This page contains circuit diagrams and code for a walking robot I made using Mark Tilden`s nervous network along with my own tinkerings like the reverser and brain circuits. Construction is a bit odd, chips with pins bent flat with wirebits and parts in-the-air within about a 1. 2` by 1. 5` by 2` space with a gearmotor at either end, a cordless pho
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ne battery slung underneath and feelers made from guitar strings. The whole thing is about 4" long, not including feelers, with a leg-span about 3" spacing and width. It can climb about 1/2" and doesn`t do well on carpet. A little evolution. WALKER. TXT contains various two-motor walker circuits I devised. The first microcore I made (without motors) used a `245 chip for a motor driver, this walker never got made because my motors draw too much for it to power. The design that actually got made used transistor pairs to drive the motors. The circuit started out as a more-or-less stock micro-core circuit except for the transistors but I quickly realized the importance of being able to back up. The obvious solution would have been a relay to swap the wires on one of the motors, however 3 volt relays are kind of hard to find and relays in general are power hogs. I tried using an analog switch chip to swap the driver signals, but the 4016 chip has too high of an on-resistance to drive the drivers (bet a 4066 would have worked and the design would be very different right now). Then I thought, just make the pulse go backwards. I ended up using two 4016 chips each wired as a two-wire crossing circuit. This walker was pretty good and would back away from obstacles in its ways. [ Since this walker was made, I`ve discovered that stacked 74HC245 chips (or 74HCT245 as I used) work much better for motor drivers than complementary...
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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