Audible Logic Probe using 555 Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12735
Indian Lab Suppliers supplies the Audible Logic Probe using 555 (Product ID: 12735) as part of its electronics engineering lab equipment range. It shows how a 555 timer and a comparator IC make an audible logic probe that signals logic states by tone.
Quick Answer
When the probe tip senses a logic high the speaker gives a high-pitched tone, a logic low gives a low tone, and a pulse train produces a warbling high-low tone. A selector switch sets the thresholds for TTL or CMOS circuits. The board has 5 V and 12 V DC (100 mA) regulated supplies, a 0–12 V DC, 20 mA continuously variable supply, a quad comparator IC, a timer IC, an 8 Ω speaker and a 3½-digit digital panel meter for DC voltage. It runs from 230 V ±10%, 50 Hz mains.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiment | Construction and operation of an audible logic probe (TTL and CMOS) |
| Fixed supplies | 5 V and 12 V DC, 100 mA, IC regulated |
| Variable supply | 0–12 V DC, 20 mA |
| Digital panel meter | 0–19.99 V DC, 10 mV resolution, ±0.2% ±1 digit, 10 MΩ input |
| Display | 3½-digit, 12.5 mm 7-segment LED, auto polarity, overload indication |
| ICs | 555 timer, quad comparator |
| Output | 8 Ω speaker |
| Mains | 230 V ±10%, 50 Hz AC |
Where This Is Used
Used in digital labs and workshops for fault-finding practice; related boards include the Characteristics of CMOS IC (Product ID: 12739) and the TTL and CMOS Characteristic Trainer (Product ID: 12760). Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
What does a warbling tone mean?
The tip is on a pulse train that alternates between high and low.
Can it test CMOS as well as TTL?
Yes, a selector switch chooses TTL or CMOS levels.
What is the meter used for?
Measuring DC voltage from 0 to 19.99 V.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
Request a Quote
For pricing, bulk quantities or tender documentation on the Audible Logic Probe using 555, reach our team via Contact Us or submit your requirement through our Tenders page.
.png)
.jpg)
.jpg)
.jpg)
.png)
.jpg)