Here is an improved rendition of the RF detector circuit that we have examined beforehand. Basically, the sensitivity of the circuit is practically twofold as contrast with the previous one. In the event that you haven’t perused the past article? Here you can locate the full instructional exercise ‘RF Detector by utilizing 2N4401 and 2N4403 transistors’ in detail.
Giving you some essential information as, an RF detector or an RF receiver circuit is an electronic device that is utilized to detect RF signals, Radio waves, frequencies of various radio gadgets, and electrical and electromagnetic waves.
In the past circuit we have utilized a 2N4403 transistor to enact the bell however in this circuit we have utilized a PNP Darlington transistor BC516 that has more features in contrast with the 2N4403 transistor.
Furthermore, the circuit is utilizing two 1N34 germanium diodes which can be supplanted by some other comparative germanium diodes. Hence, for good execution utilize a 30 inches telescope receiving wire or antenna. However, the circuit can be controlled by any 9 or 12-volt battery.
Hardware Components
The following components are required to make RF Detector Circuit
| S.no | Components | Value | Qty |
|---|---|---|---|
| 1 | Germanium Diodes | 1N34 | 2 |
| 2 | Darlington Transistor | BC516 | 1 |
| 3 | NPN Transistor | 2N4401 | 1 |
| 4 | Buzzer | – | 1 |
| 5 | Antenna | 30 inches | 1 |
| 6 | Resistor | 10kΩ, 2.2kΩ | 1, 1 |
| 7 | Battery | 9V – 12V | 1 |
BC516 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of BC516
RF Detector Circuit
Working Explanation
RF signal detector is a gadget that changes the sinusoidal RF signal into a DC voltage for the purpose of estimating the power level of a signal. Working of the circuit is straightforward when the two 1N34 germanium diodes get an RF signal then they convert it into a DC signal. This DC signal is further amplified by the NPN transistor 2N4401 and sends it to the base of the PNP Darlington transistor BC516. Thus doing it switch ON and enact the bell. You can likewise utilize the OA91 germanium diode in the spot of 1N34. Thus, for good execution utilize 30 inches telescope antenna.
Applications and Uses
- RF detectors are likewise utilized to identify RF power in remote systems.
- Utilizes in Voltage standing-wave ratio (VSWR) estimation and likewise utilizes in some other mainstream applications in high-power RF speakers
- Moreover, it is utilized to identify electrical and electromagnetic clamor in the circuit premises.
