‰12. Install U21, the PIC12C509A (marked RR). Make sure the notch indi- cating pin one is in the same orientation as shown on the silkscreen and Parts Layout Diagram. This is the “brains” of the RRW1B, generating your 38 kHz signal depending on the data seen from the receiver.

‰13. Install C26, a 0.1 uF ceramic capacitor (marked 104).

‰14. Install JMP1 using a spare piece of component lead formed into a sta- ple like shape. Since this layout is on a single sided board, some routes just couldn’t be performed without adding this jumper.

‰15. Install U20, the MIRCF001 IC (14-pin). Note the orientation of pin 1, it is opposite of U21. Use the notch to align with the pin one indicator on the IC itself. Make sure all 14 pins are through the holes before soldering.

‰16. Install R21, a 1M ohm resistor (brown-black-green) just above U20.

‰17. Install R20, a 100K ohm trimmer potentiometer (yellow top marked 104). This trimmer is used to set the squelch of the receiver so that con- stant noise isn’t sent while data is not being received.

‰18. Install C25, a 1 uF electrolytic capacitor. Again check polarity before soldering.

‰19. Install X20, the 3.3149 MHz crystal. This crystal is used as reference by the receiver to set it to receive 433.42 MHz. Internal to this part there is a Colpitts oscillator much like the one used in the RRW1A transmitter board used to make the crystal oscillate.

‰20. Install C22, a 10 uF electrolytic capacitor. Again note polarity.

‰21. Install R26, a 22M ohm resistor (red-red-blue). Yes this resistor value is very large. It is a “tweak” which prevents the data detect output from swinging to the wrong direction when no signal is present and making it look like it is always receiving a signal (a little quirk U20 tends to have).

‰22. Install C21, a 0.1 uF ceramic capacitor (marked 104).

‰23. Install C30, another 0.1 uF ceramic capacitor (marked 104).

‰24. Install C27, a 10 pF ceramic capacitor (marked 10 or 10K).

‰25. Install L20, a 33 nH four turn inductor. Be careful not to distort the shape of the coil when installing it.

‰26. Install R24, a 100K ohm resistor (brown-black-yellow).

‰27. Install Q20, a 2SC2498 or C2570 UHF NPN transistor. This transistor is used to help increase the reception range of your receiver by boosting the signal seen at the antenna a bit more before going to the receiver IC.

RRW1B • 11

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Ramsey Electronics rrw1b manual RRW1B
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rrw1b specifications

The Ramsey Electronics RRW1B is a versatile and compact wireless transmitter and receiver system designed for various applications, including remote control and communications. This innovative device operates on the 27 MHz band, offering a robust solution for users seeking reliable wireless connectivity. One of the standout features of the RRW1B is its impressive transmission range, allowing for operation up to 1000 feet under optimal conditions. This makes it suitable for both hobbyist projects and professional applications where distance and reliability are critical.

The RRW1B utilizes frequency modulation (FM) technology, which ensures clear signal transmission and minimal interference from other devices operating on similar frequencies. Its design incorporates advanced circuitry that enhances its performance, contributing to a stable link between the transmitter and receiver while effectively reducing noise. This technology is particularly beneficial for applications in remote sensing, data logging, and control systems where accuracy is paramount.

Another notable characteristic of the RRW1B is its user-friendly interface, which allows for easy setup and configuration. The system is designed with the end-user in mind, featuring color-coded terminals and intuitive controls that facilitate straightforward installation. This aspect makes it accessible to both beginners and experienced technicians, reducing the learning curve typically associated with wireless systems.

The RRW1B is also characterized by its low power consumption, making it an energy-efficient choice for long-term use. This is particularly advantageous for battery-operated devices, extending their operational lifespan and reducing the frequency of battery replacements. Moreover, the RF (radio frequency) modules used in the RRW1B are known for their durability and resilience, ensuring that users can rely on the system in various environments, including those with challenging electromagnetic conditions.

In summary, the Ramsey Electronics RRW1B stands out due to its excellent range, FM technology, ease of use, and energy efficiency. These features make it a popular choice among hobbyists and professionals alike, providing a seamless wireless solution for a myriad of applications. Whether users are looking to enhance their home automation systems, develop remote-control gadgets, or implement wireless data communication, the RRW1B proves to be a capable and dependable option. Its combination of performance, simplicity, and versatility makes it a valuable addition to the toolkit of anyone interested in electronics and wireless technology.
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