Sensor types

Expand Messages
• i need some ideas/schematics for sensors for my new bot....i want to have modular types that i can plug and swap to change the function of the bot. some i
Message 1 of 4 , Jul 31 8:12 PM
• 0 Attachment
i need some ideas/schematics for sensors for my new bot....i want to have modular types that i can plug and swap to change the function of the bot.
some i thought of so far are
hot/cold
light/dark
batt full/low
edge detect
tilt
proximity
and any other range by ir or emf
oh and naturally the default touch switches....but they're easy...lol

i need them to have high/low outputs to interface with the rest of the bot design

thanks Mike

i dont ask for much do i??   lol

----- Original Message -----
From: Jesse
Sent: Tuesday, July 31, 2007 8:14 PM
Subject: [beam] Re: how to find capacity of solar cell?

hello Bill. (ever seen the movie kill bill? JK)

hooking up you meter in series is a way to read current, but you must
remember that the load determines the current draw, well up to a max in
this case.(im an electrician and you arent dealing with live power
here)

a way to calculate(someone correct me if need be)the current produced
is to use I = E/R, which is current equals voltage divided by
resistance. the current will be small, say in the miliamp range. Step
one, measure the resistance of the solar cell. Step two, measure the
voltage. Step three, do some math: voltaged divided the resistance to
get the current. Step four, wish you had better solar cells hahahahaha

peace out

Jesse Meers
just build it!

--- In beam@yahoogroups. com, "Bill" <wjl82871@.. .> wrote:
>
> Hello,
>
> I have a few little solar cells laying around. I know how to find the
> voltage of the cell, but how do I find the amp output? Do I need to
> make some sort of load and then put the VMM in series with the
circuit?
>
> Thank you for your help and time!
>

• Good idea! To provide interchangable sensor modules you can normalize all sensor outputs to proportional voltage outputs which can be compared and then
Message 2 of 4 , Aug 1, 2007
• 0 Attachment
Good idea!

To provide interchangable sensor modules you can normalize all sensor
outputs to proportional voltage outputs which can be compared and
then generate an open or closed "switch" contact.

For example, use a series load resistor or potentiometer to condition
resistive sensors such as potentiometers, PDs, thermistors and LDRs
to generate a voltage output.

Next use an opamp to compare the sensor voltage output to a reference
voltage or to another sensor's output voltage. When a sensor output
is above a threshold or is greater than the output voltage of a
second sensor the comparator output goes high.

Each opamp output signal controls two 4066 type analog gates.
Finally, the analog gate I/O pins connect like simple switch contacts
to the rest of the robot control circuit to provide signal inversion,
change time constants, discharge delay capacitors, multiplex control
signals (for reversersing) or implement wired AND/OR logic gates.

These modules can be a complete subsystem that can be preconfigured
and plug interchangably into a protoboard or PCB.

Here is a suggested form factor and connector layout to make it
compatible with protoboard or a PCB. I assume standard through hole
components

Each sensor module should be 1"x 1" with two IC sockets for mounting
a LM358 and a CD4066 plus 4 resistors. External connections are made
two 8 pin connectors made from single inline rows of IC machine
sockets with 0.1 inch spacing between pins and positioned along the
top and bottom edges of the module with 0.9 inch spacing between
rows.

The top 8 pin connector is used to connect two passive or active
sensors and two threshold adjustment pots to the (+/-) inputs of the
dual opamps and also provides pins for Vcc and gnd. The bottom 8 pin
connector provides 4 independent 4066 switch contacts to be
connecteted to the main part of the control circuit.

This allows the module to be plugged into a proto board with the dual
8 pin machine sockets pins and the socket acting as female input
connetors or as feedthroughs for external sensors leads and internal
jumpers for the control output signals.

The module can be raised up above the protoboard to provide access to
the hidden contact strips underneath the module by stacking up
another pair of 8 pin machine sockets on the the two rows of
connector pins.

The module circuit does not have to be a standalone daughter board
but can also be integrated into the main circuit protoboard or PCB if
desired to interchangably accomodate a wide variety of sensors.

A standardized sensor subsystem would require more discussion and
consensus on the internal circuit and connector pin assigment. If a
common interface is agreed on, it may go some way to creating a line
of circuit modules that can be connected together to provide plug and
play capability.

wilf

--- In beam@yahoogroups.com, "Mike Robertson" <mikerobe@...> wrote:
>
> i need some ideas/schematics for sensors for my new bot....i want
to have modular types that i can plug and swap to change the function
of the bot.
> some i thought of so far are
> hot/cold
> light/dark
> batt full/low
> edge detect
> tilt
> proximity
> and any other range by ir or emf
> oh and naturally the default touch switches....but they're
easy...lol
>
> i need them to have high/low outputs to interface with the rest of
the bot design
>
> thanks Mike
>
> i dont ask for much do i?? lol
>
>
> ----- Original Message -----
> From: Jesse
> To: beam@yahoogroups.com
> Sent: Tuesday, July 31, 2007 8:14 PM
> Subject: [beam] Re: how to find capacity of solar cell?
>
>
> hello Bill. (ever seen the movie kill bill? JK)
>
> hooking up you meter in series is a way to read current, but you
must
> remember that the load determines the current draw, well up to a
max in
> this case.(im an electrician and you arent dealing with live
power
> here)
>
> a way to calculate(someone correct me if need be)the current
produced
> is to use I = E/R, which is current equals voltage divided by
> resistance. the current will be small, say in the miliamp range.
Step
> one, measure the resistance of the solar cell. Step two, measure
the
> voltage. Step three, do some math: voltaged divided the
resistance to
> get the current. Step four, wish you had better solar cells
hahahahaha
>
> peace out
>
> Jesse Meers
> just build it!
>
> --- In beam@yahoogroups.com, "Bill" <wjl82871@> wrote:
> >
> > Hello,
> >
> > I have a few little solar cells laying around. I know how to
find the
> > voltage of the cell, but how do I find the amp output? Do I
need to
> > make some sort of load and then put the VMM in series with the
> circuit?
> >
> > Thank you for your help and time!
> >
>
• ok.... how bout i start with temp sensor could we use a comparator with a volage divider to set the referance on the negative and a lm335z on the positive or
Message 3 of 4 , Aug 1, 2007
• 0 Attachment
ok....
could we use a comparator with a volage divider to set the referance on the negative and a lm335z on the positive

or would a window compartor connected to a flip flop work better...at least with the flip flop you can easily select if you want a high or low output to trigger the bots function
if that works then simply changing the sensor type and divider should work for different detection types

mike
----- Original Message -----
From: wilf_nv
Sent: Wednesday, August 01, 2007 12:12 PM
Subject: [beam] Re: Sensor types

Good idea!

To provide interchangable sensor modules you can normalize all sensor
outputs to proportional voltage outputs which can be compared and
then generate an open or closed "switch" contact.

For example, use a series load resistor or potentiometer to condition
resistive sensors such as potentiometers, PDs, thermistors and LDRs
to generate a voltage output.

Next use an opamp to compare the sensor voltage output to a reference
voltage or to another sensor's output voltage. When a sensor output
is above a threshold or is greater than the output voltage of a
second sensor the comparator output goes high.

Each opamp output signal controls two 4066 type analog gates.
Finally, the analog gate I/O pins connect like simple switch contacts
to the rest of the robot control circuit to provide signal inversion,
change time constants, discharge delay capacitors, multiplex control
signals (for reversersing) or implement wired AND/OR logic gates.

These modules can be a complete subsystem that can be preconfigured
and plug interchangably into a protoboard or PCB.

Here is a suggested form factor and connector layout to make it
compatible with protoboard or a PCB. I assume standard through hole
components

Each sensor module should be 1"x 1" with two IC sockets for mounting
a LM358 and a CD4066 plus 4 resistors. External connections are made
two 8 pin connectors made from single inline rows of IC machine
sockets with 0.1 inch spacing between pins and positioned along the
top and bottom edges of the module with 0.9 inch spacing between
rows.

The top 8 pin connector is used to connect two passive or active
sensors and two threshold adjustment pots to the (+/-) inputs of the
dual opamps and also provides pins for Vcc and gnd. The bottom 8 pin
connector provides 4 independent 4066 switch contacts to be
connecteted to the main part of the control circuit.

This allows the module to be plugged into a proto board with the dual
8 pin machine sockets pins and the socket acting as female input
connetors or as feedthroughs for external sensors leads and internal
jumpers for the control output signals.

The module can be raised up above the protoboard to provide access to
the hidden contact strips underneath the module by stacking up
another pair of 8 pin machine sockets on the the two rows of
connector pins.

The module circuit does not have to be a standalone daughter board
but can also be integrated into the main circuit protoboard or PCB if
desired to interchangably accomodate a wide variety of sensors.

A standardized sensor subsystem would require more discussion and
consensus on the internal circuit and connector pin assigment. If a
common interface is agreed on, it may go some way to creating a line
of circuit modules that can be connected together to provide plug and
play capability.

wilf

--- In beam@yahoogroups. com, "Mike Robertson" <mikerobe@.. .> wrote:
>
> i need some ideas/schematics for sensors for my new bot....i want
to have modular types that i can plug and swap to change the function
of the bot.
> some i thought of so far are
> hot/cold
> light/dark
> batt full/low
> edge detect
> tilt
> proximity
> and any other range by ir or emf
> oh and naturally the default touch switches.... but they're
easy...lol
>
> i need them to have high/low outputs to interface with the rest of
the bot design
>
> thanks Mike
>
> i dont ask for much do i?? lol
>
>
> ----- Original Message -----
> From: Jesse
> To: beam@yahoogroups. com
> Sent: Tuesday, July 31, 2007 8:14 PM
> Subject: [beam] Re: how to find capacity of solar cell?
>
>
> hello Bill. (ever seen the movie kill bill? JK)
>
> hooking up you meter in series is a way to read current, but you
must
> remember that the load determines the current draw, well up to a
max in
> this case.(im an electrician and you arent dealing with live
power
> here)
>
> a way to calculate(someone correct me if need be)the current
produced
> is to use I = E/R, which is current equals voltage divided by
> resistance. the current will be small, say in the miliamp range.
Step
> one, measure the resistance of the solar cell. Step two, measure
the
> voltage. Step three, do some math: voltaged divided the
resistance to
> get the current. Step four, wish you had better solar cells
hahahahaha
>
> peace out
>
> Jesse Meers
> just build it!
>
> --- In beam@yahoogroups. com, "Bill" <wjl82871@> wrote:
> >
> > Hello,
> >
> > I have a few little solar cells laying around. I know how to
find the
> > voltage of the cell, but how do I find the amp output? Do I
need to
> > make some sort of load and then put the VMM in series with the
> circuit?
> >
> > Thank you for your help and time!
> >
>

• Good example of the difficulty of reaching consensus on standards. It is all a matter of defining the organization a complex system into meaningful layers or
Message 4 of 4 , Aug 3, 2007
• 0 Attachment
Good example of the difficulty of reaching consensus on standards.

It is all a matter of defining the organization a complex system into
meaningful layers or subsystems.

In biological systems this is incredibly difficult just think of how
long it took to get to the current understanding of the organization
of biological functions of the human body and this knowledge is still
only the tip of the iceberg of how it actually functions.

Because BEAM systems are so simple it should be possible to do a
useful definition of the organization of subsystems on which many of
these simple autonomous electromechanical designs are based.

Flip flops, delays or memories should probably be considered part of
a deeper part of the control circuit. However you can broaden the
sensor subsystem definition to include these functions or define a
separate sensor processing or "signal conditioning" layer as distinct
from the motor control layer.

Perhaps a diagram that follows the signal flow will describe the
model I am using.

REALWORLD->SENSORS->SIGNALCONDITIONING->WORLDMODEL->CPG->MOTORS-
>REALWORLD

wilf

--- In beam@yahoogroups.com, "Mike Robertson" <mikerobe@...> wrote:
>
> ok....
> could we use a comparator with a volage divider to set the
referance on the negative and a lm335z on the positive
>
> or would a window compartor connected to a flip flop work
better...at least with the flip flop you can easily select if you
want a high or low output to trigger the bots function
> if that works then simply changing the sensor type and divider
should work for different detection types
>
> mike
> ----- Original Message -----
> From: wilf_nv
> To: beam@yahoogroups.com
> Sent: Wednesday, August 01, 2007 12:12 PM
> Subject: [beam] Re: Sensor types
>
>
> Good idea!
>
> To provide interchangable sensor modules you can normalize all
sensor
> outputs to proportional voltage outputs which can be compared and
> then generate an open or closed "switch" contact.
>
> For example, use a series load resistor or potentiometer to
condition
> resistive sensors such as potentiometers, PDs, thermistors and
LDRs
> to generate a voltage output.
>
> Next use an opamp to compare the sensor voltage output to a
reference
> voltage or to another sensor's output voltage. When a sensor
output
> is above a threshold or is greater than the output voltage of a
> second sensor the comparator output goes high.
>
> Each opamp output signal controls two 4066 type analog gates.
> Finally, the analog gate I/O pins connect like simple switch
contacts
> to the rest of the robot control circuit to provide signal
inversion,
> change time constants, discharge delay capacitors, multiplex
control
> signals (for reversersing) or implement wired AND/OR logic gates.
>
> These modules can be a complete subsystem that can be
preconfigured
> and plug interchangably into a protoboard or PCB.
>
> Here is a suggested form factor and connector layout to make it
> compatible with protoboard or a PCB. I assume standard through
hole
> components
>
> Each sensor module should be 1"x 1" with two IC sockets for
mounting
> a LM358 and a CD4066 plus 4 resistors. External connections are
> two 8 pin connectors made from single inline rows of IC machine
> sockets with 0.1 inch spacing between pins and positioned along
the
> top and bottom edges of the module with 0.9 inch spacing between
> rows.
>
> The top 8 pin connector is used to connect two passive or active
> sensors and two threshold adjustment pots to the (+/-) inputs of
the
> dual opamps and also provides pins for Vcc and gnd. The bottom 8
pin
> connector provides 4 independent 4066 switch contacts to be
> connecteted to the main part of the control circuit.
>
> This allows the module to be plugged into a proto board with the
dual
> 8 pin machine sockets pins and the socket acting as female input
> connetors or as feedthroughs for external sensors leads and
internal
> jumpers for the control output signals.
>
> The module can be raised up above the protoboard to provide
> the hidden contact strips underneath the module by stacking up
> another pair of 8 pin machine sockets on the the two rows of
> connector pins.
>
> The module circuit does not have to be a standalone daughter
board
> but can also be integrated into the main circuit protoboard or
PCB if
> desired to interchangably accomodate a wide variety of sensors.
>
> A standardized sensor subsystem would require more discussion and
> consensus on the internal circuit and connector pin assigment. If
a
> common interface is agreed on, it may go some way to creating a
line
> of circuit modules that can be connected together to provide plug
and
> play capability.
>
> wilf
>
> --- In beam@yahoogroups.com, "Mike Robertson" <mikerobe@> wrote:
> >
> > i need some ideas/schematics for sensors for my new bot....i
want
> to have modular types that i can plug and swap to change the
function
> of the bot.
> > some i thought of so far are
> > hot/cold
> > light/dark
> > batt full/low
> > edge detect
> > tilt
> > proximity
> > and any other range by ir or emf
> > oh and naturally the default touch switches....but they're
> easy...lol
> >
> > i need them to have high/low outputs to interface with the rest
of
> the bot design
> >
> > thanks Mike
> >
> > i dont ask for much do i?? lol
> >
> >
> > ----- Original Message -----
> > From: Jesse
> > To: beam@yahoogroups.com
> > Sent: Tuesday, July 31, 2007 8:14 PM
> > Subject: [beam] Re: how to find capacity of solar cell?
> >
> >
> > hello Bill. (ever seen the movie kill bill? JK)
> >
> > hooking up you meter in series is a way to read current, but
you
> must
> > remember that the load determines the current draw, well up to
a
> max in
> > this case.(im an electrician and you arent dealing with live
> power
> > here)
> >
> > a way to calculate(someone correct me if need be)the current
> produced
> > is to use I = E/R, which is current equals voltage divided by
> > resistance. the current will be small, say in the miliamp
range.
> Step
> > one, measure the resistance of the solar cell. Step two,
measure
> the
> > voltage. Step three, do some math: voltaged divided the
> resistance to
> > get the current. Step four, wish you had better solar cells
> hahahahaha
> >
> > peace out
> >
> > Jesse Meers
> > just build it!
> >
> > --- In beam@yahoogroups.com, "Bill" <wjl82871@> wrote:
> > >
> > > Hello,
> > >
> > > I have a few little solar cells laying around. I know how to
> find the
> > > voltage of the cell, but how do I find the amp output? Do I
> need to
> > > make some sort of load and then put the VMM in series with
the
> > circuit?
> > >
> > > Thank you for your help and time!
> > >
> >
>
Your message has been successfully submitted and would be delivered to recipients shortly.