spacehonkey
New Member
aljamri said:As what i do always with my friends ( beggeners like you ) i'll ask basic questions.
Which transistor have you used ECG or NTE?
how do you know the transistor and IC pin numbers ?
What is written on the relay's package and (if any) on coil it self
do you have a multimeter ( to mesure volts and resistance )
Finaly, How have you connected the Diod D1 ( the white strip side has to be connected to +ve side of the supply)
Here is a list of all the components I'm using along with a link so you guys can tell me if I'm using the right stuff.
NPN Transistors (15-Pack)
https://www.radioshack.com/product/...&cp=2032058.2032230.2032279&parentPage=family
LM741CN Operational Amplifier (8-Pin Dip)
https://www.radioshack.com/product/...&cp=2032058.2032230.2032279&parentPage=family
10K-Ohm Horizontal-Style Trimmer
https://www.radioshack.com/product/...&cp=2032058.2032230.2032275&parentPage=family
1N4742A 1-Watt Zener Diode
https://www.radioshack.com/product/...D/Product+Type/Diodes&fbc=1&parentPage=family
12VDC/1A SPDT Micro Relay
https://www.radioshack.com/product/...Price/RSK/00000400/00000599&parentPage=family
I also bought a pack of LDRs I bought from RadioShack but it isn't listed on the their site. I have a cheap little meter but it does what I need it to. As far as the pin # on the parts I just refered to the picture on the back of the package it came in. The diode is contected with the line facing the + contact. I also shot it with the meter to make sure it wasn't allowing any current flow back through the diode.
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