Asked by: Andrew Trent
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Kitronik Rear Bike Light Project Kit plus batteries
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Kitronik Rear Bike Light Project Kit plus batteries and soldering starter kit
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Description
This easy-build bike light kit has just ten parts, making it a good introduction to electronics. The kit uses two ultra-bright red LEDs, which flash rapidly, providing a highly visible light. Making it ideal for use as a rear bike light.
Alternatively, it can be used as a night safety product or for flashing eyes.
Features:
- Easy build kit making a great introduction to electronics.
- Great visibility for nighttime safety.
Contents:
- 1 x 2xAA Battery Cage with Leads.
- 2 x 470K Resistor.
- 1 x 33R Resistor.
- 2 x Capacitor, Electrolytic, 16V, 10uF.
- 2 x BC547 NPN Transistor.
- 2 x Red 5mm Water Clear LED - 30deg - 1000mCd.
Dimensions:
- Length: 48.5mm.
- Width: 25.5mm.
Requires:
- 2 x AA Batteries.
- Soldering Iron.
- Solder.
- Wire Cutters.
This easy build bike light kit has just ten parts, making it a good introduction to electronics. The kit uses two ultra bright red LEDs, which flash rapidly, providing a highly visible light. Making it ideal for use as a rear bike light.
Alternatively, it can be used as a night safety product or for flashing eyes.
Caution:
- This is an educational kit and should be used in conjunction with a commercially available bike light.
Free samples:
Teachers can order a sample of this kit (one per school) request a sample kit.
You will need to select the kit from a list of all the sample kits; the stock code for this kit is 2106.
Note: this service is only offered to schools for evaluation purposes only.
Buy British:
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.
UK Deliveries
- 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: remote area list.
- 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.
Collection
- 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.
Further Information
- For information about all of the delivery options we offer see full delivery details.
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Q:
Is there any way a switch can be fitted to this ?
Kind regards
Andy
A:
Hi Andrew, Yes it is possible to add a switch to the kit, there is an example of doing this in the build instructions on page 4 of the following document, https://www.kitronik.co.uk/pdf/2106_rear_bike_light_essentials_2_0.pdf
Answered by: Michael Lockhart
27-Mar-18
Q:
How long should these batteries last, I am looking for some kits suitable for dummy alarm boxes, ideally to last about 1 year, even if only 1 led, what do you suggest?
Asked by: Domby
A:
A good quality set of AA batteries will give you a capacity of 1500mA/h. The kit takes approximately 10mA so will last about 150 hours which is about a week. The only way you will get the battery life up is to have the LED on very briefly compared to the amount of time it is off. If you have an LED on for a tenth of a second every 5 seconds then it will use a fiftieth of the power. At which point it should work for about a year. I couldn't guarantee it would work with the bike light kit. We don't however do anything that would do this but it could be implemented with a 555 timer or a PIC microcontroller. However if you plan on doing it you will need to consider that the IC is going to take some current and make sure this is kept to a minimum. i.e. PIC chips have a low power sleep command and 555 timers are also available in a low current version. website It may be possible (but I've not tried) to remove LED2 and then increase the value of R2 and/ or C2. If this does work then I suspect that as the LED turns on / off that it will fade up / down as the transistor is working at the switching point. It therefore might not give the current saving you're looking for.
Answered by: Geoff Hampson
28-Aug-12
Q:
Will this circuit work if I substituted the AA battery holder with 1 Coin type battery both will be at3v. Will the coin battery have enough power. The reason for asking is that with the AA battery holder it make the project rather bulky.
Asked by: graham
A:
Yes if you use a CR2032 coin cell it can deliver up to 10mA which is enough to run the circuit. It should last for around 10 to 15 hours.
Answered by: Geoff Hampson
21-Mar-12
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