Finishing building of the electrical part
| {gallery} My Gallery Title |
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Distribution system |
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Tec installation |
6 TEC installed (432W) |
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The cooling program on node-red |
Some screenshots of the 8°C tests and settings |
I am back full throttle for the final straight of this great adventure. It will be very intense. I received waterblock and a circulator in addition that I installed. I finished assembling all the wood part to be able to fix all the electrical elements correctly. Following this I performed a test with a setpoint at 8°C. I notice that it works pretty well. I am waiting to receive a controller to be able to drive the TECs with a PWM output of the Raspberry. I will also drive the fan in PWM to make it run slower so is less noise. It will probably enslave on the temperature of the hot circuit using a PID.
For those who want to see how my program works on node-red here is the version that is currently in place :
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},
{
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"noerr": 0,
"x": 770,
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"wires": [
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"wires": []
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"wires": []
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"wires": []
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{
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"wires": []
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{
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"type": "inject",
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"name": "Off",
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{
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{
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{
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"func": "msg.background = \"off\";\nmsg.colour = \"off\";\nreturn msg;",
"outputs": 1,
"noerr": 0,
"x": 950,
"y": 980,
"wires": [
[
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},
{
"id": "7606b20e.1900cc",
"type": "rpi-ds18b20",
"z": "756ed309.7d647c",
"topic": "FF4D0B851605",
"array": false,
"name": "",
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"y": 920,
"wires": [
[
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},
{
"id": "7e4fa775.acd498",
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"name": "",
"topic": "FF4D0B851605",
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"payloadType": "date",
"repeat": "25",
"crontab": "",
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"wires": [
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},
{
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"type": "rpi-sensehat out",
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"name": "",
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"wires": []
},
{
"id": "5fe5ecaf.bcba54",
"type": "function",
"z": "756ed309.7d647c",
"name": "Rotate 180 Text Red Background Blue Speed 5",
"func": "msg.color = \"red\";\nmsg.background =\"0\" ;\nmsg.speed = \"1\";\nmsg.payload = \"R0\\n\"+msg.payload;\nreturn msg;",
"outputs": 1,
"noerr": 0,
"x": 767.8203582763672,
"y": 699.8717937469482,
"wires": [
[
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]
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},
{
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"type": "delay",
"z": "756ed309.7d647c",
"name": "",
"pauseType": "delay",
"timeout": "12",
"timeoutUnits": "seconds",
"rate": "1",
"nbRateUnits": "1",
"rateUnits": "second",
"randomFirst": "1",
"randomLast": "5",
"randomUnits": "seconds",
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{
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"z": "756ed309.7d647c",
"name": "Rotate 180 Text Red Background Blue Speed 5",
"func": "msg.background = \"off\";\nmsg.colour = \"off\";\nreturn msg;",
"outputs": 1,
"noerr": 0,
"x": 907.8203544616699,
"y": 758.7606706619263,
"wires": [
[
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},
{
"id": "535e2998.3dd8a8",
"type": "inject",
"z": "756ed309.7d647c",
"name": "",
"topic": " ",
"payload": "iTender",
"payloadType": "str",
"repeat": "120",
"crontab": "",
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"onceDelay": "",
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"wires": [
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},
{
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"type": "comment",
"z": "756ed309.7d647c",
"name": "Launching the program every 25 seconds",
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"x": 280,
"y": 880,
"wires": []
},
{
"id": "2cf48ba3.2ccee4",
"type": "comment",
"z": "756ed309.7d647c",
"name": "Reading the probe",
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"y": 880,
"wires": []
},
{
"id": "a2e3f705.45e9c8",
"type": "comment",
"z": "756ed309.7d647c",
"name": "Setting the display on Sense-Hat",
"info": "",
"x": 830,
"y": 880,
"wires": []
},
{
"id": "9253c3c6.c494e",
"type": "comment",
"z": "756ed309.7d647c",
"name": "View on Sense-Hat",
"info": "",
"x": 1130,
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"wires": []
},
{
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"repeat": "",
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"onceDelay": "",
"x": 2250,
"y": 680,
"wires": [
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},
{
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"to": "1",
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"action": "",
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"wires": [
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{
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},
{
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},
{
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"wires": [
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]
},
{
"id": "1f56d09a.bdef1f",
"type": "ui_group",
"z": "",
"name": "Pilotage PID",
"tab": "ffe7e50c.0687a8",
"order": 3,
"disp": true,
"width": "8"
},
{
"id": "98a60638.d33a68",
"type": "ui_group",
"z": "",
"name": "Temperature",
"tab": "ffe7e50c.0687a8",
"order": 1,
"disp": true,
"width": "8"
},
{
"id": "a2c986a9.a857d8",
"type": "ui_group",
"z": "",
"name": "Cooling",
"tab": "ffe7e50c.0687a8",
"order": 2,
"disp": true,
"width": "4"
},
{
"id": "ffe7e50c.0687a8",
"type": "ui_tab",
"z": "",
"name": "Cooling system",
"icon": "dashboard",
"order": 5
}
]
I started by installing the "distribution" part (the pumps at the top left). Now i’m installing the containers that will contain sodas. will soon be doing a test with the copper coils that will soak in the cold water (as for a beer shooter). I'll talk about it in a future post.
This weekend I will make the furniture in a carpentry workshop. This will allow me to have a much better finished device. With all the components inside the furniture and a bent tube for "distribution".
This project is a big part of my time right now. One thing is sure : if there had not been this contest I would have never been so far in making this device.
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genebren
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