xia232022-01-28 20:36:56

 

Put an LED voltage tester from a breadboard to a printed circuit prototype board and then into a car cigarette lighter enclosure. Voltage can be measured from 6 to 16 V in a 2 V increament. Red LEDs are for 6, 8 and 10 V. Green LEDs are for 12, 14 and 16 V. 

Voltage inputs from a voltage source at 8, 12 and 16 V are shown in pictures 2, 3 and 4.

Picture 5 is the tester in a car cigaretter when the car key is utility mode (krey is one stop (or push the start button once, radio is on and engine is off).

Picture 4 is when the car engine is running. 

A car battery voltage should be 12.6 V when the car is not running.

A car alternator should be 14.4 V when the engine is running.

原上草20172022-01-29 06:00:49
里面那个IC是干什么用的?
Oneshotkill2022-01-29 06:24:21
免邮费$2.27一个
事后诸葛2022-01-29 08:29:17
好人做到底,不要留一手!
xia232022-01-29 12:12:44
It is a microcontroller.
酒中仙2022-01-29 14:18:51
aliexpress.com 阿里快递,面向世界,东西便宜。
jwhzzj2022-01-29 17:00:29
弱弱地问一句,和6美元一个的万用表相比,强在哪里?
原上草20172022-01-29 17:11:51
有免运费两块多的。
原上草20172022-01-29 17:31:37
到阿里快递,比较麻烦,第一要用信用卡,第二是有问题难以追究。
Oneshotkill2022-01-29 18:39:40
游荡阿里速通至少七八年,买过的东西几十美分到百十来刀的都有,虽然极个别耗时长达60-70天,但是从未丢失过一件!
酒中仙2022-01-29 18:41:29
1.用美国的PayPal支付,对方得不到你的信用卡信息,安全。2,我买过一些东西,遇到过买错的东西
酒中仙2022-01-29 18:46:55
我也没有丢失过东西,只收到过一件被压断的货,他们又寄了件新的,就是再耗时一个月。
原上草20172022-01-29 19:00:08
就是不喜欢用信用卡,担心信息安全,在美国的知名公司就没这种疑虑,用Paypal安全,可惜阿里不接受。
原上草20172022-01-29 19:01:33
找代购买,然后用DHL, UPS, Fedex 寄,通常一个星期就到,不过运费比较贵。
MoonRiverMe2022-01-29 19:32:15
省了你用probes来量而已
iGarage2022-01-29 21:42:04
还带两个USB充电口.....
原上草20172022-01-29 21:58:17
你这个要付 $3 运费, 加起来就 $5.44了。不如买那些从美国卖的,这个从加州寄出的,才 $4.95,几天就到了。
TBz2022-01-29 22:33:33
信用卡是很安全的网购付账方式。
xia232022-01-29 23:48:32
I bought many things from Aliexpress.com. They do accept Paypal.
原上草20172022-01-30 00:31:53
对!Aliexpress.com 可以用 paypal ,我把淘宝和Aliexpress.com 搞混了。
chun872022-01-30 17:51:58
这样简单的多
chinomango2022-01-31 04:20:37
ebay上点烟器接口的电压表、USB、温度计啥的种类很多
chinomango2022-01-31 05:02:00
我的丢过,或者卖家没发货也没退款,比ebay危险多了