Kitronik Heat Activated Switch plus wire cutters
Kitronik Heat Activated Switch plus wire cutters and soldering starter kit
This temperature activated project kit is also available as a light activated project kit. The output of this board can be used to control other electronic circuits, turning them on automatically when it goes hot or cold.
The board has space for an LED with current limit resistor (both available separately) which will light when the output turns on.
The Darlington pair transistor configuration allows an output current of up to half an amp to be controlled. Operating voltage 3V to 10V (lower voltages allow for better adjustment of the switching point).
- The Temperature Switch Kit detects the temperature of its surroundings using a thermistor.
- The kit acts as an automated on/off switch (temperature dependant).
- 1 x 47KΩ Potentiometer.
- 2 x BC337 NPN Transistors.
- 1 x Thermistor.
- 1 x 220Ω Resistor.
- 1 x Heat Activated Switch PCB
Possible applications include:
- Babies bath over temperature indicator.
- Automatic fan.
- PCB Length: 53mm.
- PCB Width: 25.5mm.
- This kit requires soldering.
Teachers can order a sample of this kit (one per school) here.
You will need to select the kit from a list of all the sample kits; the stock code for this kit is 2113.
Note: this service is only offered to schools for evaluation purposes only.
This product is designed and manufactured in the UK by Kitronik.
Same Day Dispatch
- Orders placed online before 3:00pm Monday - Friday (excluding public holidays and our Christmas shutdown period) are always dispatched the same day provided the goods are in stock. If the goods are not in stock we will endeavour to contact you as soon as possible to discuss a dispatch date.
- If you live on the UK mainland and don't have any large materials or lithium batteries in your order it will cost £3.95 (£4.74 including VAT) if you spend less than £40 (£48 including VAT).
- If you spend between £40 and £200 (£48 - £240.00 including VAT, excluding large materials or lithium batteries) delivery is free to most locations, £12 (£14.40 including VAT, excluding large materials or lithium batteries) to Northern Ireland and £15 (£18.00 including VAT, excluding large materials or lithium batteries) to UK remote locations. For a list of postcodes that will be charged the remote location rate click here.
- If you spend over £200 (£240.00 including VAT, excluding large materials or lithium batteries) delivery is free within the UK.
Rest of the world
- These orders are sent via UPS, and the cost is dependant on the service you choose at checkout. Alternatively you can choose the free collection option and have your own courier collect it from us. International orders can only be shipped to the registered card address. Please note: International orders may be charged import duty dependant on local import laws and duty rates. These charges are usually billed to you directly from UPS.
- Delivery times vary for international orders depending on the service selected and the destination. You can see the delivery time and cost at the shipping stage, or by using the shipping estimator from within the shipping basket.
- If you would like to collect your order, or use your own courier then there is an option you can select during checkout. We do not charge a packaging or handling fee for this service, and you will receive an email when your order has been processed, you can collect half an hour after receipt of this email.
- For information about all of the delivery options we offer click here.
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ire being used but it would be somewhere in the hundreds/thousands of feet range. That sounds like it should be workable. I don't know the exact details of the heater and its tolerances for lighting the gas but if you powered the temperature switch kit with 2 D batteries it would output roughly 2V at up to 0.5A which I expect would be plenty for your heater if it is currently running from 1 D battery. (0.9V is lost through the transistor pair on the board.) So you might not need a relay. You could use this relay though http://www.kitronik.co.uk/products/components/relays/5v-relay-single/ but you would need to use 4xAA batteries with the temperature kit to trigger the relay. For your final question I would not recommend using this board to measure a specific voltage, the drop over the darlington pair is about 0.9V which is a massive proportion of the 1.2V your batteries provide. You would be better off using a voltage divider circuit and a single transistor.
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