Description:
Elementary questions about electronics.
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Inverter improvements?
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Hello, I have an inverter circuit, although I learn that hooking a load directly to its output is not working. I was not sure if I should use an opAmp or mosfet, I have the circuit below, any improvment? anybetter way to do it. The load I want to add is to drive a mosfet Yes some people will say not to use the same power supply on both... more »
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water level relay
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I thought this would be easy, but I'm struggling with the details. I have some lights (12VDC 200W) I want to turn on when the water level in a fountain reaches a certain point (i.e., the fountain is on). If I use a level switch and trigger a relay, I have the problem of figuring out where to put the relay around the fountain (just rocks... more »
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Building Your Own Flyback Transformer
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A friend gave me a little yellow toroid (ferrite?) with a winding around it, that he had butchered from some non-working computer part. I unwound the (thick!) wire, re-wound it with 10 turns of primary, and 50 turns of secondary. I then built an astable multivibrator switching at 70 kHz, running off... more »
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Compact Fluorescent Lamp
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When you turn the CFL on, It will take about 40 sec brighten fully , which make it very inconvenient to use. Can any members help me to explain this phenomenon ? Thank You. Regards
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Do Sock Puppets Count As Readership?
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If you get a lot of responses under different handles, all with nothing to say, is it any better than having zero readership of people with somethig to say? Bret Cahill
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Constructing a "delay" into a system?
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OK I can solder, and 50 years ago took an RCA Electronics course so I could fix b&w TV's. Since then, not too much electronical has happened around me! I now fly some lightweight, foam Radio Controlled airplanes Every now and then, due to "operator error"... I put one down in a cornfield or some other... more »
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Scope dilema
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I am looking to purchase my first oscilloscope use from eBay. I have seen many recommendations for the Tektronix 465 series of analog scopes. I have also seen several 100 Mhz Tektronix digital storage oscilloscopes such as the 2232 and 2236 for prices in my range. My interests are mostly in microcontrollers, but will be using some... more »
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