Hey all, i have been up and down trying to figure out why this is happening to me! This is the stats:
- Small Signal Transistors NPN 30V 100mA HFE/8
- 1k resistor
- 10k resistor
- 12v SPDT relay
- 1N4004 400v 1a standard rectifier
I am modeling it after this schema:
**broken link removed**
**broken link removed**
Here is the picture of my board...
**broken link removed**
**broken link removed**
I supply the 12v to it & the 5v. I get the these values:
Emitter: 0v
Base: 0.75v
Collector: 1.39v
I'm using this transistor (Small Signal Transistors NPN 30V 100mA HFE/8):
SS8050CTA
Here the relay i am using (Automotive SPDT 12VDC AUTO RELAY):
http://pewa.panasonic.com/pcsd/product/pwr/pdf/mech_eng_js.pdf
What its doing is when I supply the 12v to one side of the relay it opens it up. I want it to open up once i add the 5v to the other side. I'm using an ATMEGA168 chip with the digital pin out for the 5v (but right now I'm just hooking it straight up to 5v). But for some reason its just opening without even the 5v being applied. And I'm getting those low volts from the base and collector and i have no idea why..
Any help would be greatly appreciated!
David
- Small Signal Transistors NPN 30V 100mA HFE/8
- 1k resistor
- 10k resistor
- 12v SPDT relay
- 1N4004 400v 1a standard rectifier
I am modeling it after this schema:
**broken link removed**
**broken link removed**
Here is the picture of my board...
**broken link removed**
**broken link removed**
I supply the 12v to it & the 5v. I get the these values:
Emitter: 0v
Base: 0.75v
Collector: 1.39v
I'm using this transistor (Small Signal Transistors NPN 30V 100mA HFE/8):
SS8050CTA
Here the relay i am using (Automotive SPDT 12VDC AUTO RELAY):
http://pewa.panasonic.com/pcsd/product/pwr/pdf/mech_eng_js.pdf
What its doing is when I supply the 12v to one side of the relay it opens it up. I want it to open up once i add the 5v to the other side. I'm using an ATMEGA168 chip with the digital pin out for the 5v (but right now I'm just hooking it straight up to 5v). But for some reason its just opening without even the 5v being applied. And I'm getting those low volts from the base and collector and i have no idea why..
Any help would be greatly appreciated!
David
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