermistor- 10k ohm, sold at Radio Shack in the states.P1 10k ohm potentiometer - se

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电工基础2026-03-07

直流电动机控制电路-DC Motor Control Circuit Notes:  Here, S1 and S2 are normally open , push to close, press button switches.  The diodes can be  red or green and are there only to indicate direct

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电工基础2026-03-07

简单伺服测试仪电路--Simple Servo Tester click here to download schematic in pdf This is a simple servo tester which will comprehensively test the capabilities of almost any modern servo. It has two

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