KRIDA Electronics

2,575 orders since Aug 15, 2014

Riga, Riga, Latvia

Ships from Latvia.

Custom Work Available

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For any question you can contact me directly via WhatsApp: +37126784872

Overall Rating:

Review Breakdown

Average Ratings

Product: (4.80)

Documentation: (3.77)

Shipping: (4.55)

Communication: (4.36)

All Reviews

Geoff | March 31, 2024

Good product; well made, works perfectly.

For 8 Channel I2C Electromagnetic Relay Module

I'm using this board to control power amplifiers from an ESP32. Easy to drive using Arduino code.

Is it possible to determine the state of the relays using a micro controller? The documentation doesn't address this.

Marcel | Sept. 13, 2023

Very cool, only 4 wires nice!

For 16 Channel I2C Electromagnetic Relay Module IoT

Got some of those boards. I use them with Raspberry Pi4 and Python.
Here is a easy code to switch the relays with 16 Buttons with TKInter GUI:

import tkinter as tk
from smbus2 import SMBus

I2C_ADDRESS = 0x22 # Adjust the address as needed
bus = SMBus(1)

# Set the configuration word to configure all pins as outputs
bus.write_word_data(I2C_ADDRESS, 0x00FF, 0x00FF)

# Initialize relay states (all off, since all bits are HIGH)
relay_states_1to8 = 0x00FF # Byte for relays 1-8
relay_states_9to16 = 0x00FF # Byte for relays 9-16

def toggle_relay(relay_num):
global relay_states_1to8, relay_states_9to16
if relay_num < 8:
relay_states_1to8 ^= (1 << relay_num)
else:
relay_states_9to16 ^= (1 << (relay_num - 8))

# Write to the output registers for all relays
bus.write_word_data(I2C_ADDRESS, relay_states_1to8, relay_states_9to16)

app = tk.Tk()
app.title("Relay Control")

buttons = []
for i in range(16):
button = tk.Button(app, text=f"Relay {i+1}", command=lambda i=i: toggle_relay(i))
button.pack()
buttons.append(button)

app.mainloop()

Kestutis | Nov. 21, 2022

Nice board

For WIFI 8 Channel Electromagnetic Relay Module

Board itself looks well made and works as expected.
Converting to Tasmota took more time than expected, so leaving some tips for others
Somehow Wemos didn't get into flashing mode automatically, so I used serial flasher and had to ground D3 while connecting power, to get into flash mode.
Tasmota does not PCF8574A out of the box, so need to compile your own binary - https://tasmota.github.io/docs/PCF8574/ Issue is that default driver does not support I2C address of 0x27, so need to change xdrv_28_pcf8574.ino for yourself. There are multiple ways this can be achieved, I changed '7' to '8' in line 114 to include 0x27 into scan - https://github.com/arendst/Tasmota/blob/development/tasmota/tasmota_xdrv_driver/xdrv_28_pcf8574.ino#L114
Once you get custom firmware onto the device, use Generic module type, set D1- SCL, D2 - SDA and after a restart, you should get the "Configure PCF8574" page mentioned in the documentation. Had to check the "Invert Ports" checkbox for 'normal' operation.

Ricardo | Oct. 24, 2022

Good product

For PWM 16A 3500W Triac Leading EDGE Dimmer 50HZ 60HZ

Power excedent manager FreeDS, work fine!!!
Excelenttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt.

Per | July 2, 2022

Excellent price and very well designed

For 8 Channel I2C Solid State Relay Module V2.0

The solid state relays are model Omron G3MB-202P and the board looks very well designed. There are very good clearance distances everywhere where it should be, and there is an elliptical hole under the row of relays (good, also no big risk for being mechanically weakened by this). The ground is not mixed with the high voltage side (which is good). There are no traces under the relays (good). I recommend this product. I gave the documentation 4 stars since there is room for improvement about the information of this board.

António | May 3, 2022

One Triac unit not working

For PWM 16A 3500W Triac Leading EDGE Dimmer 50HZ 60HZ

I received the two triacs, one is working properly. The other one is not working. The Triac do not put power on the load. All leds lights properly and in the upper shield is mounted one ESP 32 with led Display is also working fine, but no power at the output.
Please inform how to solve the problem.

Jose Manuel | April 10, 2022

Funciona muy bien con FreeDs como gestor excedentes.

For PWM 16A 3500W Triac Leading EDGE Dimmer 50HZ 60HZ

Si, ha subido de precio, pero sigue siendo bueno.
Funciona bien con FreeDs (ESP32)como gestor de excedentes en fotovoltaica (autoconsumo), para usarlos en calentar agua caliente sanitaria.
Eso si, hay que buscar información, pues no trae instrucción alguna. Aunque tampoco la placa ESP32, necesaria para el control y que hay que comprarla aparte, trae instrucciones, que se tienen que conseguir de búsquedas en internet de FreeDs, IQAS, etc.
Bueno, al final no es difícil de montar y el control es bueno.

Response from KRIDA Electronics | April 16, 2022

Hi Jose! Thanks for your feedback. Price increase is a necessary measure. The price of semiconductors has doubled in the last 6 months. And the price of the microcontroller has increased 3 times.

Damien | March 22, 2022

Great Product

For PWM 8A AC Light Dimmer Module 50Hz 60Hz TASMOTA

Great Product, perfect for dimming. Has worked in my application for several years now and still running perfectly.

Tim | June 29, 2021

Great product with some obvious ommissions

For I2C MOSFET Trailing Edge AC Dimmer Light

This is great. As a dimmer it works flawlessly as far as I can tell. PCB is high quality. Programming it is easy, though you do have to be aware that above a certain duty cycle (like 97%) you have to just clamp it to 100% otherwise the next zero-crossing interrupt can come before the duty timer which causes flickering.

Probably possible to avoid that properly but it isn't worth the effort.

So the ommissions:

1. This has a full microcontroller on it so it seems weird to only use it as an I2C slave. Break out more pins! I am not using it as an I2C slave - I just used one of the two pins that are broken out to connect to a PIR sensor. I also had to remove the pullup but that's fine.

2. The microcontroller is not powered by the mains input, despite the board having a 12V PSU on it. So this means you need to supply another separate 5V PSU. It would be nice if the board just had a 12V-to-5V regulator on it.

Yes that would mean it isn't fully isolated, but in most cases this is surely just going in a sealed box somewhere so it doesn't matter.

Alternatively it could be optional - just provide 5V output pads on one side and 5V input on the other and I will connect them with a wire.

Overall, great product and there's no competition that I could find so buy this one. But with a few tiny changes it could be way better.

Oh also the designer wouldn't send me a schematic for some reason (not sure why, it's easy but time consuming to figure out), but they did at least reply which is nice.

Nicolas | June 13, 2021

Outstanding

For PWM 16A 3500W Triac Leading EDGE Dimmer 50HZ 60HZ

There are very few high power, properly designed, no-corners-cut, dimmers in the market. This is one of them. 50/60 Hz, 1-wire sensor onboard Triac fan control, onboard AC-> DC converter. The board layout is so clear, you don't need documentation. The device works exactly as advertised. I'm using it to control a 1250W heater on a food warmer to provide precise temperature control. Even with 100 mS minimum PWM direct to the heater, the heater is too powerful and leads to overshoot. This Krida leading-edge dimmer takes a PWM input, but allows an infinitely variable power level from 0-100, in Watts, to the heater. NOW we're talking precise temperature control. I'm buying more.

Nathan | June 1, 2021

Excellent dimmer pack!

For PWM 8A AC Light Dimmer Module 50Hz 60Hz TASMOTA

I use this dimmer pack to control radiant heaters in reptile enclosures. The dimmers are hooked into a raspberry pi which is running the control software. These work very well and are reliable (which is important for temp control for animals). I have bought them twice, and will likely be buying more. I wouldn't hesitate to use this module in other projects. Thanks for selling a great product!

Manuel | April 26, 2021

works perfectly!

For PWM 8A AC Light Dimmer Module 50Hz 60Hz TASMOTA

I've ordered one for testing. works perfectly.
I'll order more modules for my home automation system.

Malcolm | April 23, 2021

Good choice

For 16 Channel I2C Electromagnetic Relay Module IoT

My S/W colleague got this working no problem Delivery fine. Relay count and voltage/ current rating unmatched from what I could fine and perfect for my application. Price great, so recommended.

André | Dec. 1, 2020

Good quality product. Would be nice if it had documentation.

For PWM 16A 3500W Triac Leading EDGE Dimmer 50HZ 60HZ

Good quality product. Would like to see some sort of documentation, schematics with it. Other than that, liked it so much just ordered a second one.

Federico | July 19, 2020

Perfecto

For PWM 16A 3500W Triac Leading EDGE Dimmer 50HZ 60HZ

Un gran producto y muy buen acabado, le falta más explicación de su funcionamiento y uso pero en definitiva es un producto profesional, gracias por todo

Mark | Jan. 9, 2020

High quality board but flickers...need assistance.

For I2C 4CH AC LED Dimmer Module

So, the board appears to work however we wrote a small C++ program to ramp the lights up and down in increments of 1 at 60Hz (same and our power source in the US), thus taking a bit over 3 seconds per period. When driven that way the incandescent connected to it light flickers very noticeably. Since we were matching the power wave I expected it to be very smooth in terms of dimming. What are we doing wrong?

Bob | Nov. 11, 2019

A good product

For 16 Channel I2C Solid State Relay Module

Nicely built, very neat, worked first time. I can recommend this product to any Arduino users.
It would be good to have a SPDT version.

Filip | May 13, 2019

The solid state relay board works good

For 16 Channel I2C Solid State Relay Module

DIY turn off/on lights in the house
Good and fast feedback from the seller.
Maybe a link to documentation would be nice.
But it could be me, as this is the first time I'm using Tindie to buy something.

Keep up the good work.

Fernando | Dec. 23, 2018

Todo genial

For PWM 16A 3500W Triac Leading EDGE Dimmer 50HZ 60HZ

Funcionamiento correcto, bien construido. Un pelin caro teniendo en cue ta que antes estaba mejor de precio en otras plataformas de. Venta.

Paolo | May 15, 2018

Very good

For I2C 4CH AC LED Dimmer Module

The board works as described from manufacturer. One point only, some noise is produced by the light bulb when thr brightens is low. I will check with other light bulb manufacturers.

Scott | Aug. 20, 2017

Works as described!

For PWM 8A AC Light Dimmer Module 50Hz 60Hz TASMOTA

No documentation on the product, but not hard to figure out. Attach it to the Vcc and GND, then just connect a PWM to control it. I am using it with a Raspberry Pi and it works flawlessly! Very satisfied with the product and would recommend to others/buy again if i need another.

Alireza | Dec. 6, 2016

Works well

For 3BIT AC Dimmer for Arduino, Raspberry or MCU, 50HZ

I'm using this product for a home automation project. It works nice, a few times I had flickering issues. But in general it works fine for my little project.

Asbjorn | Sept. 5, 2014

Good product

For 2 CH Temperature Data Logger Celsius / Fahrenheit

The product itself is nice and works very well.

But I forgot to check that it was opensource or not, seeing the product as this, I thought it was open, but no access to sources, and it isn't made for easy updating (unless it have an bootloader for arduino type code)