Recent content by zeb

Bob, so I was out getting the parts to build this circuit and the guy at the store asked what wattage I needed for the 100 ohm resistor, and what current I needed for the diode. What do you recommend?

@ BOB: Why two diodes? Wouldn't the second one be the only one needed anyway? doesn't the current flow from the solenoid and need a path to ground? Why keep the other diode? An explanation of the flow of the electrons would be helpful. @ Fish: 15mA is a little too much for my comfort. If I were...

Thanks Fish for your suggestion. Unfortunately, I want to avoid changing the type of light. The location of this bulb requires a special mounting bracket that takes only this specific type of bulb. I believe this bulb comes in a few different wattages, but since it is alongside other bulbs...

Thanks Bob for your input. I have a few questions about your suggestion. 1) Why did you choose a 100 ohm resistor for R2? 2) How does the diode help with the spike? Why did you connect it back to the power supply? 3) Why did you use two transistors? 4) How did you calculate 12.6v...

The current circuit has no relay. The relay depicted in the red-dashed box is an example of what I want to add. As it is now, the "old circuit" has 14 pins... pin 1 is power input, pin 5 is power output to the solenoid, pins 12 and 14 are ground, and the other pins do other things. The solenoid...

I don't get it. The solenoid will not energize? That doesn't make sense. I would think that in either series or parallel both the solenoid and the relay would energize.

If the output that powers the solenoid is anything like the other two outputs, then a 200 mA draw from a relay would definitely be too much to add to the existing draw of the solenoid. output 1 (engage solenoid): current draw: unknown, threshold: unknown output 2 (engage motor - forward)...

does this help?

I have a circuit with a 13.8v DC output that powers a solenoid. I'm not sure what the current draw of the solenoid is, but it's probably not much. I would like to have a 3W light come on when the solenoid is energized. The problem is that the circuit is very old and is known to have very low...

That's perfect! Thanks! I was afraid to simplify the first part down to floor((n-1)/27), because of the rounding, but now that I look at it, it makes sense to use 27 because that is the vertical difference between the large blocks. And shifting the column portion of the equation to result in...

While I appreciate your help, I do not need to be insulted in the process. Most people frequent forums for assistance, not to give others the opportunity to exercise their arrogance and ... self-righteous condescension. I happen to enjoy a good challenge (which is why I'm building a Sudoku...

Thanks for your input. Unfortunately, I don't really need the row and column. I'm writing a web script, and I'm looking for the most efficient way of determining the block number. Obviously this scenario is very small, so I could write up some arrays and logic tests to find out which block a...

Thanks for your reply... I'm trying to figure out how to use the expression you wrote... Let's say I have the number 44, how do I get to the number 6 using the expression you wrote?

Here's a problem that I need help figuring out... imagine a 9x9 grid filled with the numbers 1-81 starting in the upper left corner and progressing left to right, top to bottom; like so: /--------------------------------------------\ | 1, 2, 3 | 4, 5, 6 | 7, 8, 9 | |...

I'll accept that. Like I originally said, I didn't want to get into a debate, I was just pointing out a different theory and (more specifically) the names of the involved planets. I would hardly call it an attempt at a summary. Because the tangibility of his theories was not what I was arguing...