Temperature Monitoring: Difference between revisions

Latest revision as of 16:01, 31 January 2019

Temperature data from around the space is being logged via Cacti.
Sampling done with DS18S20 1-wire digital thermometers, these can be daisy chained of the other arduino and MQTT devices.
Temperatures are regularly published to "nh/temp" in the format "address:temp" e.g. "10C3282902080021:20.31".

Current temperature sensors:

MatrixMQTT - Blue room, studio and comfy area
Mini-matrix - Snackspace fridge
WorkshopMQTT - Workshop

Possible Arduinos to hook into:

Gatekeeper in members box room (arduino, ethernet)
Vending Machine in workshop (nanode)
Energy Monitor to go in blue room cupboard (XRF)

Cheap and cheerful thermistor workshop

I have a bag of surplus 47k thermistors (about 500) and I intend to build a number of circuits to measure temperature starting with the very simplest and culminating in a teachable HackSpace project with reasonable accuracy. We will put these devices in fridges, near heat sources, near doors, windows, indoors, outdoors, you name it.

The component:

Listed in stores as "Future Electronics B4090K Thermistor 47k 5%"
I think it may be this one
- http://uk.futureelectronics.com/en/Search.aspx?dsNav=Ny:True,Ro:0,Nea:True,N:477-4294920237
- http://uk.futureelectronics.com/en/Technologies/Product.aspx?ProductID=NTCLE100E3473JB0VISHAY8666240
however, the Vishay product may be obsolete and the tolerance is listed as 1.5% rather than 5%

  VISHAY 
   NTCLE100 Series NTC 47 kOhm ±1.5 % Radial Leaded Standard Precision Thermistor
   Mfr Part#:  NTCLE100E3473JB0
   Packaging : BAG 
   Std Packaging Qty: 500
   Min Order Qty: 1
   As low as:  £0.1751  (GBP)
   In Stock:  No
   Type: 
   NTC
   Resistance: 
   47 kO
   Tolerance (%): 
   ±1.5 %
   B-constant: 
   4090 °K
   Temperature Range: 
   -40 to +125 °C

Some Google digging reveals...

http://www.vishay.com/docs/29049/ntcle100.pdf
these thermistors are colour coded
- Yellow Violet Orange Gold
  - B25/85-VALUE = 4090K (+/- 5%) (the gold means 5%)

The simplest circuits and Arduino code...

http://arduino.cc/playground/Main/InterfacingWithHardware#envtture

Michael Erskine 06:43, 14 December 2011 (EST)

Old Notes

Temp sensors dotted around space - done to some degree
Nanode again
Small wireless units or daisy chain of dallas one wires?
Humidity sensor's?
Push to cacti - done - [1]
Query from irc - done; say "!temp" in #nottinghack

@@ Line 1: / Line 1: @@
-Temperature data from around the space is to be log via Cacti.<br/>
+Temperature data from around the space is being logged via [http://cacti.nottinghack.org.uk/graph_view.php Cacti].<br/>
-Sampling done with DS18S20 1-wire digital thermometer, these can be daisy chained of the other arduino and MQTT devices.<br/>
+Sampling done with DS18S20 1-wire digital thermometers, these can be daisy chained of the other arduino and MQTT devices.<br/>
-Aim to publish a standard format MQTT message that a script on [[Holly]] will decode and push to cacti<br/>
+Temperatures are regularly published to "nh/temp" in the format "address:temp" e.g. "10C3282902080021:20.31". <br/>
-Posible Arduino to hook into
+Current temperature sensors:
+* [[LED Matrix|MatrixMQTT]] - Blue room, studio and comfy area
+* [[Mini-matrix]] - Snackspace fridge
+* [[WorkshopMQTT]] - Workshop
+Possible Arduinos to hook into:
 * [[Gatekeeper]] in members box room (arduino, ethernet)
-* [[LED Matrix]] in studio (arduino mega, ethernet)
 * [[Vending Machine]] in workshop (nanode)
-* [[Energy Monitoring|Energy Monitor]] in blue room cupboard (XRF)
+* [[Energy Monitoring|Energy Monitor]] to go in blue room cupboard (XRF)
+=== Cheap and cheerful thermistor workshop ===
+I have a bag of surplus 47k thermistors (about 500) and I intend to build a number of circuits to measure temperature starting with the very simplest and culminating in a teachable HackSpace project with reasonable accuracy. We will put these devices in fridges, near heat sources, near doors, windows, indoors, outdoors, you name it.
+The component:
+* Listed in stores as "Future Electronics B4090K Thermistor 47k 5%"
+* I think it may be this one
+** http://uk.futureelectronics.com/en/Search.aspx?dsNav=Ny:True,Ro:0,Nea:True,N:477-4294920237
+** http://uk.futureelectronics.com/en/Technologies/Product.aspx?ProductID=NTCLE100E3473JB0VISHAY8666240
+* however, the Vishay product may be obsolete and the tolerance is listed as 1.5% rather than 5%
+<code>
+   VISHAY
+    NTCLE100 Series NTC 47 kOhm ±1.5 % Radial Leaded Standard Precision Thermistor
+    Mfr Part#:  NTCLE100E3473JB0
+    Packaging : BAG
+    Std Packaging Qty: 500
+    Min Order Qty: 1
+    As low as:  £0.1751  (GBP)
+    In Stock:  No
+    Type:
+    NTC
+    Resistance:
+kO
+    Tolerance (%):
+    ±1.5 %
+    B-constant:
+°K
+    Temperature Range:
+    -40 to +125 °C
+</code>
+Some Google digging reveals...
+* http://www.vishay.com/docs/29049/ntcle100.pdf
+* these thermistors are colour coded
+** Yellow Violet Orange Gold
+*** B25/85-VALUE = 4090K (+/- 5%) (the gold means 5%)
+The simplest circuits and Arduino code...
+* http://arduino.cc/playground/Main/InterfacingWithHardware#envtture
+** http://arduino.cc/playground/ComponentLib/Thermistor
+** http://arduino.cc/playground/ComponentLib/Thermistor2
+** http://arduino.cc/playground/ComponentLib/Thermistor3
+[[User:Msemtd|Michael Erskine]] 06:43, 14 December 2011 (EST)
 ===Old Notes===
-* Temp sensors dotted around space
+* Temp sensors dotted around space - done to some degree
 * Nanode again
-* Small wireless units or daisy chain of dalas one wires?
+* Small wireless units or daisy chain of dallas one wires?
 * Humidity sensor's?
-* Push to cacti
+* Push to cacti - done - [http://cacti.nottinghack.org.uk/graph_view.php]
-* Query from irc
+* Query from irc - done; say "!temp" in #nottinghack
 [[Category:Projects]]
+[[Category:Projects (in progress)]]
 [[Category:Instrumentation]]

Temperature Monitoring: Difference between revisions

Latest revision as of 16:01, 31 January 2019

Cheap and cheerful thermistor workshop

Old Notes

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