SCR Ring Counter Manufacturer,Supplier and Exporter in India
Product Code : EL-PET-1423
Jlab Export is a leading SCR Ring Counter Manufacturer,and suppliers in India
SCR Ring Counter (code EL-PET-1423) is a power electronics training board with a three-stage ring counter in which three SCRs switch loads on one after another, with an adjustable time delay between steps. The same set-up can also be run as a sequential flasher. Jain Laboratory Instruments Pvt Ltd (JLab) manufactures the board in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Experiments | Operation of the ring counter with internal load; operation of the ring counter with external load |
| Stages | Three, formed by three SCRs; can be extended to any number of stages by adding identical circuitry |
| Trigger pulse source | UJT 2N2646 in relaxation-oscillator configuration, providing the triggering pulses to the SCRs |
| UJT under experiment | 2N2646 |
| Control supply | 20 V DC, zener regulated, for the control pulse generator |
| Time delay | Potentiometer for variable time delay between sequences |
| Trigger diodes | Three diodes for providing the triggering pulses |
| Sequence indication | Three dual indicating lamps |
| Protection | Fuse |
| Other components | Adequate number of other electronic components |
| Operating supply | 220 V DC source |
| Patch cords | Adequate number, stackable, 4 mm spring-loaded plugs, ½ metre long |
| Terminals | Terminals and sockets on the panel for connections and observation of waveforms |
| Operating instructions | Detailed: object, theory, design procedures, report suggestions and book references |
| Weight | 4 kg (approx.) |
| Dimensions | W 412 × H 150 × D 310 |
| Other apparatus required | 220 V DC, 100 mA IC-regulated power supply |
| Packing | Corrugated box |
| Quality check | Each board is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-PET-1423 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the SCR Ring Counter Used For?
In a ring counter only one stage conducts at a time, and each trigger pulse passes conduction on to the next stage, so the loads switch in a repeating sequence. With SCRs as the switching elements, the board teaches two ideas together: how a UJT circuit generates the trigger pulses, and how a commutation circuit turns each SCR off in the sequence — necessary on DC, where an SCR does not switch off by itself once triggered. Sequential switching of this kind lies behind running-light displays and step-by-step control of high-power loads, and it is a useful practical in power electronics and industrial electronics courses.
What to Specify When Ordering
- How many ring counter boards you need.
- Whether the DC power supply that runs the board should be quoted with it.
- Related thyristor boards, such as Triggering Circuits for SCR or Forced Commutated Circuits, if you are setting up a full practical sequence.
- The destination, the delivery terms and any tender reference.
Frequently Asked Questions
What supply does the SCR Ring Counter need?
It operates from a 220 V DC source, so a separate 220 V DC, 100 mA IC-regulated power supply is required. A 20 V DC zener-regulated supply on the board feeds the control pulse generator.
How is the time between steps adjusted?
With the potentiometer for variable time delay on the board. The steps themselves are driven by trigger pulses from the 2N2646 UJT relaxation oscillator.
Can the counter have more than three stages?
Yes. Three SCRs form the three stages on the board, and the counter can be extended to any number of stages by adding identical circuitry, if required.
How does it differ from the SCR Lamp Flasher?
The SCR Lamp Flasher uses two SCRs and a TRIAC for a symmetrical DC flasher and a high-power AC flasher, and runs from the AC mains. The ring counter switches three SCR stages in sequence and works from an external DC source.
What information does JLab need for an export quotation?
The number of boards, the destination country and port or city, the delivery terms you prefer, such as FOB or CIF, any packing or labelling requirements, and the tender reference for tender orders.
Who manufactures the SCR Ring Counter?
Jain Laboratory Instruments Pvt Ltd (JLab) builds it at its own works in Ambala, Haryana, India.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, an Indian manufacturer of power electronics trainers and other laboratory equipment, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. Because the ring counter is made in-house and not resold from a trader, engineering colleges, polytechnics, dealers and importers receive it straight from the manufacturer; every board gets a visual inspection before dispatch, and follow-up orders are handled by the same factory. JLab exports worldwide and ships to buyers in every region — for example Slovakia in Eastern Europe, Denmark in Northern Europe, El Salvador in Central America and the Caribbean, Japan in East Asia and Bhutan in South Asia. Tender-related information is on the JLab lab tenders page.
Related SCR Trainers and Power Supply
- SCR Lamp Flasher — a board with a UJT-triggered SCR DC flasher and a TRIAC AC flasher.
- Triggering Circuits for SCR — for studying R, R-C and UJT triggering of SCRs and controlled rectifiers.
- UJT Relaxation Oscillator — a board on the UJT relaxation oscillator and its use as an SCR trigger circuit.
- Forced Commutated Circuits — for studying Class A to Class E commutation of SCRs.
- Thyristor Time Delay Relay — a UJT timer board for delayed turn-on and automatic turn-off of loads.
- 300V DC Power Supply — a DC supply adjustable from 10 to 300 V with an adjustable current limit; a separate item that can be quoted on the same enquiry.
Browse the Power Electronics Trainers range or all Electronics Lab Equipments.
Request a Quote
Send your requirement with the Add To Cart enquiry button on this page or through JLab’s contact page, stating the number of boards, the delivery location and whether a DC supply should be added to the quotation.
Last updated: 22 October 2026
