Circuit Diagram

WINDSCREEN LOOP AERIAL

Published:2013/5/7 21:12:00 Author:muriel | Keyword: WINDSCREEN LOOP AERIAL

If you do not like the whip antenna on your car, you may try this alternative circuit. A one-turn loop is installed in the windscreen of the car, keeping possibly away from the metal structure of the car. This loop is terminated in a 6.5mm ring core suitable for VHF use. MW and LW are gathered for by the other coil taken from an old MW radio. This is the oscillator coil of the receiver with all capacitors removed and with the slug fully in. Performance depends very much on the components used. In most cases there was no difference compared with a whip antenna although an improvement was found when traveling in tunnels.   (View)

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ELECTRONIC I CHING

Published:2013/5/7 21:12:00 Author:muriel | Keyword: ELECTRONIC I CHING

This circuit is the electronic emulation of the I Ching, a form of divination originating in China. In the classical form, the response is obtained by the manipulation of 50 sticks or, more practically, by tossing 3 coins. The process must be repeated 6 times in order to complete what is called an hexagram. The various combinations given by the 6 readings are then read with the help of a book: the I Ching in fact or book of changes, used as a guide for the interpretation of the results. As the hexagrams look very much like a binary code, with additions and subtractions to go from one hexagram to the other, I thought that a hardware implementation could be feasible. The circuit reflects faithfully the chances of the I Ching: it is based on a counter which repeats a certain sequence, like a wheel. You may stop this rotation and read the counter status. In order to operate it you have to power it on and push wait , the yellow LED will be on and all other LEDs will be off. After a short while push read , the yellow LED will go off and the other LEDs will be enabled and the information stored in the double counter will be displayed: either red 1 or red 2 will go on representing a YIN and YANG line respectively. The same line becomes a moving line if also the green LED is lit. This is the first line of the hexagram: repeat the process 6 times by pushing again wait and so on. The whole circuit uses 3 ICs: one double counter and two hex inverters MC14049B. Supply voltage can be anything between 3 and 9V.   (View)

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NOISE GENERATOR

Published:2013/5/7 21:11:00 Author:muriel | Keyword: NOISE GENERATOR

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Electronic Fuse for DC Short Circuit Protection

Published:2013/5/7 21:10:00 Author:muriel | Keyword: Electronic Fuse, DC Short, Circuit Protection

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Electronic Fuse 2

Published:2013/5/7 21:10:00 Author:muriel | Keyword: Electronic Fuse

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PULSE RELAY

Published:2013/5/7 21:09:00 Author:muriel | Keyword: PULSE RELAY

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ELECTRONIC FUSE

Published:2013/5/7 21:08:00 Author:muriel | Keyword: ELECTRONIC FUSE

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Electronic fish lure

Published:2013/5/7 21:07:00 Author:muriel | Keyword: Electronic fish lure

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Electronic dice

Published:2013/5/7 21:07:00 Author:muriel | Keyword: Electronic dice

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Electronic coin tosser

Published:2013/5/7 21:06:00 Author:muriel | Keyword: Electronic coin tosser

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LED or bulb switch off with a puff

Published:2013/5/7 21:05:00 Author:muriel | Keyword: LED or bulb , switch off, a puff

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Electrical Device Harvests Earthworms 2

Published:2013/5/7 21:04:00 Author:muriel | Keyword: Electrical Device , Harvests Earthworms

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Egg Timer 2

Published:2013/5/7 20:58:00 Author:muriel | Keyword: Egg Timer

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a balanced power supply for mixed analog-digitial circuits

Published:2013/5/7 20:52:00 Author:muriel | Keyword: balanced power supply, mixed analog-digitial circuits

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Cat Toy

Published:2013/5/7 20:40:00 Author:muriel | Keyword: Cat Toy

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AUTOMATIC CURTAIN CLOSER Circuits

Published:2013/5/7 20:38:00 Author:muriel | Keyword: AUTOMATIC CURTAIN CLOSER Circuits

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An SCA Adapter

Published:2013/5/7 20:36:00 Author:muriel | Keyword: SCA Adapter

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A Fish Caller

Published:2013/5/7 20:34:00 Author:muriel | Keyword: Fish Caller

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RS232 Dev Board

Published:2013/5/2 22:35:00 Author:muriel | Keyword: RS232 Dev Board

A simple RS232 example project that takes all the power it needs from the serial port. Use it to power your microcontroller and communicate between serial port and microcontroller. Takes advantage of the fact that pc serial ports will accept 0-5V rather than the RS232 standard of around negative 10V to positive 10V. Very convenient – no external power required! Note that you may use either a 5.1V zener or a 5V   (View)

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The AP-80 An Alternative Pixie

Published:2013/5/2 22:23:00 Author:muriel | Keyword: AP-80 An, Alternative Pixie

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