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Projects => IC-based Overdrive => Topic started by: ohhmygod on October 06, 2008, 04:09:50 AM

Title: IC Pin 3 Voltage ???
Post by: ohhmygod on October 06, 2008, 04:09:50 AM

Hello,

I tried t o assemble the circuit as the tutorial. Everything is fine, except the voltage into pin 3 is amazingly low.
I got around 3 V into pin 3, for other pins they are normal. I dont know what is happening. Please help

Thank you.

Title: Re: IC Pin 3 Voltage ???
Post by: ohhmygod on October 07, 2008, 04:35:20 AM

My values:
VA =9.63V
VB= 4.76V

Battery:9.66V
Pin:
1 0V
2 4.49V
3 3.25V[!]
4 0V
5 0V
6 4.82V
7 9.64V
8 0V

I have checked the resistors values :-/
100 = brown black brown
22k = red red orange
470k = yellow violet yellow

Title: Re: IC Pin 3 Voltage ???
Post by: Zben3129 on October 07, 2008, 06:59:19 AM

Check the value of r2, should be 10k (brown black orange), and r1, should be 2.2m (red red green)



Zach

Title: Re: IC Pin 3 Voltage ???
Post by: ohhmygod on October 07, 2008, 09:57:23 PM

yep, r2 is brown black orange. r1 is red red green.