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this auction "Kit contains: PCB (Printed circuit board), 555timer chip, 8 pin IC socket 0.01uF ceramic Capacitor, 10uf electrolytic capacitor, 10 kohm resistor, 8 ohm speaker, 9v. battery plug, crocodile plug.
This Concrete kit can be used for various applications. It is based on the well known 555timer IC (Integrated circuit), a very functional completed chip that is used mainly in timing circuits. 555timer IC can be used for two basic operations, the monostable operation and astable operation.
In the Astable mode the IC does not operate in a constant situation, but changes from one situation to another. This is characterized as square wave oscillation
The square wave is periodical, not sine waveform which has the form of successive vibrations with constant width and duration.
The width of the ideal square wave, it varies continuously between two concrete points in short time intervals (let’s say from 0 volts in 9 volts depending on the benefit). By operating in this way, an LED for example, can blink constantly with the same rythm. In our case, in a speaker it will produce sound “predetermined” by the operating frequency.
With a little imagination, using this simple oscillating sound/noise generator, fun devices can be created, as well as using various electrical contact materials/objects as frequency controllers.
Between the second and third position of “P” and one of the two connectors, a resistor or trimmer can be added, for less sensitivity on the connectors.
Changing the “C1” capacitor for a larger one (± 0.1uf) and at reception “P” adding a potentiometer (± 1Kohm), then the producer can use other instruments with greater control – analog diy synth, some modified game (circuit bent), or use it as an autonomous signal generator ++.
Replacing the potentiometer with a photo resistor in place of “P” (2 & 3), the frequency of the oscillator can be controled from a short distance. Hiding the environment light from the photo resistor or lighting it with a torch, a type “Opto theremin” can be created.
Between the battery and the PCB (printed circuit board) a switch or button can be added or even both!
The output to the speaker can be connected on amplification, eg. to the input of an audio mixer, home sound system, computer speakers, effects, etc.
For more information about the 555 timer and circuits you can check on the Internet. Is very widespread and can be found on many web pages." Also see
www.mocm.grThe 555 timer pcb kit assemble.mp4
YouTube Uploaded by TheMOCM on Jun 22, 2011
previously posted"MOCM 555 TIMER KIT -
www.mocm.grOne simple, funny and creative electronic project, hat can change daily objects in to musical instruments. In other wards, a simple square wave oscillator. a sound generator."
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3. "Sequencer Glide" On/Of (SWITCH on back of unit)
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- LED per step
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Rather than leaving the Footswitch Input to waste on the Original Sync-Lock we decided it could be put to better use.
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This Godwin Organ works perfectly, and includes the original case and power supply/volume pedal, both in excellent condition.Cosmetically, the only flaw that is anything more than extremely minor is the little craquelure in the paint around the 1/4" jack. It is remarkably and convincingly Hammond-like when fed into a Leslie. The "impossible to find original schematics" are also included. Basically, the drawbar logic of a Hammond organ is incorporated into this guitar, except here the drawbars are rotary knobs, and each drawbar can be switched in or out. You can add or subtract as much "percussion" or tremolo as desired, You can also adjust the speed of the tremolo with fast/slow controls. The history of the Godwin Guitar Organ is that during the 1970s, Sisme, the Italian owner of Godwin Organs, aimed to attract guitarists with the ambitious Guitar-Organ. It looked impressive, with a bast array of controls, and was big on body dimensions, necessary to accommodate the copious electronics. As with the ill-fated Vox organ, frets were wired to tone generators and string completed the "circuit", creating the organ sound. Truly amazing, and truly rare. Don't miss this opportunity."
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The Wood Winds: Clarinet, Flute, Telstar, Song Whistle
