You can now checkout in your own currency.

  • Call/Text: +61 45 1746 024
  • Email:
  • Tutorials


This product is shipped from Sydney, Australia. Worldwide shipping available- we ship to USA, Canada, New Zealand, UK, EU and Non-EU countries.

Description: This is a simple 4-in-1 do-it-yourself (DIY) kit from BuildCircuit. The kit has four different circuits that can be switched on separately or together at a time using a DIP switch.

The four circuits are:

1. Dark sensor using LDR.

2. A latch circuit using NE555 timer.

3. Astable circuit using NE555 timer.

Besides these 4 circuits, by changing the values of the resistors and capacitors, you can change the behavior of the circuits. For example, in the astable circuit, if you change the resistance values, it works as an Infrared (IR) transmitter and you can use it in remote operated switch circuits. 
Get the schematic and description from this page. 

 You get the following components with this kit package: 

1. LDR- 1 pc 
2. 8 pin DIP switch- 1pc 
3. Electret Microphone- 1pc 
4. Screw terminal- 1pc 
5. Tactile switch- 1pc 
6. 3mm LED- 4 pcs (color: red/white/yellow/green/blue)- Can be any color 
7. 0.1uF ceramic disc capacitor- 3 pcs 
8. Electrolytic capacitors- 3 pcs (1uF, 10uF and 220uF) 
9. NE555 timer- 3 pcs 
10. BC547(NPN transistor)- 4 pcs 
11. PCB- 1pc 
12. 9V battery clip- 1 piece 
13. Resistors pack(click on the links for color codes ): 10K (5 pcs), 330R (5 pcs), 4.7K (2 pcs), 1K (2 pcs), 100K (2 pcs)
The PCB: 
4 in 1 - Copy
Other documents:
  • All the order are shipped within 2 business days. 
  • Products are either shipped from China or Australia. Item locations are mentioned on the product page.
  • Customers will receive tracking code if they have selected the 'shipping method with a tracking code'.
  • Returns are accepted if the customers return the items within 1 month to our address in Australia. If the item has been shipped from China, the customer still has to return the item to Australia. 
  • Return post fees have to be paid by customers. If the product is defective, we will pay the shipping fees.


Shipping fees for Australian addresses(Item Location: Australia):

  • Standard Post- using Australia Post: US $5.95 ~ AU $9.00 
  • Express Post: US $9.95 ~ AU $15.00


Shipping fees for international addresses (Item Location: Australia):

  • Standard Post with tracking code: US $17.50 ~ AU $26.50
  • Express Post with tracking code: US $36.50 ~ AU $55.00


Shipping fees for Australian and international addresses:(Item location: China):

  • Registered post with a tracking code: US $3.95 ~ AU $6.00 
  • Express Post with tracking code: US $25.00 ~ AU $38.00 


How long does it take to reach the USA, UK, Germany, Australia Canada and other EU countries?  

From China: If we ship from China, the delivery time can be from 7 working days to 15 working days. See the proof on the images below. US based orders are delivered more quickly than other countries.

Most of the USA, UK, Canada, Australia, and Germany  based orders are delivered within 7 days. However, because of customs related processes, it can sometimes take up to 15 days.  Check out all the shipment proof images on this page. 


From Australia: If you have chosen standard post, you will receive your parcel in 3-5 days (in Australia) and 5-7 days (outside Australia)

If you have chosen economy post, you will receive your parcel in 3-5 days (in Australia) and 15-25 days (outside Australia)


What is the proof that we really ship and they are delivered ?

 Check out all the shipment proof images on this page. 


Where do we ship from ? 

We ship our products from Australia and China depending upon what you purchase. BuildCircuit's original products are shipped from Australia. 

Check out our featured and best-selling products

You may also like

translation missing: