This type of cable is a bit more complicated than the unbuffered one, although it is also fairly easy to construct. The cable most often used in this category is the so-called Wiggler cable. The Wiggler is a commercial cable sold by Macraigor Systems. With a list price of $150 USD they are not cheap. There is a schematic on the internet that is c
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ommonly accepted to be the equivalent of what`s inside a Wiggler cable. This schematic, by Alec, was drawn up for devices that implement a typical EJTAG header in devices based on the ADM5120 System-on-Chip, another design based on the MIPS32 architecture. The ADM5120 has support for EJTAG v2. 6, which does not support DMA transfers. Whereas an unbuffered cable can be constructed for maybe $5 USD or less, the parts for a Wiggler-type cable will cost a little more, perhaps in the $15 to $30 USD range. The advantage of a buffered cable is that it is not as constrained as to length and is more immune to noise and static, thus permitting a higher data transfer rate. This cable is fully compatible with Macraigor OCD Commander. The wire between DATA6 (pin 8 on the LPT DB-25) and ERROR (pin 15) is used to identify a presence of the Wiggler cable and required by some JTAG software (i. e. Macraigor). It may be omitted for Hairydairymaid debrick utility. Another consideration is that a buffered Wiggler-style cable requires a voltage source to operate. Usually +3. 3 volts is needed and is commonly referred to as Vcc (voltage common-collector is the traditional meaning of Vcc). The buffer IC may take a Vcc from the PC LPT also. The DATA7 pin may be used for this purposes, so Wiggler software should provide aclive "1" at this pin. Do not use this pin if your JTAG header provides Vcc. Do not change 74HC244 (High-speed CMOS) series with...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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