Diode test and identify

Started by Steve Wolf in sci.electronics.basics3 years ago 8 replies

trying to fix AC/DC power plug. I have a Diode that says: GW327 SR560 I THINK this is a Schottkty Diode. Setting meter to Diode test,...

trying to fix AC/DC power plug. I have a Diode that says: GW327 SR560 I THINK this is a Schottkty Diode. Setting meter to Diode test, Im getting, 1.71 Forward and Reverse .171. Normally on diode I know you should get 1 on reverse Are these readings allowable or is the Diode Bad. Thanks.


Diode Lead Length

Started by Anand P. Paralkar in sci.electronics.basics10 years ago 9 replies

Hi, I would like to use the 1N5283 diode in a certain application. Like some other applications in power electronics, this diode datasheet...

Hi, I would like to use the 1N5283 diode in a certain application. Like some other applications in power electronics, this diode datasheet too mentions a certain Lead Length to be maintained. (See http://www.datasheetcatalog.org/datasheet/motorola/1N5298.pdf) Could someone please explain this? Why does this distance have to be maintained? (Its got to do with the thermal character...


the fable of the diode

Started by RichD in sci.electronics.basics1 year ago

Once upon a time, there was a village called Diode. The inhabitants were an excitable lot, who tended to get charged easily, positively or...

Once upon a time, there was a village called Diode. The inhabitants were an excitable lot, who tended to get charged easily, positively or negatively. They liked to play musical chairs. When a negative charge shifted to a higher seat, that was a current of -1. A positive moving down, was also -1. One day, there were 5 seats, filled with negatives. But Eddie Electron, in #5, had...


diode, rectifier dead?

Started by Anonymous in sci.electronics.basics15 years ago 12 replies

Can anyone confirm whether following microwave oven components are dead -diode hvr1x8019:tested with analog ohm meter-short both...

Can anyone confirm whether following microwave oven components are dead -diode hvr1x8019:tested with analog ohm meter-short both directions -rectifier 2x062h 8025:..open in both directions tnx


How to slow down RPM of miter saw?

Started by John Doe in sci.electronics.basics8 years ago 48 replies

The motor runs on standard USA 120 V 60 Hz, 14 A, at 5500 RPM. What's the easiest way to slow down the RPM? What about simply adding a...

The motor runs on standard USA 120 V 60 Hz, 14 A, at 5500 RPM. What's the easiest way to slow down the RPM? What about simply adding a diode in series on the power cord? Any advice, references, and links would be appreciated. Thanks.


DC relay coil

Started by Bob Engelhardt in sci.electronics.basics1 year ago 5 replies

I have a DC relay with the coil connections marked "+" & "-". Does it matter? The relay operates with either polarity so there is no internal...

I have a DC relay with the coil connections marked "+" & "-". Does it matter? The relay operates with either polarity so there is no internal flyback diode. It's a 24v, 33ma coil for those who want to know. Thanks, Bob


Why dont they make a "Light Emitting TRIODE"

Started by Anonymous in sci.electronics.basics8 years ago 14 replies

The LED ("Light Emitting DIODE") is common place now. In fact it seems like they went from being simple "power on" indicator lamps to...

The LED ("Light Emitting DIODE") is common place now. In fact it seems like they went from being simple "power on" indicator lamps to the lighting of the future for darn near everything. But what I dont understand is why they have never made a "Light Emitting TRIODE"? (LET). It seems there would be many advantages!


MCU reset during relay switches ON

Started by Niresh in sci.electronics.basics2 years ago 7 replies

Hi, Could any please suggest how to avoid MCU reset with voltage glitches/noise during relay switches ON. I have protected the relay coil with...

Hi, Could any please suggest how to avoid MCU reset with voltage glitches/noise during relay switches ON. I have protected the relay coil with free wheeling diode and MCU with 2x10uF parallel with 100nF near VDD of MCU and 1uF across RESET pin. Regards, NiK


Confirmation needed

Started by Bob Engelhardt in sci.electronics.basics1 year ago 5 replies

I'm going to make a 12v DC power supply with a linear reg. I will half-wave rectify 12v AC and have a smoothing cap. The load is only...

I'm going to make a 12v DC power supply with a linear reg. I will half-wave rectify 12v AC and have a smoothing cap. The load is only 10ma. So: 12v RMS is 17v peak, minus the diode drop of 0.7 is 16.3v peak. Using a 47uF cap, the ripple will be 3.5v p-p. So the min voltage into the regulator will be 16.3-3.5 = 12.8. Ripple calculated from Vpp = i/fC (.010/(60*47e-6). Am I missing ...


Developing a Circuit Simulator from Scratch

Started by Anonymous in sci.electronics.basics16 years ago 19 replies

Hi, Can anyone give me some directions on how to develop a circuit simulator from scratch. I need to develop a simple spice...

Hi, Can anyone give me some directions on how to develop a circuit simulator from scratch. I need to develop a simple spice compatible simulator,that can read in spice netlists. I will be using C++ to code the simulator. I need to support only simple R,L,C, diode and mosfet devices and DC,AC and transient analyses. I would be using the Ebbers - Moll models. The problem is that I could not ...


(accidentally) shorted a mosfet's drain and source

Started by Michael Darrett in sci.electronics.basics6 months ago 5 replies

For a project I noticed my Arduino PWM pump controller (basically just an Arduino, MOSFET, and protection diode) was behaving oddly, so I powered...

For a project I noticed my Arduino PWM pump controller (basically just an Arduino, MOSFET, and protection diode) was behaving oddly, so I powered the pump directly from the 12V power supply, turning it off and on as needed manually. I looked more closely at my breadboard, and noticed the drain and source were touching. The circuit had been running for a few minutes this way. Did I damage my...