There is an advantage in using continuously active PWM signals. The main reason is that the asynchronous frequencies of the PWM core and microcore can sometimes result in a forshortened PWM pulse. The Sevo reconizes this as a command for a new positions and twitches toward that position. This makes the motion somewhat jerky on the original uServo4 c
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ircuit. In this application the microcore is actually used as a quasi- bicore. The microcore outputs are connected through 4 diodes to give the equivalent of master / slave bicore waveformsbut withindividual control of the rising and falling phaseangles. Since that can be used for turning a conventional " bicore " walker (but not the uServo walker), this techniquemay be exploited in other walker applications as well. Normally the microcore generates 4 individual pulses from Nv 1 - Nv 4. The master / slave bicore waveforms are two ovelapping quadrature waveforms. The translatorsynthesizes the bicore waveforms in two parts using diodes D3 - D8 to OR the microcore outputs. During forward motion theoutput of Nv 1isnot used So when Nv 1 is active, the PWM pulses for both S1 and S2 are not influenced through diodes D3-8. and the PWM s generate thelongestpulses driving bothservos to CCW. When Nv 2 is activeit controls duration of the first half of the S1 CW position, Nv 3 sets the second half of CW forS1 and the first half of CW for S2. Nv 4 controls the second half of CW for S2. Ifthe outputs of Nv 1and Nv 3 can be alternately selected, that would provide a 180 degree phase shift of the PWM signals required to reverse the walker. The microcore to bicore diode networkalsopart ofthe reverse circuit to selectwhether the rear legs lead or lag by 90 degrees and therefore reverse the walker. The reverse circuit is a multiplexerto...
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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