Search found 32 matches

by 1moldmaker
Thu Oct 25, 2018 10:48 am
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

Just wondering could this circuit be made with mosfets other than using the 2n3904's, and eliminating the tip127's I have some irf644 mosfets laying around, that way I could I go with a higher voltage with my light bulbs?
by 1moldmaker
Wed Oct 24, 2018 7:18 am
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

Thanks, do you think I can bread board this schematic using 2n3906 transistors, I would have to wait a week to get the tip127's
by 1moldmaker
Tue Oct 23, 2018 6:32 pm
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

its like you have to log in twice then you post a reply
by 1moldmaker
Tue Oct 23, 2018 3:39 pm
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

the light bulbs are14v at 0.22a, I thought the R3 resistor was for the other led.
by 1moldmaker
Tue Oct 23, 2018 1:41 pm
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

Well I kind of made some changes to the circuit, I took out the 1K resistors and I am using incandescent light bulbs in stead of LED's, also I am running the circuit at 12 to 14 volts, and I am using TIP122 darling transistors instead of 2n3904.
by 1moldmaker
Mon Oct 22, 2018 6:47 am
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

I found if I take out the 10K (R4) resistor the circuit works better, but the only problem that I have is when I turn the trim pot down to a lower resistance I burn up the trim pot. What I was thinking was putting a resistor parallel with the trim pot but I wouldn't know that resistance that I shoul...
by 1moldmaker
Mon Oct 15, 2018 7:11 pm
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

Thanks again
by 1moldmaker
Tue Oct 09, 2018 7:10 pm
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

Sorry I had it laid out wrong, the circuit works fine, I need to get a smaller pot, hoping to have the second light stay on a little longer after I disengage the switch, thanks
by 1moldmaker
Mon Oct 08, 2018 1:22 pm
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

I will try it again I will letyou know what I get
by 1moldmaker
Mon Oct 08, 2018 9:30 am
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

I had a 1 m pot that I pot in front of the 10k resistor, then I tried a 10k , 47k resistors, any thing larger than that the circuit wouldn't work or it would act funny.
by 1moldmaker
Mon Oct 08, 2018 7:50 am
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

I breadboard that circuit last weekend, and it didn't work, depending on the resistance that I would set on the pot, the second light would stay on for maybe a couple of seconds, to much resistance and both lights would turn on real dim, then once I would turn of the switch the the second light woul...
by 1moldmaker
Wed Oct 03, 2018 3:08 pm
Forum: General Discussion
Topic: How do I add an attachment
Replies: 11
Views: 488

Re: How do I add an attachment

I use google cloud
by 1moldmaker
Mon Oct 01, 2018 5:26 pm
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

Thanks again, I think you helped me on the this circuit before,
by 1moldmaker
Mon Oct 01, 2018 9:17 am
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

OK, The reason I thought that I needed to add a bigger capacitor is because when I changed it from a 22uf to a 10 uf capacitor the led stayed on for a 1/2 second .
by 1moldmaker
Mon Oct 01, 2018 5:52 am
Forum: General Discussion
Topic: Need help with a circuit again
Replies: 29
Views: 819

Re: Need help with a circuit again

thanks, here is a link to my circuit https://drive.google.com/file/d/1xk6dTF ... sp=sharing