Voting resources, early voting, and poll worker information - VOTE. ... Adafruit is open and shipping.
0

*Resolved* Help with Monochron step "First Test".
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

*Resolved* Help with Monochron step "First Test".

by thebillhelm on Wed Mar 10, 2010 2:31 am

I'm in the process of building the Monochron clock. I've arrived at the first test step (voltage should read between 4.9 and 5.1). When I test the voltage, the voltage starts at around 7.75 and climbs steadily. I'm not sure what could be causing the problem. None of the solder joints appear to be shorted/cold soldered. Any ideas?
Last edited by thebillhelm on Wed Mar 10, 2010 11:37 pm, edited 1 time in total.
thebillhelm
 
Posts: 3
Joined: Wed Mar 10, 2010 2:28 am

Re: Help with Monochron step "First Test".

by ssquire on Wed Mar 10, 2010 1:54 pm

I would check/reflow the solder joints around the voltage regulator. Oh and since I've seen it said before, post pictures of both sides of the board.

Also, probe around the completed parts of the circuit for the voltage. It sounds like a capacitor is charging up to the input voltage (9V), does stop climbing when it gets there?

ssquire
 
Posts: 9
Joined: Mon Feb 01, 2010 7:26 pm

Re: Help with Monochron step "First Test".

by thebillhelm on Wed Mar 10, 2010 7:22 pm

Here is the front and back. As you might be able to tell, I'm a complete novice in the soldering department. Also, it does not stop at 9V.

Image
Image
thebillhelm
 
Posts: 3
Joined: Wed Mar 10, 2010 2:28 am

Re: Help with Monochron step "First Test".

by adafruit on Wed Mar 10, 2010 8:06 pm

check your multimeter battery

adafruit
 
Posts: 12151
Joined: Thu Apr 06, 2006 4:21 pm
Location: nyc

Re: Help with Monochron step "First Test".

by thebillhelm on Wed Mar 10, 2010 9:45 pm

adafruit wrote:check your multimeter battery


Absolutely stellar advice! I'm now getting a completely different, and somewhat consistent reading. It's now reading between 5.04 and 5.05. You've certainly made my week. Thank you very much.
thebillhelm
 
Posts: 3
Joined: Wed Mar 10, 2010 2:28 am

Re: *Resolved* Help with Monochron step "First Test".

by adafruit on Wed Mar 10, 2010 11:44 pm

good work! now you can continue :)

adafruit
 
Posts: 12151
Joined: Thu Apr 06, 2006 4:21 pm
Location: nyc

Please be positive and constructive with your questions and comments.