SCR Ring Counter
Product Code : JA-PET-1423
The SCR ring counter trainer is a power electronics board with three SCR stages that switch lamp loads on in sequence, with an adjustable delay between steps. A UJT 2N2646 relaxation oscillator supplies the trigger pulses, and the circuit can be extended to more stages with identical circuitry. It is intended for science and engineering practicals (SKU JA-PET-1423).
Specifications
Parts and ratings built into the ring counter board:
| Product | SCR Ring Counter |
| SKU | JA-PET-1423 |
| Stages | Three SCRs forming a three-stage ring counter; extendable with identical circuitry |
| Trigger source | UJT 2N2646 in relaxation oscillator configuration |
| Control supply | 20 V DC zener regulated, for the control pulse generator |
| Time delay | Adjustable by potentiometer |
| Trigger diodes | Three |
| Indicators | Three dual indicating lamps showing the sequence |
| Protection | Fuse |
| Operating supply | 220 V DC source |
| Patch cords | 4 mm stackable spring-loaded plugs, 0.5 m |
| Weight | 4 kg approx. |
| Dimensions | W 412 x H 150 x D 310 mm |
| Other apparatus required | 220 V DC, 100 mA regulated power supply |
Experiments on the SCR ring counter
The operating instructions list two studies, and the board also shows sequential switching of high-power loads:
- Operation of the ring counter with its internal load
- Operation of the ring counter with an external load
- UJT triggering of SCRs and the commutation circuit that turns each stage off
- Sequential flash-over switching with an adjustable step delay
Scope of supply and ordering
The listing covers the three-stage SCR ring counter board with patch cords and operating instructions, supplied by JaincoLab; the 220 V DC supply is listed as other apparatus required. Quantities, packing and delivery lead time are stated on each quotation.
Frequently asked questions
How many stages does the SCR ring counter have?
Three SCR stages. The circuit can be extended to more stages by adding identical circuitry.
What triggers the SCRs?
A UJT 2N2646 in relaxation oscillator configuration, with three diodes passing the trigger pulses to the SCRs.
What supply does the board need?
It operates from a 220 V DC source; a 220 V DC, 100 mA regulated power supply is listed as other apparatus required.
Related products
Related items are grouped in the JaincoLab power electronics trainers range.
Request a quote
Enquiries for the SCR Ring Counter can be sent with the quantity needed through our contact page. Institutions and contractors buying under a tender can also reach us via the tenders page.
