Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
I do use optocoupler but when I short the grounds together, a high voltage (about 80V) propagates through the ground line and everything in the control circuit becomes 80V.
Let me tell you what I am trying to do: I am trying to control the light intensity of a standard AC light bulb by pwming a full wave rectified 220V AC. The control circuit has its own power supply and it produces pwm signal between 10V and 0V. A mosfet is connected in series with a light bulb...
Hi, I have a question about controlling power mosfets. Lets say I have some electronic circuit that is fed with a commercial switching mode power supply and I have a high voltage, full wave rectified AC signal (220V line). The ground of the electronic circuit and the diode bridge should be the...
Hi,
I am trying to build an ac light dimmer but there is one problem:
I checked the datasheet of the moc3021 and found more dimmer circuits on the internet but non of them tell the wattage of the resistors used. Here:
**broken link removed**
the guy uses 1k 0.25W resistor at the...
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