Loading... Please wait...


BuildCircuit is an online store for selling electronics kits and components related to Arduino, Raspberry Pi, etc. We operate from Sydney, Australia.

We design and sell basic electronic kits and Arduino modules for all electronics enthusiasts.


2 Digit Digital Object Counter module and Infrared Transmitter

2 product reviews Write A Review
AU $19.95
Calculated at checkout
Current Stock:
Out of Stock
Out of Stock







Description: A digital object counter can be used for counting objects. It can used for fun at home for counting objects or people entering inside a room. Since it's a DIY kit, it can obviously used for learning basic electronics.

This DIY digital object counter works with TSOP4838 infrared receiver and there are two seven segment displays displaying numbers from 0 to 99. An IR transmitter is oriented towards the TSOP4838 infrared receiver of counter module and objects are moved between the two modules. Each time an object passes between the two modules, the seven segment displays show increment in numbers.

Comes as a pack of parts kit and is easily assembled if you can follow the silkscreen indicators(labels) and have beginning experience with a soldering iron. You will need to read the resistor bands or use a multimeter to determine the resistor sizes.

Both the kits operate with 9V batteries.


The distance between the transmitter and receiver modules can be around 1 meters.

The counter module can be reset to 0 at any time and restart the counting.

The counter module can be operated with any kind of remote control. Therefore, it can also be used as a remote tester. For each press on the remote control, there is an increment in number.  

Kit package contains components for counter and IR transmitter modules:

A. Components for counter module (altogether 26 components)

1 x TO-92 5V Voltage Regulator(78L05)

2 x CD4026 Decade counter

2 x 16-pin IC socket.

2 x common cathode seven segment display-(Can be in red, yellow and blue colors)

1 x TSOP4838 Infrared sensor

1 x 100uF Capacitor- (Voltage rating can be between 16V to 50V- causes no problem in operation)

2 x 0.1uF 50V ceramic Capacitor

2 x 3mm LED- (can be any color)

1 x BC547

1 x BC557

1 x SPDT Slide Switch

1 x Tactile reset switch

1 x Screw terminal- (can be in blue/green colors)

4 x 1K Ohm Resistor 1/4W

1 x 330R Resistor 1/4W

1 x 10K Ohm Resistor 1/4W

1 x Bare PCB with Silkscreen Indicators- now in RED Color (udpated: 4.4.2016)

1 x 9V battery connector

We may send 4 color or 5 color code resistors.

B. Components for IR transmitter module (altogether 12 components)

1 x NE555 timer chip

1 x 8-pin IC socket.

1 x Infrared LED

1 x 0.1uF 50Vceramic Capacitor - code 104

1 x 0.001uF 50V ceramic Capacitor - code 102

1 x SPDT Slide Switch

1 x Screw terminal

1 x 330R Resistor 1/4W

1 x 10K Ohm Resistor 1/4W

1 x 18K Ohm Resistor 1/4W 

1 x Bare PCB with Silkscreen Indicators

1 x 9V battery connector

We may send 4 color or 5 color code resistors.


Product Reviews

As we are getting few reviews for our products, we are displaying feedback from our store on Ebay. Please leave your feedback if you purchase a product from our store. Click on the image below to see all the recent feedback

Write Review

  1. true to description

    Posted by Jason Antonsen on 21st Nov 2016

    received it a week ago. soldering was easy. The tutorial is very clear and could follow it easily. good for beginners like me. Cheers !

  2. Received the kit very quickly

    Posted by Unknown on 22nd Sep 2016

    As usual the kit was delivered quickly. I appreciate your service. Thank you.

Information about shipping

BuildCircuit is a trustworthy online store established in Sydney, Australia. We have been maintaining our quick shipping service since we started the store in Turku, Finland(in 2012).

Shipping information for international customers

We ship our products to more than 45 countries using Australia Post. Our regular customers are from the USA, Canada and Europe. We are currently using four different shipping methods to ship the orders to international destinations. We request you to select 'Standard Post' or 'Registered Post' while checking out so that you can receive your package quickly.

We usually ship your orders within 1-2 days. Small orders are usually processed and shipped on the same day.

Shipping information for Australian customers

All the orders from Australia are shipped on the next day at 9.00AM. Orders with Express Australia Post are also shipped on the next day if your order is placed before 1.00PM. We provide tracking code for Standard, Registered and Express Post orders only.

Australia Post has never lost any package since we started our business in Ausralia. So, we request you all to buy with confidence.

Are we reliable ? How to know we are genuine sellers ? How is your payment safe ?

1. If you make a payment via Paypal and if we don't ship, you can open a case on Paypal and ask for refund. Paypal will be on your side and they will make full refund.

2. We have been selling on Ebay also and we are TOP RATED SELLER on Ebay. Please check our store: http://stores.ebay.com.au/buildcircuitstore

3. This is our SSL seal from GeoTrust. Please click on the seal

4. We have a popular blog www.buildcircuit.com and people from all over the world read our posts. We are seriously in the business, therefore, we WILL ship your orders

For International Customers: For registered and express post orders, you will receive a notification on your email after the package is landed in your country. Examples given below:


Find Similar Products by Category

Back to Top