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  1. CDRIVE

    Tilt and swivel antenna mount

    Post some photos of your antenna or a link to the model. Chris
  2. CDRIVE

    Need help with amplifying a light

    It just occurred to me that you didn't tell us what phone you're using. I would think that old Bell System (Western Electric) phones would have very different requirements than modern or third party telephones. Here's some interesting reading for you. http://www.sandman.com/ringvoltbul.html Chris
  3. CDRIVE

    Need help with amplifying a light

    Perhaps you should try it at family or friend's home that has a land-line. At least that way you can determine if your magic jack's (VOIP) ring signal or the device itself is the issue. Perhaps it's defective? Did you return it to Amazon yet? Chris
  4. CDRIVE

    Convert 15v turntable to 12v

    Did I read that some of our members are confused as to what 'exactly' our new member (bloodaxe) is trying to accomplish? If so this has never happened before! :p There are times I wish I were a psychic! Chris
  5. CDRIVE

    Need help with amplifying a light

    Please elaborate on "this did not work". It appears to be what you're looking for because it uses mains power to light the lamp. Chris
  6. CDRIVE

    so i got a new toy

    I don't navigate to the Members Lounge too often but I'm instituting a new rule for myself that I will gladly adhere to. Heretofore I pledge to be totally sh!t faced prior to entering. It wasn't until "Skynet" was mentioned that I realized that the T1000 wasn't a Cupola! :p Chris
  7. CDRIVE

    Building my own bench drill

    I'll be looking forward to it but it's unfortunate that you didn't take any pix of the failed vertical slide mechanism. It's difficult to comment on a mechanism we don't have visuals of. ;) Chris
  8. CDRIVE

    Building my own bench drill

    Miguel, welding (especially arc welding) will invariably warp metal to some extent. That's why if a machinist is working a project that requires welding he tries his best to leave required precision machining procedures subsequent to the welding. I don't know about everyone else following this...
  9. CDRIVE

    Pcb trace help

    Correction: Wiki describes USB as Half Duplex. https://en.wikipedia.org/wiki/USB Chris
  10. CDRIVE

    Pcb trace help

    Ed, are you sure of that pinout? I thought USB data lines are simplex Tx/Rx with differential data lines marked ... Pin2: Data - Pin3: Data + Chris
  11. CDRIVE

    Derivative of Sin wave function

    I'm a bit lost here because U1's output isn't connected to anything and your waveform looks like what was typically seen when injecting "Beat Frequency Markers" when viewing swept amplifiers and filters on a scope. I know I'm missing something. Chris
  12. CDRIVE

    Voltage Doubler problem

    I would think there are safer low voltage (source) methods to achieve the high DC voltage for xenon flash systems. Cheaper than finding a suitably small 1:1 120V transformer too. Chris
  13. CDRIVE

    Building my own bench drill

    Miguel, I'm still not certain what exactly your questions are but here's a tip. This is a series of "How To" printings published by Dave Gingery. http://gingerybooks.com/ He published all sorts of backyard, redneck, low budget how to's. One of his most famous endeavors was a machinist's lathe...
  14. CDRIVE

    Building my own bench drill

    Miguel, I'm not sure what your questions are but it's an interesting project. Can you post a picture of the back side with the teeth? Chris
  15. CDRIVE

    Beginner Question...

    There are quite a number of 12VDC and 24VDC solenoids available on Ebay that will fill your force and stroke requirements. Keep in mind that you'll be powering them from a wall pack, which can be a 12VDC or 24VDC model. A 24V solenoid will draw about 1/2 the amount of current that a 12V model...
  16. CDRIVE

    Beginner Question...

    You need to somehow measure how many ounces of pressure your switches need to depress them. Then measure the distance the switch needs to move forward to latch in the closed position. I think with that data we can select a proper push type solenoid. A pull type solenoid can be used but it would...
  17. CDRIVE

    Beginner Question...

    Here's one method of interfacing the solenoids to the uC's GPIO ports. Chris
  18. CDRIVE

    Beginner Question...

    Obviously that host selector steps through each host upon press of the momentary switch. The product also has 4 LEDs that indicate the currently selected USB host. It wouldn't be a big deal to write code that would output the correct number of switch press pulses that would be determined by...
  19. CDRIVE

    Beginner Question...

    Further searching produced this product. https://www.iogear.com/product/GUS404/ It appears to use a pig-tailed push button switch to switch between one of four USB Hosts connected to one USB Client device. If the switch is only switching a High / Low control voltage it will make your life much...
  20. CDRIVE

    Beginner Question...

    Searching further for a 100% solid state solution in the form of a Logic Gate had me a bit befuddled because I've never dealt with Differential I/O in the realm of logic blocks. Since USB uses Differential I/O that's what I searched for and landed on "On Semiconductors" Differential AND, NAND...
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