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91  Using Arduino / Project Guidance / Re: sort of delta robot/polygraph on: November 21, 2012, 03:57:16 pm
The tube being fixed at one end and the other end of the tube moves then the moving end becomes a point on a sphere.

Look into spherical to rectangular conversion.
92  Using Arduino / Installation & Troubleshooting / Re: Breadboard Arduino (ATMega328p) upload problems on: November 20, 2012, 07:50:01 pm
Don't know if a 1pf cap versus a .1uf (what your Pro Mini has on it) matters but the .1uf has an order of 100,000 times over the 1pf.

You might want to try and kick your cap up a bit. Just use a tpyical bypass cap.
93  Using Arduino / Project Guidance / Re: sending of spoofing FM signals to a RC car ? on: November 20, 2012, 05:06:21 pm
There probably is an "arming" sequence to allow the control of the motor. You don't want the car to take off as soon as you plug the power in.
94  Using Arduino / Installation & Troubleshooting / Re: Breadboard Arduino (ATMega328p) upload problems on: November 19, 2012, 10:39:36 pm
OK I'll throw out one more and I think this might be it (did a little looking at the pro mini).

On the pro mini it has the capacitor between the DTR and reset circuit. Take a look at the schematic for the pro mini.

Some people put the capacitor on the cp2102 end.

95  Using Arduino / Installation & Troubleshooting / Re: Breadboard Arduino (ATMega328p) upload problems on: November 19, 2012, 09:04:47 pm
OK I've done a little bit of trying stuff. I do have a CP2102 but it is a little old but I did get it to work (my settings page looks like yours). On looking at your model there was a thread about it (John was in the thread) and in that thread it was mentioned that the labeling was incorrect for the TX and RX (flipped). I don't know how you are hooking this up to your minis but I would stare really hard at how you have the TX and RX hooked up ( TX to RX and Rx to TX ) . Maybe a quick test is to hook up the TX line of the CP2102 thru a led -current limiting resistor-ground and see if there is activity on it when transmitting.

Here is that link:
96  Using Arduino / Installation & Troubleshooting / Re: Breadboard Arduino (ATMega328p) upload problems on: November 19, 2012, 07:17:08 pm
Just got back into the arduino and on one of the boards (from Evil Mad Scientist) I use a usb to rs232ttl for programming (had to add the capacitor to the rts line to form the rst).

It was giving me the same as you are getting ( I tried many times ). So I went into the device manager and found the device in Ports and right clicking on it brought up ... Properties. Clicked on Properties and selected Port Settings tab. Selected Adavanced and there were some options on how the port works. On mine the 'set rts on close' was checked so I unchecked it and closed the windows. Tried again and now it works. If I go back in to the device manager and recheck it I get the errors on trying to program. Unchecking  allows programming.

I'm using pre 1.x IDE . Don't know if this is adressable in the newer IDE's.
Hope this helps.
97  Using Arduino / Programming Questions / Re: Simulating a PLC ladder diagram on arduino on: November 18, 2012, 12:44:54 pm
Just thinking that this may have already been done in a way so a little googling came up with a few.

Here is one that looked OK.
98  Using Arduino / Motors, Mechanics, and Power / Re: Creating your own PWM to control a servo. on: November 16, 2012, 01:51:19 pm
  ? int servo = 14;

Have not looked at the pin def's for the tiny85 which is a 8 pin device but pin 14 sounds wrong.
99  Topics / Robotics / Re: Drawing bot - from the beginning (maybe again) on: November 12, 2012, 03:33:36 pm
I'm slowly getting a 3 axis mill going and came across an open source program for it. Take a look and see if it can be of any help to you.
100  Using Arduino / Project Guidance / Re: measuring the length sum of multiple workpieces on: November 11, 2012, 03:19:27 pm
When buying cabling or wire at the local they put the reel on a simple mechanism that feeds the wire thru a counter (maybe a pinch roller) that is resettable and it winds it onto a collapsable spool so when the length is attained it is easy to remove as a coil of wire.

So why not have some kind of the same type of counting mechanism but make it a digital  output.
101  Using Arduino / Sensors / Re: Counting teeth, and skipping pulses on: November 01, 2012, 04:35:09 pm
A long time ago they made rate multipliers (74167 is a decade one) . You could set the rate you wanted on the BCD pins and for every 10 clocks into it you could get out from 0-9 pulses. So all you would have to do is set it for 8 pulses and then for every 10 (5*2) you would get 8(4*2). The pulses would not be evenly distributed (jitter) but in your case it wouldn't matter.

In old nc machines this was a method for doing linear and circular interpolation without the need of a cpu.

I still have some in my junk drawer.
102  Using Arduino / Project Guidance / Re: What am I doing wrong here? Program to servo issue. on: September 17, 2012, 09:38:39 pm
9 volts might be pushing it for r/c servos but as usual make sure that ALL grounds are COMMON - servos,power supply arduino.
I like using a 4 battery holder to do servo stuff.
103  Using Arduino / Project Guidance / Re: Sensing absolute height on: September 15, 2012, 06:07:16 pm
I just did a google "rotating laser detector" and found this.

 Don't know what you would define as expensive. Sounds like it outputs different tones for homing in.
The hard part would be to keep it aiming at the rotating laser level as you move around. Compass driven perhaps.
104  Using Arduino / Project Guidance / Re: Servo timer on: September 14, 2012, 11:13:55 am
Maybe just use a piece of "muscle wire" to act on a mechanism that releases the cord that then puts the rudder into the spiral position.
105  Using Arduino / Motors, Mechanics, and Power / Re: Moving something linearly on an axis on: September 07, 2012, 07:06:19 pm
Take a look at what can be repurposed.
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