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Shop a wide selection of cheap alternating flasher modules and kits at Communica. Perfect for electronics projects, education, and industry. Local stock, branch pickup, and fast VAT invoicing.
Save costs with reliable, quality alternating flasher circuits and kits in stock locally.
Choose modules for automotive, indicator lights, or educational breadboards.
Pick up at Samrand, Cape Town, or Pretoria branches with easy VAT invoicing.
An alternating flasher circuit automatically switches two outputs (such as lamps or LEDs) on and off alternately, creating a distinct flash pattern. Commonly seen in vehicle indicators, safety warning lights, security beacons, and beginner electronics kits, these circuits are essential for both teaching and practical signaling use-cases across South Africa.
While building from scratch is a great learning experience, ready-to-use alternating flasher modules ensure consistent performance, meet time constraints, and are cost-effective-especially for repeated classroom or field use. Communica stocks budget-friendly solutions ideal for design, repairs, or prototyping with low minimum orders.
| Spec | Common Range | Typical SA Use |
|---|---|---|
| Supply Voltage | 5V, 12V, 24V DC | Automotive: 12V; Education: 9V/5V |
| Output Type | Transistor, Relay | Direct drive or relay switching for bigger loads |
| Flash Rate | 0.5-2 Hz (adjustable) | Often fixed or trimmable |
| Mounting | PCB, DIN rail, enclosure | PCB modules for practice, enclosures for vehicles |
Discuss your voltage and output device in advance: for example, a 12V flasher is best if used with vehicle lamps, while a 5V version is safe for classroom LEDs and microcontrollers. Flash rate trimmers let you fine-tune the pattern for your exact application.
Most budget flasher modules use the classic astable multivibrator circuit with two transistors or a 555 timer IC. Output alternates between two channels, making them perfect for left/right, warning, or mimic signaling.
+9V
|
[R1]---+-----+---[C1]---+-----+---[R2]---+---GND
| | | |
[Q1] [Q2] [LED1] [LED2]
Two NPN transistors with cross-coupled capacitors drive alternate LEDs. In commercial modules, relays or solid-state drivers allow the circuit to switch higher loads, such as indicator bulbs. The flasher rate is set by the resistor-capacitor values (R and C).
For dependable and affordable alternating flasher circuits and kits, Communica supports the full electronics lifecycle-educational modules, rapid prototyping parts, and industry-ready assemblies. With easy branch pickup, ZAR-matched stock, and educational VAT support, sourcing your next flasher project has never been easier.
Free shipping for orders over ZAR 1,000.00.
Get a full refund if you had the product for less than 7 days.
Nationwide delivery within 2 - 4 working days.
Very friendly and helpful; and a wide selection of items (at their location). You can also purchase via their WebSite; I have never been disappointed...
Review for Communica Samrand Security Wanted to share a heartfelt thank you to the security team at Communica Samrand! Yesterday, I had a personal ex...
Quick service from Layla and her team in providing technical assistance and getting my order together. This is the best service I have received in a l...
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Visited a couple of times for supplies and specialised parts Staff is extremely friendly and always helpfull
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Got assisted by a very patient and diligent gentleman by the name Sydney. He was patient in getting me what I needed from the little information I gav...
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Fatima was very helpful and patient with my many queries. The shop itself has seen better days but the service was great.
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Online support and communication is next level - great communication, fast response - very helpfull, recomended supplier - online payment was no hasse...
He's polite, good with people and made me feel free to talk.. all in all he's helpful
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Best service received from Rocket! What a pleasure dealing with him. Thank you Rocket
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Excellent service so far
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Leburu and nicole were both very helpful my boss send me to get few items as I wasn't very familiar with the items Leburu and my boss spoke with each ...
Sydney and Nicole were amazing I came in and finished within no time thank you so much keep up the friendly service
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Sydney and Nicole were absolutely fantastic and helped me with my purchases. Thank you.
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Needed to buy a bluetooth GPS receiver. The staff was friendly, knowledgeable and assisted without any issues. This is a toys tore of note for peopl...
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They have mostly any electronic tool and components that you may require - Thanks to Nicole for helping me.
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One of the cashier services rendered to me was here at communica by the lady named Nicole and her manager dolly they were both willing to go above and...
The service was excellent, Nicole and Rehaan were very helpful and professional in their work.
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Great service, Rehaan and Layla were spectacular with assistance. 10/10 Would definitely recommend.
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Mohamed Sharief is a great asset to Communica. He provides a 5 star service and good product knowledge. Keep up the good work.
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I received a great service from Rehaan, Windy and Nocole. Excellent customer service.
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Quick quality customer service.
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Very good service and a happy welcoming smile from the cashier Nicole
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Verified customerNicolene
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After being supplied the incorrect track for my garage motor, despite me asking twice if it was the correct track, I had to return to the store to exc...
They have most every electronics component you might need. Staff are knowledgeable and friendly. I was looking for a bespoke miniature item for a lapt...
Great service as always from Nicole and Sydney especially Mpho at the sales desk
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I visit Communica once in a blue moon. Always wish i have more time to look at everything. Good & friendly service. Nothing wrong with a queuing syste...
Currently have only purchased items from their on-line store. Received what I ordered plus quick delivery. No complaints to date.
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I needed a heat-sensitive diode as one of my Philips appliances had had a failure. Philips wants you to throw the entire thing away, but I tried look...
I got the most pleasant service from Sydney and Windie
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Wide range of electronic components. Very likely to find what you are looking for. Arthur was very helpful. Don't bother trying to call for informatio...
Great place. Reasonable prices. Keeps component level items as well as security, surveillance and electrical items and tools
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Great pricing and a wide variety of products to choose from. A must visit if you've ever been to the Pretoria branch.
Verified customerNicole was very helpfull and friendly.
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Verified customerFor Sonoff ewelink WiFi switch.
Verified customerThank you for your patience ma'am Mpho
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Verified customerBig electronic component shop. Counter can be very busy. Lots of parking.
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