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  1. CDRIVE

    LEDs in parallel don't consume sum of individual currents??

    Schematics usually clear up textual confusion. On another note many nubes don't factor in insertion loss (internal resistance) of an Ammeter and what effect it will have on the current being measured or voltage drops too. The more sensitive the meter range the more effect it has. Chris
  2. CDRIVE

    Help with sensing a stopped sprocket

    Wow, that was fast response! Imagine how different the world would be if it was that easy to tweak a contractors butt! :p Chris
  3. CDRIVE

    50-110V(5W) AC inverter from 5V power bank

    It's common practice for DIY'ers to use a 120VAC to 12VAC transformer reversed. IE the secondary becomes the primary. They're common with center taps (6VAC) too. Chris
  4. CDRIVE

    Automatic Irrigation System

    I like that. It includes a soil image embedded in the schematic! Chris
  5. CDRIVE

    Help with sensing a stopped sprocket

    Minder, this is just a Re-Minder. It's now tomorrow. :) Sorry, I couldn't resist! Chris
  6. CDRIVE

    problem with move in Eagle

    This is a weird post 1. It begins as though there were posts preceding it! :confused: Chris
  7. CDRIVE

    GPS NMEA, Failover Circuit upgrade attempt.

    Also make certain that Pin6 (-V) has the 1uF cap polarized properly. I know your schematic indicates Neg to pin6 and Pos to GND, which is correct but double check this. Chris
  8. CDRIVE

    Easy Machine To Wind Transformer

    Javier, you're very welcome. I navigated to Youtube because many times you can find good DIY vids there. Here's a coil winder that uses an electric hand drill motor and microcontroller. It features programmable winding count that slows the motor as it approaches the final turns. There are...
  9. CDRIVE

    GPS NMEA, Failover Circuit upgrade attempt.

    I totally agree that placing the + rail on top is good practice and makes it easier to follow. As far a circuit GND is concerned, I almost never draw a common rail, as I prefer individual GND symbols. I realize that some folks like to draw a common rail with a single GND symbol connected to it...
  10. CDRIVE

    GPS NMEA, Failover Circuit upgrade attempt.

    I looked back at your schematic and there's an error. C4 on pin2 should be going to GND. You have it connected to the +5V rail. Also, 0.1uF on the output pin of the regulator is too low. 4uF to 10uF is a better choice. You can leave the 0.1uF in there paralleled if you want. It's good practice...
  11. CDRIVE

    GPS NMEA, Failover Circuit upgrade attempt.

    Hi Constantine. What I was trying to covey is that something is miswired or supply voltages aren't correct. Prior to you receiving the MAX232 chip you had suspicions that there was something wrong with the Picaxe chip you have. I've never had a bad one. Now your new MAX232 is overheating...
  12. CDRIVE

    GPS NMEA, Failover Circuit upgrade attempt.

    Uh, I think that this thread (now 223 posts long) has seen way too many suspicions of "bad chips". I think you should be looking elsewhere for chip overheating. ... Just say'n! o_O Chris
  13. CDRIVE

    Easy Machine To Wind Transformer

    Javier, prior to retirement I spent most of my 45 year electronics career self employed. I had my ups and downs which happily ended with retirement on a very profitable up slope. During my struggling years I had more time than profits needed to purchase equipment and instruments I needed or...
  14. CDRIVE

    Automatic ranging current sensing

    Ah, always keeping that mind of yours sharply honed. ;) Chris
  15. CDRIVE

    Switching leds

    I didn't have a common anode (3 pin) Bi-Color LED in my library so when viewing this schematic assume the LED anodes are tied together within the oval. I've labeled the new parts with an asterisk (*). Parts that don't contain an asterisk already exist. Chris
  16. CDRIVE

    Can you help me with ideas for an Electronic Project

    Hello Connor and welcome to EP. Will you get extra points if this project is totally discrete? Chris
  17. CDRIVE

    Vintage doorbell issues

    At 3.7VDC your 6.4Ω coil is going to pull 0.469Amps. Series connected "D" cells would be a good choice at this current demand. "C" cells would work but with less longevity. If you choose to use the 3.7V rechargeable batteries you have they should be wired as shown in my schematic. I used 1N4002...
  18. CDRIVE

    Usb to 232 driver problem

    Gee, posts 1, 2 and 3 = problem fixed! They all should be this easy!:) Chris
  19. CDRIVE

    Easy Machine To Wind Transformer

    Javier, there's always China's Ebay where you can shop for gear motors, PWM speed control modules, foot pedals and counters...cheap! You could also convert an inexpensive Varispeed hand drill to be operated with a foot switch or speed control pot. They make a good starting point because the...
  20. CDRIVE

    Vintage doorbell issues

    I've emboldened the voltage rating of the bell and it certainly confirms my suspicions in my last post. That is an extremely odd voltage rating (very low) and confirms why those resistors are there. Sometime in its history someone probably used it with a 24VAC transformer. Back in the day you...
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