Install R4, another 1 M ohm resistor (brown-black-green).

Install C28, 10uF electrolytic capacitor. Remember the polarity yet again.

Install C29, 10uF electrolytic capacitor. Placement.

Install C9, 10uF electrolytic capacitor. Watch your placement..

Install C2, yup, another pesky 10uF electrolytic. The lead with the band goes in the hole opposite the one marked with the “+” sign, as usual.

Install R1 and R2, both 1 M ohm resistors (brown-black-green).

Install H2, one of the three pin headers. The long pins stick up from the board and the short pins go into the board to be soldered.

Install C32, yet another 10uF electrolytic capacitor.

Install R19, 470 ohm resistor (yellow-violet-brown). You’ll find it between J1 and J2.

Install H1, the other three pin header.

We’re in the home stretch now, just a few more parts to install. Take a break when you need to and then let’s get building again.

Install C1, 10uF electrolytic capacitor. Positive lead, “+” hole.

Install C31, 10uF electrolytic capacitor, and this is the last time you’ll have to hear about polarity and orientation. Refreshing, isn’t it?

Install R18, 470 ohms (yellow-violet-brown), between J2 and J3.

Jacks, pots, switches and we’re just about ready to fire up your headphone amp.

Starting at the left and working our way to the right, let’s install J4, one of the 3.5mm stereo jacks. This part and the rest of the jacks and switches will want to sit flatly and nicely on the PC board so that the kit fits well when you go to case it up and so that you don’t have trouble plugging things in, etc. Take your time and do it right, and we’re almost finished anyway so a few extra minutes here won’t cost you much but will pay off in the end.

In the same way, install J3, another 3.5mm stereo jack. Remember when headphone jacks were all 1/4”? Now they’ve all gone over to 3.5mm. Of course some of us remember those single ear, cream colored earphones you’d get with your transistor radio. Hmmm, kind of dating myself now, huh? Ok, let’s get back to building!

Locate the DPDT switch and install it in the S1 position. Happily, I have no

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Ramsey Electronics SHA2 manual
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SHA2 specifications

Ramsey Electronics SHA2 is a state-of-the-art digital transmitter designed for a wide range of applications, including DIY projects, short-range communication, and remote sensing. This powerful device allows users to transmit audio, data, and control signals wirelessly with outstanding clarity and reliability.

One of the standout features of the SHA2 is its transmission range, which can reach up to several hundred meters depending on the environment and conditions. This capability makes it an ideal choice for various applications, from hobbyist projects to more complex commercial uses. The SHA2 operates in the 2.4 GHz ISM band, which is a widely used frequency range that provides robust performance and minimal interference from other electronic devices.

The SHA2 incorporates advanced Frequency Hopping Spread Spectrum (FHSS) technology, enhancing its resilience against potential disruptions. By rapidly changing frequencies during transmission, FHSS minimizes the chance of interference and improves the overall signal integrity, ensuring a stable connection even in crowded environments. This feature is particularly beneficial for applications that require reliable and consistent data transmission.

Moreover, the SHA2 is equipped with powerful modulation schemes that support various encoding methods. As a result, users can transmit different types of signals, including analog audio, digital data, and even coded control signals. This versatility allows for creative approaches to problem-solving in diverse fields, such as automation, security systems, and wireless audio transmission.

In terms of user-friendly design, Ramsey Electronics has made the SHA2 easy to integrate into existing systems. Its compact size, along with clearly marked connection points, allows for streamlined installation. The module's low power consumption is another critical advantage, making it suitable for battery-operated devices and applications that prioritize energy efficiency.

The SHA2 is also compatible with various microcontrollers and development platforms, ensuring seamless connectivity regardless of the user's preferred technology. With its durable construction and excellent performance specifications, the Ramsey Electronics SHA2 stands out as a reliable choice for anyone looking to leverage wireless communication technology effectively. In summary, the SHA2 excels in transmission range, interference resistance, versatile signal encoding, user-friendly integration, and energy efficiency, making it a prime candidate for both hobbyists and professionals alike.
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