Search found 9 matches

by DaveJ
Sun Oct 05, 2014 10:56 am
Forum: Random Chit-Chat
Topic: <SOLVED> Using Arduino to sense temp (automotive)
Replies: 3
Views: 11771

Re: <SOLVED> Using Arduino to sense temp (automotive)

Hi Mike, For memory all I did in the end was to get hold of the datasheet from here --> http://www.bosch-motorsport.de/media/catalog_resources/Temperature_Sensor_NTC_M12_Datasheet_51_en_2782569739pdf.pdf Then worked out the voltage divider needed to get a reasonable voltage at the arduino for the te...
by DaveJ
Sun May 25, 2014 12:59 pm
Forum: Experimenters Kit
Topic: Servo in the Experimenter's Kit
Replies: 12
Views: 9883

Re: Servo in the Experimenter's Kit

Hi John, found out it was at my end. The ISP was not letting my mail through from the account I sent the email from. Sent it from my work account and it all worked :)
Thanks for your support :)
by DaveJ
Sat May 24, 2014 10:42 am
Forum: Experimenters Kit
Topic: Servo in the Experimenter's Kit
Replies: 12
Views: 9883

Re: Servo in the Experimenter's Kit

G'day Johnb and everyone else. The email bounced with the following message Your message did not reach some or all of the intended recipients. Subject: New servos as found in freetronics experimenters kit Sent: 24/05/2014 9:41 AM The following recipient(s) cannot be reached: 'support@freetronics.com...
by DaveJ
Sat May 24, 2014 2:20 am
Forum: Random Chit-Chat
Topic: Interception control input
Replies: 1
Views: 1695

Re: Interception control input

by DaveJ
Sat May 24, 2014 12:56 am
Forum: Random Chit-Chat
Topic: The bleeder resistance
Replies: 5
Views: 3670

Re: The bleeder resistance

The FSS1 relay is a solid state relay. I don't think you would need a bleeder resistor in parallel with it. This relay doesn't have a coil in it so the transistor doesn't need any protection from high voltage spikes when the relay is switched from on to off. That is when you usually use a bleeder re...
by DaveJ
Sun Apr 13, 2014 4:46 am
Forum: Experimenters Kit
Topic: Servo in the Experimenter's Kit
Replies: 12
Views: 9883

Re: Servo in the Experimenter's Kit

G'day All, Was wondering if Freetronics could supply me with extra servos as found in the experimenters kit? They are the smallest I have seen and will fit a project I have in mind quite well.
Regards,
Dave J
by DaveJ
Sat Oct 19, 2013 8:39 am
Forum: Random Chit-Chat
Topic: <SOLVED> Using Arduino to sense temp (automotive)
Replies: 3
Views: 11771

<SOLVED> Using Arduino to sense temp (automotive)

I have since researched and found that this is the correct way of interfacing with a thermistor such as a coolant temperature sensor for an automotive application. To get a readout temp you would need to use the Steinhart-Hart equation and find the values for A,B and C See here --> Steinhart-Hart eq...
by DaveJ
Sat Oct 19, 2013 3:05 am
Forum: Random Chit-Chat
Topic: <SOLVED> Using Arduino to sense temp (automotive)
Replies: 3
Views: 11771

<SOLVED> Using Arduino to sense temp (automotive)

Hi All, I want to be able to sense temperature of an engine using a standard 40 - 120 degree VDO sender unit. I want to use ATTiny85 with AnalogInput(). The docs use a pot with one end connected to +5v, the other connected to GND and the wiper connected to an analogue pin. Could I do it like the att...
by DaveJ
Fri Jul 26, 2013 11:16 am
Forum: Eleven
Topic: I found out what happens when I short output pins to GND
Replies: 1
Views: 1434

I found out what happens when I short output pins to GND

G'day All, This is a post on what not to do. I decided one day to hook up a transistor to pin 13 of my freetronics eleven. This was ok, I made sure I had the right transistor and had the load working on it properly with all the connections correct. The only thing I didn't do was to put a resistor in...