rebeltaz

squeeee?

d'oh! Seems they don't like Ghostery and/or AdBlock Plus. Disabling those allowed the service to be added to the cart. Thanks.

I finally desined a board that I need more than one of and I thought I'd give Elecrow a try. When I tried to add the 5-pc 10cmx10cm board service to the cart, I got a Page Not Found error. So I tried to shoot them a message from their on-line support form and got the same error page. I was just wondering if anyone else has used them succefully recently or received the same error pages? Thanks guys

Well, now that's just too darn simple, isn't it? lol.. I will try that. Thank you.

Than you And yes... when the external power is cut, the coin cell takes over and the MSP ceases updating the display, while still maintaining the current time. So far, it seems to be working pretty well

@@enl -> ah... I gotcha now. Can I ask why use the transistor instead of a rectifier, though? Thanks

@@enl -> This is the circuit I am using in the rest of the clock to switch the common anode segment displays: It works, but I can't implement that with my idea of toggling positive and negative on the same pin. @@abecedarian -> I like that switch, but looking at the datasheet, it looks like I would still need to have it switch between two transistors (since it can't handle more than 50ma by itself or Vss (the switched voltage) higher than Vdd. And if I were to run Vdd high enough to allow switching of 12v, then I'd need to switch the input of the switch IC with another trans

I am trying to toggle a set of LEDs. I have two pins left available to use, but I would really rather not use both for this one feature if I can help it. I'd like to have a spare pin left over in case I need it later. What I am trying to do is to drive the MSP output positive to select one set of LEDs and negative to select the other set. Will this work without burning out the output pin? Or will the MSP even be able to pull the PNP base to ground far enough to turn it on? Usually, when switching PNP transistors with 12v on the emitter, I typically switch an NPN with the MSP and use that to br

Oh man... it's so cool that you said that! That actually was in my original design plans (lighting the sun or moon to show AM or PM) but since the plastic sheet is blue, I was afraid the the sun might shine green if I tried to illuminate it! I may try that later though. I also thought about adding stars using fiber optics. My projects are never finished so...

Thanks guys

Ok... so compared to some of the projects I see on here, I feel like amateur hour at the Apollo, but.... Here goes: I love building clocks, but I have no use for time itself. So a long time ago, I thought of doing this project. It wasn't until I fell in love with the MSP430 that I dusted it off and got to it. I call this piece "Beyond Time & Space." It is 12"x24" and every bit is custom built and hand painted. I would love to be able to post this to Etsy or something and sell a few, but with what I have in this, both in materials and time, I'd have to charge close to $600 for it a

In case anyone else would like to play around with really large displays, I found these - http://www.seeedstudio.com/depot/LED-Segment-c-34_78/?terms_id=216&ref=crumb - They sell 8", 5" and 3" displays for less than $10 each (only $3.50 for the 3" displays), but they are only in red and green. I guess you make make a Christmas countdown clock I did find the blue displays on eBay - http://www.ebay.com/itm/310610985717 - for only $35 for a set of five. Just thought I'd share that in case someone else might want a set for Christmas

lol... I know, right!? But it's just not the same... too....... modern, you know?

Holy cow! That link didn't work, but I did find that on their site and expensive is right! I found these - http://www.ebay.com/itm/310610985717 - but I'm not sure the brightness of them yet. I've got an email in to the seller, but... if anyone knows of anywhere else... I'm still shopping. Thanks!

On another topic, does any one have any idea where to get 3.5-4" bright blue LED 7-segment displays? The ones that I built for my clock are nice and I think they are going to work, but I would really like to offer the clock for sale and it is a PAIN to create these displays on a larger quantity scale, you know? Thanks....

I just wanted to let everyone know, in case any one else runs into this, that I got this working. I removed R23 from the circuit, left D2 as a 1n4148 and replaced D1 with an unknown rectifier that I found in my junk box with a voltage drop of about .168v. I also modified the code to incorporate a power good line to disable scanning if the main power is lost. Works great! Thanks for all y'alls help!

I haven't tried replacing the MSP, but I will try that as well as the other suggestions this weekend. No time off until Thursday Thanks guys! I will keep y'all posted...

I actually had thought about detecting power down and disabling the scan, but I wasn't sure how much current that would save. I may try that. For some reason, tonight I was able to get the msp to run using two AA batteries in place of the cr2032 and jumping the resistor out completely. Then for some unknown reason, the msp actually ran on the cr2032 when I went back to that, but I think all of this testing has drained it because it kept dipping below 1.8v so I need to replace that, but... I have another question. How far below the main power supply does the battery voltage have to be t

Well, I did connect the battery directly to the junction of D1 and D2, bypassing R23 and D2 and it still won't run the processor, so... Backtracking one step at a time is usually how I track down idiosyncrasies, but in this case, it just is not making logical sense and there is no where to back track from since I can't get the processor to run off the battery at all.

The 5v line is between 47 and 49mA under AC power and 0 under battery power.

Total or on the 3.3v line? The total current draw is right at about 200mA. The 3.3v line goes from about 2 to about 7mA.

sigh.... this doesn't make any sense. I disconnected the 78L33 from D1, plugged the 12v AC adapter in and powered the MSP from the battery. Nothing... well, maybe a VERY dim flicker of a couple of the LEDs. What is REALLY odd are the voltages. Powering the circuit with 78L33, voltage on the 3.3v line (Vss and RST) is 2.6-2.7v. Unplug the AC adapter and measure the battery voltage on the 3.3v line I get 2.0-2.1v. Now that SHOULD be enough to power the processor, but that is not the odd part. If I jump out the 1.5k resistor (R23- I know it says 10 ohm in the schematic I posted, but that was

I'm only running this at 1MHz. I thought that the battery would be low enough, too, but without the resistor, it's only like 0.05-0.1v below the supply voltage and I didn't think that that was low enough. I even tried adding a 470uf capacitor across the supply pins on the MSP (pins 1 and 20) as well as a 470uF capacitor across the reset pin and ground to help in case the transition wasn't quick enough. Still no good.

You mean disconnect the regulator and power the circuit up as normal, except with the battery powering the MSP in place of the 78L33? No.. I didn't try that. I just measured the voltage on pin1 (VCC) with and without the power supply plugged in. I can try that, though...