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Washer Monitor

openhardware.io last edited by

https://www.openhardware.io/view/60/Washer-Monitor
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mysensors 192 contest2016 19 arduino nano 13 photo-resistor 2 washing machine 1 washer 1

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💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2)
OpenHardware.io • mysensors livolo • • openhardware.io

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Hello all, I studied a little bit more this part of the circuit and it's a standard self oscillating flyback converter or a ringing choke converter as others call it. Indeed it provides the most compact solution for space constrained designs. But all of this comes at a cost: it's difficult to obtain a stable circuit and it has to be tuned by trial and error - at least this is what the literature says. I'm not a switching power supplies expert here(even though I want to learn more about SMPS's in general but my time is limited for now) but I've come to a conclusion: it's difficult to tune this or to change the existing circuit to accommodate the mysensors circuits power requirements. I tried various combinations using sleep schemes and to change the flyback converter components as other mentioned in the mysensors forum and indeed I can power up my custom design that is presented in this thread BUT it's NOT STABLE. From time to time the switching transistor(mje13003) burns out and this is because I removed the resistor placed at the input of this power supply - near the bridge rectifier and replaced it with a wire(this is not the same resistor as @Lukaspp replaced from the base of the transistor which is the startup resistor for the flyback converter). Now the only purpose that I imagine for this resistor is to suppress the transients - but it has a big value(100Kohm) which limits the current to a non-usable value for our purpose. I know that there are other solutions to overcome the transients but they are either bulky or too slow for this(correct me if I'm wrong here). More than that let's not forget that we have 2 power supplies here and when the lights go on the first supply(flyback) input gets shorted by the relays contact(I have the relays variant btw not the one with triac) so I'm thinking that other transients appear here as the primary inductor doesn't like that as far as I know - so I assume the above mentioned resistor of 100Kohm comes into play here too. Another role for it would be to limit the inrush currents. I played with that value too but it needs to be very low to have something stable and I got a value around 200ohms but that doesn't help as it's too low and after some time the resistor burned up and saved my transistor :simple_smile: . Now with all the tricks in the world and tuning the flyback converter to give more current this won't help as again let's not forget we have a SERIES circuit here so without external intervention we can't achieve that(only if we break somehow the laws of physics or maybe my thinking is limited :simple_smile: ). In this case the external capacitor placed across the light bulb comes into play to supply enough current to the standby circuit which is our flyback converter over here. I played with that one too and from 0,47uF I got to 4.7uF to have a decent result - but this one gets bulky and more expensive from obvious reasons. And let's not forget that the light bulb itself has some impact overall because this is the actual LOAD that we want to control and there are various light bulbs over there with various requirements. More than that they have their power supply embedded which in most of the cases is a(you guessed maybe): a self oscillating FLYBACK CONVERTER or similar. So this one too has inrush currents, transients which are sensed down the line to our dear Livolo switch and affects my custom board stability again :simple_smile: - isn't life beautiful? :simple_smile: So far these are the results of my trials and none of them proved to be stable so I kinda gave up on this and will try to use a normal powering scheme somehow(as Sonoff switches with a battery powered touch switch on the wall). Not the best solution of all but this is what you get when the infrastructure wasn't thought for this scenarios from the beginning. The Livolo guys thought of all of this I assume so that's why they stayed only with a simple circuit - a PIC mcu which maybe sleeps most of the time and a simple radio receiver which draws around 5mA or even less - so yeah that's why this works and it's stable in its original form.
💬 MDMSNode "Power"
OpenHardware.io • mysensors arduino nrf24l01 rfm69 relay atsha204a atmega328p hlk-pm01 dc-dc acs711 • • openhardware.io

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Ah.... Ok
💬 Wall Socket Insertable Node
OpenHardware.io • mysensors rfm69 relay atsha204a power supply • • openhardware.io

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@yury said in Wall Socket Insertable Node: Looks cool! Do you have experience with capacities switches? I did not play much with them. afraid to use close to AC interference though... You need to use a capacitive IC with active shielding, basically you have an extra electrode around your touch electrode and the touch IC will compare capacitive change of the touch electrode with capacitive change from the shield electrode. If the change is due to electrical interference then both electrodes will be changed in a similar way and the IC will not trigger.
💬 LCDUINO
OpenHardware.io • serial arduino nano lcd uart • • openhardware.io

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@NeverDie said in LCDUINO: the LCD components don't appear to be named, not even on the schematic Looks like a typical text LCD like 1602 on the picture.
💬 MyThermostat
OpenHardware.io • mysensors arduino rfm69 thermostat pid heater • • openhardware.io

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@kimot I am not handling that situation. I'm taking for granted ssr will do his job. Maybe there's some ssr safety topic I'm unaware? Suggestions for a v3.0 are welcome. About the temperature measuring... I use two sensors. The one in the board protects electronics from temperatures beyond design (60°C). It's near the ssr because the ssr's derating curve is the most limiting condition. The control sensor is placed in the bottom of the heater. It connects to the board through a 3 pin header connector.
💬 Window Sensor with Sensebender (high WAF)
OpenHardware.io • mysensors nrf24l01 door window waf • • openhardware.io

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@antonholmstedt a pro mini fits if you cut the corners, check out https://forum.mysensors.org/topic/6612/door-sensor-remix-of-some-mys-community-efforts
💬 MySensors Watermeter
OpenHardware.io • mysensors arduino mysensor water watermeter • • openhardware.io

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💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1 Ver: B8)
OpenHardware.io • mysensors livolo • • openhardware.io

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@dzungpham0703 I replied in the nrf51822 thread. Yes I managed to make it work like the original with BLE stack. And using the wonderful Cypress Proc BLE solution including capsense and lots of goodies . Cypress really rocks! I love them. The current consumption was lowered to 200uA without being connected and 700uA connected. Those numbers include LEDs current consumption and other blocks like touch sensing. I'll get back with more updates when it's finished.

Washer Monitor

Suggested Topics

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2)
OpenHardware.io • mysensors livolo • • openhardware.io

💬 MDMSNode "Power"
OpenHardware.io • mysensors arduino nrf24l01 rfm69 relay atsha204a atmega328p hlk-pm01 dc-dc acs711 • • openhardware.io

💬 Wall Socket Insertable Node
OpenHardware.io • mysensors rfm69 relay atsha204a power supply • • openhardware.io

💬 LCDUINO
OpenHardware.io • serial arduino nano lcd uart • • openhardware.io

💬 MyThermostat
OpenHardware.io • mysensors arduino rfm69 thermostat pid heater • • openhardware.io

💬 Window Sensor with Sensebender (high WAF)
OpenHardware.io • mysensors nrf24l01 door window waf • • openhardware.io

💬 MySensors Watermeter
OpenHardware.io • mysensors arduino mysensor water watermeter • • openhardware.io

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1 Ver: B8)
OpenHardware.io • mysensors livolo • • openhardware.io

26
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Washer Monitor

Suggested Topics

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2) OpenHardware.io • mysensors livolo • • openhardware.io

💬 MDMSNode "Power" OpenHardware.io • mysensors arduino nrf24l01 rfm69 relay atsha204a atmega328p hlk-pm01 dc-dc acs711 • • openhardware.io

💬 Wall Socket Insertable Node OpenHardware.io • mysensors rfm69 relay atsha204a power supply • • openhardware.io

💬 LCDUINO OpenHardware.io • serial arduino nano lcd uart • • openhardware.io

💬 MyThermostat OpenHardware.io • mysensors arduino rfm69 thermostat pid heater • • openhardware.io

💬 Window Sensor with Sensebender (high WAF) OpenHardware.io • mysensors nrf24l01 door window waf • • openhardware.io

💬 MySensors Watermeter OpenHardware.io • mysensors arduino mysensor water watermeter • • openhardware.io

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1 Ver: B8) OpenHardware.io • mysensors livolo • • openhardware.io

26Online

11.7kUsers

11.2kTopics

113.0kPosts

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2)
OpenHardware.io • mysensors livolo • • openhardware.io

💬 MDMSNode "Power"
OpenHardware.io • mysensors arduino nrf24l01 rfm69 relay atsha204a atmega328p hlk-pm01 dc-dc acs711 • • openhardware.io

💬 Wall Socket Insertable Node
OpenHardware.io • mysensors rfm69 relay atsha204a power supply • • openhardware.io

💬 LCDUINO
OpenHardware.io • serial arduino nano lcd uart • • openhardware.io

💬 MyThermostat
OpenHardware.io • mysensors arduino rfm69 thermostat pid heater • • openhardware.io

💬 Window Sensor with Sensebender (high WAF)
OpenHardware.io • mysensors nrf24l01 door window waf • • openhardware.io

💬 MySensors Watermeter
OpenHardware.io • mysensors arduino mysensor water watermeter • • openhardware.io

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1 Ver: B8)
OpenHardware.io • mysensors livolo • • openhardware.io

26
Online

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