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Gerrifessy

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  • MLX90614 3V and ESP8266 WiFi Module?

    Hi, there

    Will the MLX90614 3V work with the ESP8266 WiFi Module and micropython? I read the specs on the MLX90614 and I'm not sure if the ESP8266 supports repeatable i2c?

    If the electronics will work I can probably figure out the micropython code, unless its not supported?

    Is there anyone have ideas of it? Thanks.

    Other - Electronics5 days ago

  • Hwo to add up analogue inputs to average them?

    Hi,

    I would like to read a sensor (acs712) a number of times (20), add them all up, then divide them by the number of reads. So I can get an average. to give me a sort of analogue "debounce". Am I guessing the sum function? 

    I sincerely appreciate any advice you can all give me, I'm incredibly excited about learning all of this!

    1 AnswerProgramming & Design3 weeks ago
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    Which type of relay is used as time delay relays?

    "Generally speaking, the delay performance of the time relay can be adjusted within the range of design, so as to facilitate the adjustment of its delay time. In addition, a time relay alone may not be able to do close. After closing for a period of time, it will open again. It is a cycle of time-delay closing and opening. However, configuring a certain number of time relays and intermediate relays can do it."(source: https://www.apogeeweb.net/electron/time-delay-rela... After read it, someting still confused me: is time relay a normal type electrical relay? or Which type of relay is used as time delay relays?

    Engineering6 months ago
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    What is the difference between a relay and a switch?

    I have seen an article said that "Under the actions of pull-in and release, achieve the purpose of conducting and cutting off in the circuit."(source: https://www.apogeeweb.net/electron/how-relays-work... That is, relay used as a switch. There is also example ( relay controlling the light) to describe its function, which make me feel confused. Can a relay be equivalent to a switch? or another words, in electronics, what is the difference between a relay and a switch?

    9 AnswersEngineering7 months ago

  • What's Wrong with an Op Amp Used as a Voltage Comparator?

    I use a voltage comparator to make an amplifier circuit, but something went wrong. Someone showed me an lm393 amplifying circuit, the magnification is 2. It is related with the idea of "When the frequency requirement is not high, the operational amplifier can also be used as a low-performance comparator in practical applications.

    In theory, an operational amplifier with an open-loop configuration (no negative feedback) can function as a low-end comparator."(source from https://www.apogeeweb.net/electron/using-op-amp-as...

    Is there anyone can give me some advice? Many thanks.

    1 AnswerEngineering8 months ago

  • Electronic Problem about Freewheeling Diode?

    ​I have a DC motor with a voltage of 12V and a power of 550W, using a freewheeling diode 1N5822, but now this diode is often burned. Check the information to see that its maximum instantaneous current reaches 80A, thus I think it can work properly in the circuit. Why this happened? What should this margin be? Is it related to reverse recovery time?

    8 AnswersEngineering1 year ago