Need help with component selection in a circuit.
Need help with component selection in a circuit.
(OP)
Please view the attached circuit diagram. It is from a project I worked on several years ago and I have forgotten most everything about it since then (plus I was never really good with circuit design). I am working on a timing circuit whereby I control the pulse of an electromagnet with the use of an IR emitter/detector and a potentiometer. What I need to know is what specific components (PN & spec?)I need for my specific circuit for the following components: power transistor and D3.
Also, this is a really beginner question but... what voltage capacitors would be required for this particular circuit.
I know these are very basic questions but I had lots of help when designing this circuit originally and have fallen far out of contact with those that have helped me. Any help is appreciated. The following (3) links are the circuit diagram and (2) photos I found of the actual circuit.
http:/ /i276.phot obucket.co m/albums/k k19/Igidy/ timing.jpg
http://i 276.photob ucket.com/ albums/kk1 9/Igidy/IM G_1152.jpg
http://i 276.photob ucket.com/ albums/kk1 9/Igidy/IM G_1150.jpg
Thanks in advance for any help.
Also, this is a really beginner question but... what voltage capacitors would be required for this particular circuit.
I know these are very basic questions but I had lots of help when designing this circuit originally and have fallen far out of contact with those that have helped me. Any help is appreciated. The following (3) links are the circuit diagram and (2) photos I found of the actual circuit.
http:/
http://i
http://i
Thanks in advance for any help.





RE: Need help with component selection in a circuit.
If optimum cost or performance isn't an issue, you can use any low voltage medium power NPN transistor.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Need help with component selection in a circuit.
RE: Need help with component selection in a circuit.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Need help with component selection in a circuit.