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Thermostat with remote control via the telephone

Velleman K6502: Telephone Remote Controlled Thermostat Kit

Velleman K6502

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Remote Control Thermostat with Telephone Kit

The thermostat is used as any other one, but with the added facility of choosing the day or night temperature setting by means of a telephone. The remote control facility is operated via the telephone keypad, thus a DTMF type phone is required. From audio signals sent down the line, the user receives a report back on how the thermostat is set. Switching is protected by a security code, set by the user, which is keyed into the telephone in a simple manner.


  • separate settings for day and night temperature with LED indication
  • relay output with LED indication: 5A / 240V AC (1200W)
  • telephone pick-up after ± 3 or 8 rings
  • report when the temperature has fallen below 37.4°F
  • automatic hang-up if no code is received within 40 seconds
  • possible security codes: from 000 to 999
  • day temperature: from 57°F to 79°F
  • night temperature setting: from 43°F to 64°F
  • hysteresis (allowed temperature swing): 0.1°F
  • local manual control
  • supply voltage: 220VAC

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Info Sheets

Resistor colour code

Overview of Velleman modules that are equal to D.I.Y Kits
This sheet is useful when you want to know which modules you could find in the do-it-yourself range of Velleman Kits and minikits.

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 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product