P
Piyush Kamdi
Guest
can anyone tell me the alternative of the IC LTC6992
S
server
Guest
On Tue, 19 Jul 2022 04:37:49 -0700 (PDT), Piyush Kamdi
<piyushkamdi21@gmail.com> wrote:
>can anyone tell me the alternative of the IC LTC6992
You could make something out of cheap parts... depends on your exact
needs.
<piyushkamdi21@gmail.com> wrote:
>can anyone tell me the alternative of the IC LTC6992
You could make something out of cheap parts... depends on your exact
needs.
P
Phil Hobbs
Guest
jlarkin@highlandsniptechnology.com wrote:
Yikes! $5 in onesies, $3 in reels for a glorified RC monostable?
Such as an NE556D dual timer, with one side being an astable and the
other side a monostable with a variable threshold. Ten cents in any
quantity, direct from TI.
<https://www.ti.com/product/NE556/part-details/NE556DR>
A bit more design is required, of course--you have to take account of
the tolerances of the chip and timing components, especially if you want
to get duty cycles near 0.
OTOH if the OP uses a resistor to a higher supply rail (and a diode to
V+ for protection), the ramp will linearize pretty well. Extra points
for using a BJT current source.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
Yikes! $5 in onesies, $3 in reels for a glorified RC monostable?
Such as an NE556D dual timer, with one side being an astable and the
other side a monostable with a variable threshold. Ten cents in any
quantity, direct from TI.
<https://www.ti.com/product/NE556/part-details/NE556DR>
A bit more design is required, of course--you have to take account of
the tolerances of the chip and timing components, especially if you want
to get duty cycles near 0.
OTOH if the OP uses a resistor to a higher supply rail (and a diode to
V+ for protection), the ramp will linearize pretty well. Extra points
for using a BJT current source.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
A
Anthony William Sloman
Guest
On Tuesday, July 19, 2022 at 9:37:53 PM UTC+10, piyush...@gmail.com wrote:
> can anyone tell me the alternative of the IC LTC6992
Single chip microcontrollers can do the same job. You need an internal clock that runs faster than 1MHz to get the same frequency range, but some run up to 100MHz and faster (though they tend to be bit greedy with supply current).
--
Bill Sloman, Sydney
> can anyone tell me the alternative of the IC LTC6992
Single chip microcontrollers can do the same job. You need an internal clock that runs faster than 1MHz to get the same frequency range, but some run up to 100MHz and faster (though they tend to be bit greedy with supply current).
--
Bill Sloman, Sydney
M
Mike Monett
Guest
Piyush Kamdi <piyushkamdi21@gmail.com> wrote:
> can anyone tell me the alternative of the IC LTC6992
Depends on what you want to do. Check Octopart:
https://octopart.com/search?q=Voltage-Controlled+Pulse+Width+Modulator
--
MRM
> can anyone tell me the alternative of the IC LTC6992
Depends on what you want to do. Check Octopart:
https://octopart.com/search?q=Voltage-Controlled+Pulse+Width+Modulator
--
MRM
S
server
Guest
On Tue, 19 Jul 2022 09:05:07 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
About the simplest voltage to duty cycle converter is a schmitt gate
oscillator and one added resistor. Real cheapskates can delete the
cap.
Fancier, use a dial opamp or comparator as a triangle oscillator +
comparator.
If Piyush can give us some details of the requirements, we could
design something with him. Group design is fun.
<pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
On Tue, 19 Jul 2022 04:37:49 -0700 (PDT), Piyush Kamdi
piyushkamdi21@gmail.com> wrote:
can anyone tell me the alternative of the IC LTC6992
Yikes! $5 in onesies, $3 in reels for a glorified RC monostable?
You could make something out of cheap parts... depends on your exact
needs.
Such as an NE556D dual timer, with one side being an astable and the
other side a monostable with a variable threshold. Ten cents in any
quantity, direct from TI.
https://www.ti.com/product/NE556/part-details/NE556DR
A bit more design is required, of course--you have to take account of
the tolerances of the chip and timing components, especially if you want
to get duty cycles near 0.
OTOH if the OP uses a resistor to a higher supply rail (and a diode to
V+ for protection), the ramp will linearize pretty well. Extra points
for using a BJT current source.
Cheers
Phil Hobbs
About the simplest voltage to duty cycle converter is a schmitt gate
oscillator and one added resistor. Real cheapskates can delete the
cap.
Fancier, use a dial opamp or comparator as a triangle oscillator +
comparator.
If Piyush can give us some details of the requirements, we could
design something with him. Group design is fun.
P
Phil Hobbs
Guest
jlarkin@highlandsniptechnology.com wrote:
Yeah, if the rep rate doesn\'t need to be constant you can do without a
lot of stuff. Simplifies the tolerances too.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
On Tue, 19 Jul 2022 09:05:07 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
On Tue, 19 Jul 2022 04:37:49 -0700 (PDT), Piyush Kamdi
piyushkamdi21@gmail.com> wrote:
can anyone tell me the alternative of the IC LTC6992
Yikes! $5 in onesies, $3 in reels for a glorified RC monostable?
You could make something out of cheap parts... depends on your exact
needs.
Such as an NE556D dual timer, with one side being an astable and the
other side a monostable with a variable threshold. Ten cents in any
quantity, direct from TI.
https://www.ti.com/product/NE556/part-details/NE556DR
A bit more design is required, of course--you have to take account of
the tolerances of the chip and timing components, especially if you want
to get duty cycles near 0.
OTOH if the OP uses a resistor to a higher supply rail (and a diode to
V+ for protection), the ramp will linearize pretty well. Extra points
for using a BJT current source.
Cheers
Phil Hobbs
About the simplest voltage to duty cycle converter is a schmitt gate
oscillator and one added resistor. Real cheapskates can delete the
cap.
Fancier, use a dial opamp or comparator as a triangle oscillator +
comparator.
If Piyush can give us some details of the requirements, we could
design something with him. Group design is fun.
Yeah, if the rep rate doesn\'t need to be constant you can do without a
lot of stuff. Simplifies the tolerances too.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
J
John Larkin
Guest
On Tue, 19 Jul 2022 14:26:01 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
Schmitt gate inverter, one resistor, one thermistor. It\'s a PWM
temperature controller!
<pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
On Tue, 19 Jul 2022 09:05:07 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
On Tue, 19 Jul 2022 04:37:49 -0700 (PDT), Piyush Kamdi
piyushkamdi21@gmail.com> wrote:
can anyone tell me the alternative of the IC LTC6992
Yikes! $5 in onesies, $3 in reels for a glorified RC monostable?
You could make something out of cheap parts... depends on your exact
needs.
Such as an NE556D dual timer, with one side being an astable and the
other side a monostable with a variable threshold. Ten cents in any
quantity, direct from TI.
https://www.ti.com/product/NE556/part-details/NE556DR
A bit more design is required, of course--you have to take account of
the tolerances of the chip and timing components, especially if you want
to get duty cycles near 0.
OTOH if the OP uses a resistor to a higher supply rail (and a diode to
V+ for protection), the ramp will linearize pretty well. Extra points
for using a BJT current source.
Cheers
Phil Hobbs
About the simplest voltage to duty cycle converter is a schmitt gate
oscillator and one added resistor. Real cheapskates can delete the
cap.
Fancier, use a dial opamp or comparator as a triangle oscillator +
comparator.
If Piyush can give us some details of the requirements, we could
design something with him. Group design is fun.
Yeah, if the rep rate doesn\'t need to be constant you can do without a
lot of stuff. Simplifies the tolerances too.
Cheers
Phil Hobbs
Schmitt gate inverter, one resistor, one thermistor. It\'s a PWM
temperature controller!
P
Phil Hobbs
Guest
John Larkin wrote:
For sufficiently permissive definitions of \'controller\'. ;0
(It would be fairly challenging without at least one other resistor for
heating, unless you\'re just trying to control the temperature of the
thermistor.)
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
On Tue, 19 Jul 2022 14:26:01 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
On Tue, 19 Jul 2022 09:05:07 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
On Tue, 19 Jul 2022 04:37:49 -0700 (PDT), Piyush Kamdi
piyushkamdi21@gmail.com> wrote:
can anyone tell me the alternative of the IC LTC6992
Yikes! $5 in onesies, $3 in reels for a glorified RC monostable?
You could make something out of cheap parts... depends on your exact
needs.
Such as an NE556D dual timer, with one side being an astable and the
other side a monostable with a variable threshold. Ten cents in any
quantity, direct from TI.
https://www.ti.com/product/NE556/part-details/NE556DR
A bit more design is required, of course--you have to take account of
the tolerances of the chip and timing components, especially if you want
to get duty cycles near 0.
OTOH if the OP uses a resistor to a higher supply rail (and a diode to
V+ for protection), the ramp will linearize pretty well. Extra points
for using a BJT current source.
Cheers
Phil Hobbs
About the simplest voltage to duty cycle converter is a schmitt gate
oscillator and one added resistor. Real cheapskates can delete the
cap.
Fancier, use a dial opamp or comparator as a triangle oscillator +
comparator.
If Piyush can give us some details of the requirements, we could
design something with him. Group design is fun.
Yeah, if the rep rate doesn\'t need to be constant you can do without a
lot of stuff. Simplifies the tolerances too.
Schmitt gate inverter, one resistor, one thermistor. It\'s a PWM
temperature controller!
For sufficiently permissive definitions of \'controller\'. ;0
(It would be fairly challenging without at least one other resistor for
heating, unless you\'re just trying to control the temperature of the
thermistor.)
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
J
John Larkin
Guest
On Tue, 19 Jul 2022 17:20:43 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
It would drive a mosfet or an SSR or something.
<pcdhSpamMeSenseless@electrooptical.net> wrote:
John Larkin wrote:
On Tue, 19 Jul 2022 14:26:01 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
On Tue, 19 Jul 2022 09:05:07 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:
jlarkin@highlandsniptechnology.com wrote:
On Tue, 19 Jul 2022 04:37:49 -0700 (PDT), Piyush Kamdi
piyushkamdi21@gmail.com> wrote:
can anyone tell me the alternative of the IC LTC6992
Yikes! $5 in onesies, $3 in reels for a glorified RC monostable?
You could make something out of cheap parts... depends on your exact
needs.
Such as an NE556D dual timer, with one side being an astable and the
other side a monostable with a variable threshold. Ten cents in any
quantity, direct from TI.
https://www.ti.com/product/NE556/part-details/NE556DR
A bit more design is required, of course--you have to take account of
the tolerances of the chip and timing components, especially if you want
to get duty cycles near 0.
OTOH if the OP uses a resistor to a higher supply rail (and a diode to
V+ for protection), the ramp will linearize pretty well. Extra points
for using a BJT current source.
Cheers
Phil Hobbs
About the simplest voltage to duty cycle converter is a schmitt gate
oscillator and one added resistor. Real cheapskates can delete the
cap.
Fancier, use a dial opamp or comparator as a triangle oscillator +
comparator.
If Piyush can give us some details of the requirements, we could
design something with him. Group design is fun.
Yeah, if the rep rate doesn\'t need to be constant you can do without a
lot of stuff. Simplifies the tolerances too.
Schmitt gate inverter, one resistor, one thermistor. It\'s a PWM
temperature controller!
For sufficiently permissive definitions of \'controller\'. ;0
(It would be fairly challenging without at least one other resistor for
heating, unless you\'re just trying to control the temperature of the
thermistor.)
Cheers
Phil Hobbs
It would drive a mosfet or an SSR or something.