My wife recently bought a Colloidal Silver Generator from Health House here in NZ. It is simple to use but requires some attention. We make 1 litre a time in a “quart” preserving jar. Basically our brew needs a get-going period followed by several electrode reversals. The electrodes are wiped clean with a paper towel between cycles. What a great opportunity for me to semi-automate this process! I chose an ESP8266 product and used a Wemos D1 Mini 4MB from Banggood. It grabs its power from the generator supply using a buck converter to give 5V supply. A dual relay board to switch the polarity of the electrodes. There is also a Buzzer Module an LED indicator and a push button. During operation status information is given.
- short beep at 1 minute intervals – waiting for fizz
- led flashes at 1 second intervals shows cycle number
- short beep and led flash at 1 second intervals – clean electrodes then press button
- led flash continuous 1 second ON and 1 second OFF when complete
Bill Of Materials
- Wemos D1 Mini
- Buck converter
- Dual relay board
- Buzzer module
- LED indicator
- SPST momentary push on switch
- 2 pair 4mm banana plug
- 2 pair 4mm banana socket
- Plastic project box
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I would appreciate your support in this way!
I have been playing recently with an Emic–2 Text-to-Speech module. You can buy these from your favourite web store. My USB serial board was probably from AliExpress. Get one with the 3.3V/5V level selection switch for more versatility with different products you may wish to connect to. I use Windows 10 so I downloaded Termite, a simple free RS232 communications tool that enables me to send commands to the text-to-speech module via the USB UART board. Communication parameters are 9600,n,8,1. You need to power the Emic-2 module from a 5 Volt supply capable of half an Ampere because it idles at about 300 mA and peaks to about 500 mA when using a small speaker connected to the on-board amplifier..
The voice output lacks the quality of Siri, Alexa, Cortana or Google Assistant type products, but does a good job of converting text to speech on a self contained module with no computer assistance. Here is an English sample wav file.
I will connect it to my MQTT server via an Arduino Nano or Mini in a future project for making announcements when required from my smart-home project.
This is my test hookup.
I am working on smart home projects for my house using ESP8266, nRF24L01, Raspberry Pi, Arduino, etc.! So far I have a working MQTT server and an ESP-01 attached to my panfan which gives me local weather stats and will start background audio/music/sea-sounds in adjacent rooms to eliminate embarrassment of the current bathroom user. I have a package due tomorrow from Adafruit to help with this. I also want it to let me know my upcoming appointments from Google Calendar.
My second MQTT device is a Wemos D1 Mini Pro board from Banggood that is (almost) controlling and monitoring my double door steel garage located apart from the house. WiFi is poor inside the garage so I will mount the electronics box on the inside of the steel panelling and use an external elbow rod antenna.
My next project will use an nRF24L01 and an Arduino to link a solar powered infrared beam detector across my driveway 100 metres from my house to the MQTT broker. It will be configured to transfer real-time interrupt messages so that vehicles, people or stray animals may be identified. I have this triggered from a IR detector so the beam only activates (using power) when something is near. This saves heaps of 24/7 beam energy (45 mA).