分立元件觸摸開關(guān)電路分立元件觸摸開關(guān)電路如下圖所示,該電路由感應(yīng)放大器、存儲(chǔ)器、交流驅(qū)動(dòng)器等組成。手指觸摸絕緣金屬板,一個(gè)小的交流信號(hào)加到Tr1的柵極,經(jīng)放大在R4上產(chǎn)生方波,又經(jīng)Tr3(相當(dāng)于二極管)對(duì)C3充
目前市場對(duì)Φ4mm以下,厚度1.5mm以下的麥克風(fēng)產(chǎn)品需求逐漸增加。在器件小型化需求的同時(shí),對(duì)靈敏度和信噪比的要求卻有所提高。這對(duì)于麥克風(fēng)的設(shè)計(jì)和生產(chǎn)帶來了較大的影響,需要對(duì)ECM的各方面進(jìn)行優(yōu)化設(shè)計(jì)才能實(shí)現(xiàn)。
現(xiàn)在對(duì)講機(jī)大多有CTCSS、DTCSS等私密功能,一般來講,當(dāng)對(duì)講機(jī)設(shè)置這些私密功能后,不了解所用私線碼是無法聽到通話內(nèi)容的,但這并非是真正意義上的語音保密。因?yàn)樗谋C芄δ芊浅S邢蓿粚?duì)無意竊聽者有用,而對(duì)有
汽車熱限制器的烙鐵 Auto Heat Limiter for Soldering IronWattage of load10W18W25W35W65W80WValue of R5 (in ohms)330180136 (68+68)1005644 (22+22)Wattage of R5 (in watts)01020204056.5 Usually a solderin
6通道自動(dòng)逆向行駛燈順序迪斯科 6 Channel Auto Reverse Sequential Disco Running LightsFrom 230 V AC a DC supply of + 5 V is obtained. The power supply is given to the other blocks. The pulse generator
簡單的直流電機(jī)PWM調(diào)速電路 Simple DC motor PWM speed controlThe 555 is ubiquitous and can be used as simple PWM speed controlCircuit Explaination: The 555 Ic is wired as an astable and the frequency i
簡單的LED電源項(xiàng)目電路 A power source for simple LED projectsLED's are great display tools. Their prices have decreased to a point where they are replacing more conventional light sources. In one sense
三頻閃儀電路 Triple Stroboscope This circuit enables observation of movement between other stroboscopes. Generation of rectangular signal is based on NE555. This circuit requires a low power supply th
蜂窩式移動(dòng)電話及智能型手機(jī)已成為我們?nèi)粘I畹囊徊糠?。這些手機(jī)推出不久即大受歡迎,速度之快著實(shí)令人驚異。自從數(shù)字傳輸技術(shù)面世以來,移動(dòng)電話不斷推陳出新,功能也不斷多樣化,其變化之大并非今日所能想象。 移
圖1是一個(gè)典型的OTL電路,電路中的C1稱為自舉電容。它在電路中作用如何?為分析方便將圖1簡畫成圖2。 圖2的電路中是沒有C1的情況,在功放中各級(jí)的放大管總是考慮充分利用的,即在輸入信號(hào)U1的作用下,放大管