I was just wondering how I would go about setting up the (provided below) single latch relay.
It is a 3v relay and it is single latching.
I have read in places that you can use a H bridge or something to Latch or de latch this type of relay, but it is hard to find a tutorial for this exact part.
I just had a few questions:
Do i need to buy a part to latch and unlatch this relay, or is it possible to create a circuit which will do the same.
Which micro controller would be easier to use for this project. I have WemDos d1 which output 3.3v logic (i think) and I whole bunch of arduinos that output 5v. My thought is to use the Wemdos, as I will not have to convert the logic. although I do have one logic level converter which I dont know how to use.
Would this work as a h bridge to altch and unlach the relay? H bridge??
I have dual latching relays as well, but I thought I would try and learn how the single latch relays work.
I was wondering if you could possibly help me out with an issue:
Using this forum and the help from some people, I created a circuit which works for all my arduinos to latch the dual latching relay in either direction.
However, when I attempt the same circuit (one with NPN transistors, diodes and resistors with my Wemos d1 esp8266 wifi microcontroller, it seems to have no affect.
Does it sound like i need to pulse the transistors longer or change the resistors?
i know that the controller has a maximum output current of 10ma. Is it capable of sswitching a 5v dual latch relay with a transistor and a 3v wifi micro controller.
Yes, with 3 volt supply you really need 120 ohm base resistors to fully saturate the 2n2222 at
200mA load, which is why 330 worked and 470 didn't - ie its still rather borderline.
I managed to get it working with optocouplers. They seem to trigger on 5v with 220 resistors. So i guess ill be saving my transistors.....Turns out i had them around the wrong way, I was following the writing where i should have followed the dot...
I am now having trouble flashing my esp8266.
I have tried with a logic level shift, with an adapter module. Everything except serial to usb module. I cant even get AT commands working...I am sure it is the parts not the maker...except, I have tried it amonst a variety of different esp8266 modules.