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.
In addition to the above, look at the input voltage, If it's a single voltage (like the one in post #13,) or a narrow range, ie. 110-120VAC then it's most likely to be what you want.
But if it's a wide range, ie. 90-250VAC, then it'll be a smps type.
I would not use that particular transformer for this purpose.
Your link does go to multiple transformers, but I'm assuming that you're using the 50VA unit.
Now, I haven't looked at the full datasheet for the transformer, but the VA rating is for the entire transformer. Although it does have a...
Generally, the supply voltage is constant and the load draws whatever current it needs to do the work at hand.
You can supply a constant current, but then the supply voltage must vary to match the required power.
Generally, constant current supplies are really voltage supplies whose output...
The 78L905 has an input up to 30Volts, so wouldn't need a preregular.
That said, I often need to make 5V from higher rails. My typical preregular is an N-channel mosfet with a zener setting the gate voltage. As the mosfet takes effectively zero gate current, the +rail to gate resistor can be...
Be aware, LEDs come in a very wide range, even for parts that you might think of as being equivalent.
A quick search on DigiKey for Red, T-1 3/4 LEDs gave over 600 items.
- The forward voltage ranged from 1.6V to 14V, allthough anything above ~2.5V probably has an integrated resistor.
- The...
I think that this circuit is close to what you want. See the timing diagram for what the three LEDs will do.
Transistors Q1-Q3 are used to drive your LEDs better than what the CD4017 can do directly. Their collector pins are connected to the negative side of your LEDs. The actual value of...
Trying to troubleshoot a clocked logic circuit is like running the Boston marathon in snowshoes.
U2 Pin is an output and does not ned to be connected to anything unless you're using the signal that will be there. It's OK to connect it to your uC, but that pin must be set as an input so it...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
