40M Cw Transmitter Circuit
Posted on Aug 16, 2012
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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 circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in...
A 7 MHz oscillator with a variable crystal oscillator (VXO) operates very stably, but it allows...
Having to use the infrared remote control, we will procure in addition to modulate the Nutchip...
This is the circuit of a 500 watt linear amplifier, based upon a design by Frits Geerligs,...
This relatively simple, inexpensive circuit requiring one trimming operation can multiply or...
ICl-c functions as a noninverting comparator, and ICl-a operates as an inverting comparator....
The ESR Meter is basically an AC Ohmmeter with special scales and protective circuitry. It...
The technology of range finding employs extensively in civil, industrial fields such as...
The circuit a series of Dual Power Supply, where the symmetrical ± 15V supply for linear...
Free-space optical (FSO) communication uses light as a medium to transmit data. We did...
The bi-directional sequencer uses a 4 bit binary up/down counter (CD4516) and two "1 of 8 line...
Here is the circuit diagram of a fuse that has an automatic status indicator. This circuit can be...
When starting with Arduino, one soon has much more Arduino boards then RS232 or even USB ports on...
The QCard Controller Single Board Computer ( SBC ) contains the Freescale 68HC11 microcontroller,...
This odd little amp was something I designed and built for a shootout at the European Triode...
a typical rf amplifier that is used in an AM radio receiver. In figure 2-19, the input circuit is...
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