Congratulations

You have just completed your DN1 NiCad battery conditioner unit. Take a well deserved break now. Give your eyes a rest. When you return, be sure to check over your work on the entire circuit board. Energizing the circuit board with solder “bridges” or misplaced components can damage your kit. Don’t throw away all your scrap component leads just yet, however, you’ll still need a couple to set up your kit for its final operation.

DOCTOR NiCad BATTERY CONDITIONER SETUP

Its time to configure your Doctor NiCad for your individual application. We’ll discuss a little theory first to more clearly understand the proper settings.

•NiCad batteries have a capacity rating, or “C” value, associated with them. This value is usually defined in an Ampere-Hour rating. Typically, the larger the battery cell, the larger the Amp·Hr rating.

•The quality of the NiCad is proportional to the charging rate of the battery. That's why you have seen the exact same “looking” batteries (i. e. same size, shape, and weight) while one is called a “fast charge” cell and may cost twice as much! Many portable motor driven devices like portable drills have higher capacity batteries for longer life. The higher the quality of the cell the faster one can charge it, as high as a rate of 4 times the capacity (4C) of the cell. Be aware, however. that trying to fast charge a cell not intended for this type of charge can cause the cell to build up internal gasses too quickly and explode, regardless of the complexity of the charger. If you cannot determine the proper charging rate for your cell, the rate of C/2 is recommended.

•Once the charging rate is determined, you can easily calculate the safety “time” out required for worry-free operation. This time is roughly 1½ times the charge capacity of the cells. This “time out” feature ensures that your batteries will not be charged for too long.

Here’s an example of how to determine the correct setup:

We have a battery pack consisting of 4 “AA” type cells. The pack is marked as having 500mA hr cells with a quick charge rate of 1 Amp.

With a charging rate of 1 Amp, the cell is storing charge at a rate of twice the capacity, or (2·C), The battery in an ideal situation will acquire a full charge in one-half hours time, or mathematically speaking, 1 A · .5Hr = .5A-Hr or 500mA-Hr. Notice in the Safety Time Out Jumpering Chart (page 17) that for a charge rate of 2C the time out will be 45 minutes.

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DN1 specifications

Ramsey Electronics DN1 is a versatile and compact digital audio transmitter that caters to a variety of audio transmission needs. It is designed for hobbyists, educators, and DIY enthusiasts looking to create their own wireless audio systems. The DN1 offers a reliable solution for transmitting audio signals over short distances without the clutter of wires.

One of the main features of the DN1 is its ability to transmit audio in the FM band, which provides clear sound quality and minimizes interference. The device operates at a frequency range of 88 to 108 MHz, allowing users to choose the optimal frequency for their specific environment. This adaptability makes it suitable for applications like personal broadcasting, classrooms, or small events.

The DN1 is equipped with a simple-to-use interface, featuring adjustable audio input levels and an LED indicator for power and modulation status. It supports both mono and stereo audio inputs, making it a flexible option for various audio sources. Users can connect the transmitter to devices such as audio players, microphones, or computers, which allows for seamless integration into existing setups.

Another significant characteristic of the DN1 is its compact and lightweight design, making it easy to transport and mount in different locations. Its robust construction ensures durability, making it ideal for both indoor and outdoor use. This makes the DN1 an excellent choice for users who need a portable solution for DIY projects or presentations.

The device operates on a low-power consumption model, which is not only environmentally friendly but also cost-effective. It can be powered by a standard 9V battery or an external power supply, adding to its convenience and versatility.

In terms of performance, the DN1 boasts a transmission range of several hundred feet in optimal conditions, ensuring that audio signals remain strong and consistent even in larger areas. This range, combined with its ease of use, makes it an appealing option for those looking to broadcast audio without the limitations of wired connections.

Overall, Ramsey Electronics DN1 stands out as an innovative transmitter that brings together user-friendly features, excellent audio quality, and practical design. Whether for personal use, educational purposes, or event hosting, the DN1 meets the demands of modern audio transmission needs, allowing users to experiment and expand their audio capabilities with ease.