T&L Publications

Hi Tony, I built my first pendulum with fishing line holding the magnet and it worked great. I then made a rigid arm pendulum like that shown in the second set of pictures in your article and also shown on your YouTube video. My arm doesn't swing nearly as high as yours. I'm curious how long your ri...

Allright everythings working correctly now except the Radio Shack sound board. The new sound board Radio Shack sells has surface mount components so I was unable to solder to R3 like the article says. I overcame this by removing the button and soldering to one of the traces for the pushbutton. I ben...

Vern-

I finally got the BUTTON command working in the code. Here's what I did:

Good news, the buttons good!! I checked it with this code:

Vern, I've been trying to do some troubleshooting with P0. Is there a way to check the value of P0 through the computer? I've checked the hardware and I see it go from 5 Vdc to 0 Vdc when I push the button. I would now like to check the logic level on the BS1 to see if it changes value with a button...

Vern, I stopped by Radio Shack on my way home and bought a 7805 Regulator I installed it and now have 5 Vdc at P0 and on the main distribution bus at the center of the perf board. My PBMD still just starts looping as described above when I plug it in. The code still seems to be blowing past the butt...

Yes I believe I did. This may have come about due to the difference in the BS1-OEM and the BS1-1C. I've wired this up as I understand the schematic and following the pics you posted. I'm using a 7.5Vdc wall wart from Parallax. I wired this into the screw terminal header and connected the positive an...

I actually checked this already when I started my troubleshooting session and found ~6.8V when not pressed and 0V when pressed.

Vern, Thanks for the quick response. :grin: After writing you yesterday I downloaded 'BASIC Stamp Syntax and Reference Manual' and did some research myself. I had convinced myself last night that the BUTTON command was the culprit to my problem. I also checked the voltage values at P0 with the butto...

Help Vern! I powered my PBMD today and programmed it. I was thrilled when it made some sound and blinked some LED's. But my happiness quickly disappeared when I realized something was wrong. When I plug in my PBMD it quickly blinks the Button LED and immediately makes the Zrrrrp sound. I think my sy...

Vern- I'm finally working on the final assembly of my Monster Detector and a question popped up. For the power supplied to the Button, Button LED, white LED's and Red/Green LED's did you run individual wire to the proto board or did you create a bus? I've scoured over the pictures attached to you ar...

Vern-

For the second speaker I bought an 8-Ohm mini speaker from Radio Shack, p/n 273-092. Can you adress my following questions?

1. Is the 2.2 uF capacitor ok to use with this?

2. Can you explain the purpose of this capacitor and how one goes about sizing it?

Thanks.

Vern- I have a question about your schematic. Is Vdd and RES hooked to anything? Are the numbers on the lines leading from Vdd and RES wire numbers? They seem to share the same numbers as the wires leading to speaker 1. I tried searching the Parallax site for an explanation of what Vdd and RES are u...

The sound module I bought from Radio Shack does have the resistors however they are now surface mount. I jumpered Gnd to R3 and the module did activate. Surface mount resistors are tiny little squares and don't look anything like the resistors shown in the pictures of the one Mr. Graner used.