Circuit Diagram

Basic Circuits For The LM555 Timer 2

Published:2013/5/16 2:03:00 Author:muriel | Keyword: LM555 Timer

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Basic Circuits For The LM555 Timer

Published:2013/5/16 2:03:00 Author:muriel | Keyword: LM555 Timer

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LM555 Astable Oscillator Circuit Diagram

Published:2013/5/16 2:03:00 Author:muriel | Keyword: LM555 , Astable Oscillator

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LM555 Monostable Oscillator Circuit Diagram

Published:2013/5/16 2:02:00 Author:muriel | Keyword: LM555, Monostable Oscillator

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RESET And CONTROL Terminal Notes

Published:2013/5/16 2:02:00 Author:muriel | Keyword: RESET And CONTROL Terminal Notes

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LM556 Timer Internal Circuit Block Diagram

Published:2013/5/16 2:01:00 Author:muriel | Keyword: LM556 , Timer Internal Circuit

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LM555 Timer Internal Circuit 2

Published:2013/5/16 2:01:00 Author:muriel | Keyword: LM555 , Timer Internal Circuit

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LM555 Timer Internal Circuit Block Diagram

Published:2013/5/16 2:00:00 Author:muriel | Keyword: LM555 Timer Internal Circuit

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1.5 Volt Power Supply - LM317

Published:2013/5/16 1:59:00 Author:muriel | Keyword: 1.5 Volt, Power Supply , LM317

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A Test Bench Power Supply

Published:2013/5/16 1:59:00 Author:muriel | Keyword: Test Bench Power Supply

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Fixed Voltage Regulators

Published:2013/5/16 1:58:00 Author:muriel | Keyword: Fixed Voltage Regulators

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Generally, plug-in transformers

Published:2013/5/16 1:58:00 Author:muriel | Keyword: Generally, plug-in transformers

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LM311 Comparator Controlled H-Bridge schematic

Published:2013/5/16 1:56:00 Author:muriel | Keyword: LM311 Comparator , Controlled H-Bridge schematic

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3Amp - DCC Booster Circuit

Published:2013/5/16 1:56:00 Author:muriel | Keyword: 3Amp, DCC Booster Circuit

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Low Voltage H-bridge 2

Published:2013/5/16 1:55:00 Author:muriel | Keyword: Low Voltage H-bridge

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Generating -5VDC from +5VDC

Published:2013/5/16 1:52:00 Author:muriel | Keyword: -5VDC from +5VDC

If you happen to have the March 1984 issue of Radio-Electronics, turn to page 78. This issue has the very first instalment of Robert Grossblatt's Designer's Notebook column. In it, he shows a simple circuit which will supply a negative voltage, given a positive voltage. It's basically a 555-based oscillator, and a voltage-doubling rectifier. He claims the negative-voltage output should be good for about 60ma. No-load voltage should be pretty close to the input voltage (but negative), although the voltage will drop a bit, depending on the load. If you put +5V into the circuit, it'll give you around -5V out. load. If you put +5V into the circuit, it'll give you around -5V out. If the load makes the voltage drop too low (-3V or -4V), you could always just feed the circuit with a higher voltage (like maybe 9V or 12V) and then just regulate the output down to -5V using a 7905 regulator. I've used this circuit a couple of times for powering op-amp's, and it works great! I'm not that great at ASCII-art, but I'll give it a shot. If the following schematic doesn't make sense, let me know, and I'll try it again...Note: In the above diagram , both diodes point down (the anodes are at the top). Also, watch the polarity of C1 & C3. The circuit is set up to oscillate at about 45kHz, with a duty cycle pretty close to 50%. None of the values of any of the parts are terribly critical, so if the capacitors or resistors are in the ballpark , it should still work okay.   (View)

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HV supply: 12VDC in, 12KV out

Published:2013/5/16 1:51:00 Author:muriel | Keyword: HV supply, 12VDC in, 12KV out

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smitt-trigger

Published:2013/5/16 1:51:00 Author:muriel | Keyword: smitt-trigger

This is a smitt-trigger (a circuit with hysterysis) which alternating charges and discharges a capacitor through a resistor. If the output voltage is low the upper led is lighted the current throug the led is limmited by the series resistor. If the output is high the lower led is lighted.   (View)

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RR LED flasher (alternating)

Published:2013/5/16 1:50:00 Author:muriel | Keyword: RR LED flasher

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Ultrasonic transducer oscillator circuit

Published:2013/5/16 1:50:00 Author:muriel | Keyword: Ultrasonic transducer oscillator circuit

Allows the transducer to oscillate at its self-resonating point, with no tedious setup. As far as I can tell, the circuit will run on 5V-9V.   (View)

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