DK-1 type control box using the AC electromagnet closing circuit
Posted on Dec 11, 2010
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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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This LOGIC PULSER capable of delivering pulses of various compositions, to any type of circuit...
A wide rage auto turn OFF timer covering 1 minute to 20 hours in three ranges with S1. As soon as...
It's basically a photovore with a couple tactile sensors. It's rather complex but can give neat...
This circuit comes from U.S. Patent 3, 778,800, granted to BRK Electronics in Aurora, IL. The...
This circuit generates three supply voltages using a minimum of components. Diodes D2 and D3...
The sensing circuit consists of a 741 op amp set up as a voltage comparator, using a zener diode...
This variable-frequency, audio bandpass filter is built around two 741 op amps that are...
The HA7210 oscillator 10 combines with an IOL7642 quad CMOS op amp to produce a sleep-mode...
The output of the 4017 is 100% duty cycle. so that means if you have step one and step two on,...
These are two - easy to build - relay-based alarms. You can use them to protect your motorcycle -...
This circuit allows an ECG signal to be displayed on an oscilloscope. Opamps IC1a, b and d form...
The sound will a little 2W+2W just but enough with 6 sizes are inch 8ohm loudspeakers. as a...
The circuit is based on the PIC 16F877 microcontroller, see schematic in figure 4. The digital...
This HD TV UHF wideband amplifier (Ultra High Frequency amplifier ) has a total gain of 10 to 15...
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