Search found 53 matches

by 1moldmaker
Fri Dec 22, 2017 8:40 am
Forum: General Discussion
Topic: Need help with a circuit
Replies: 6
Views: 2596

Re: Need help with a circuit

Thanks for the response, sorry about getting back been real busy, I tried your suggestion an you were right, the switch is slow and it has a delay when it turns back on. Do you have any suggestions where I could find a Schmitt Trigger circuit,

Thanks
by 1moldmaker
Wed Dec 20, 2017 6:11 pm
Forum: General Discussion
Topic: Need help with a circuit
Replies: 6
Views: 2596

Need help with a circuit

I am a nubee to electronics, what I am trying to do is when I close the switch D1 will light up and it will turn off D2, but I want to is when I open the switch back up it will D1 will stay on for a couple of seconds then it will turn off and turn on D2 again, is this possible with this circuit? Tha...
by 1moldmaker
Sat Nov 15, 2014 9:21 am
Forum: General Discussion
Topic: Mini variable Inverter?
Replies: 20
Views: 4734

Re: Mini variable Inverter?

Yes it is an inductive load, also I have the power resistors on 8 inch heat sinks.
by 1moldmaker
Fri Nov 14, 2014 10:53 pm
Forum: General Discussion
Topic: Mini variable Inverter?
Replies: 20
Views: 4734

Re: Mini variable Inverter?

ADJ.GIF
This is the circuit that I am using now, how this works is R2 acts like a governor and R1 adjust the voltage, problem is the circuit is rather sensitive and I am either blowing out the 1n914 diodes or the darlington transistors. Also The darlington transistors get super hot I have them on a heat sink with a fan blowing on them.
ADJ.GIF (9.09 KiB) Viewed 907 times
by 1moldmaker
Thu Nov 13, 2014 8:23 pm
Forum: General Discussion
Topic: Mini variable Inverter?
Replies: 20
Views: 4734

Re: Mini variable Inverter?

What I was thinking of doing was using a variable dc power supply to control my voltage .
by 1moldmaker
Thu Nov 13, 2014 9:24 am
Forum: General Discussion
Topic: Mini variable Inverter?
Replies: 20
Views: 4734

Re: Mini variable Inverter?

24 volts is the max voltage, most likely I would be be using this at 3-16volts. Really don't want to go the Variac rout.
by 1moldmaker
Wed Nov 12, 2014 6:21 pm
Forum: General Discussion
Topic: Mini variable Inverter?
Replies: 20
Views: 4734

Re: Mini variable Inverter?

I was thinking about 5 amps at 24 volts tops
by 1moldmaker
Tue Nov 11, 2014 7:07 pm
Forum: General Discussion
Topic: Mini variable Inverter?
Replies: 20
Views: 4734

Mini variable Inverter?

Would this be possible, I would like to build a low voltage inverter that would go 0 to 24v ac. I was thinking if I made a variable dc power supply circuit then invert it to AC voltage. Basically My question is if I invert DC to AC would I have to use a step up or step down transformer, and what wou...