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I need to convert 1Vdc to 5Vdc. I can find a lot of circuit for
bigger amounts but nothing for the little bit I want. So any help is
appreciated.
Andy
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Author: BobGDate: 20:59 02-04-08
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On Apr 2, 8:36=EF=BF=BDpm, a...@you.com wrote:
> I need to convert 1Vdc to 5Vdc. =EF=BF=BDI can find a lot of circuit for
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
How about a pair of germanium transistors as common emitter amps, the
collector of each driving the base of the other forming an
oscillator... should run down to about .2V or whatever a germanium
transistor vbe is. Run the square wave from the collectors into a step
up transformer, and Bob's Yer Uncle.
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Author: JoergDate: 21:02 02-04-08
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Author: David L. JonesDate: 21:17 02-04-08
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On Apr 3, 11:36 am, a...@you.com wrote:
> I need to convert 1Vdc to 5Vdc. I can find a lot of circuit for
> bigger amounts but nothing for the little bit I want. So any help is
> appreciated.
>
> Andy
Something like the MAX866 is what you want. Works down to 0.8V
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1210
Maxim give free samples ;-)
Dave.
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Author: David L. JonesDate: 21:20 02-04-08
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On Apr 3, 11:36 am, a...@you.com wrote:
> I need to convert 1Vdc to 5Vdc. I can find a lot of circuit for
> bigger amounts but nothing for the little bit I want. So any help is
> appreciated.
>
> Andy
What sort of load current?
Dave.
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Author: JoergDate: 21:32 02-04-08
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David L. Jones wrote:
> On Apr 3, 11:36 am, a...@you.com wrote:
>> I need to convert 1Vdc to 5Vdc. I can find a lot of circuit for
>> bigger amounts but nothing for the little bit I want. So any help is
>> appreciated.
>>
>> Andy
>
> Something like the MAX866 is what you want. Works down to 0.8V
> http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1210
> Maxim give free samples ;-)
>
I think they recommend the MAX1678 for new designs. However, if this is
for mass production be careful WRT availability. Digikey says zero stock
on the 1678. Why am I not surprised about that?
--
Regards, Joerg
http://www.analogconsultants.com/
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Author: Paul E. SchoenDate: 01:56 03-04-08
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<a@you.com> wrote in message
news:ah98v3pm3graj9uutfgp1aflbj5146c0p2@4ax.com...
>I need to convert 1Vdc to 5Vdc. I can find a lot of circuit for
> bigger amounts but nothing for the little bit I want. So any help is
> appreciated.
>
> Andy
Try the www.linear.com LT3400. It works down to 0.85 volts. The attached
LTSpice simulation shows an efficiency of 87%, driving 5 volts into 100
ohms. I don't trust the simulator so much since I got over 300% efficiency
on a previous model, but this seems about right. They claim 92% typical.
They also have an LTC3401 which runs at 3 MHz and has synchronous
rectification for up to 97% efficiency. You can try these models using the
LTC jigs.
These parts can actually produce one or two watts output.
You can get free samples direct from Linear and order small quantities.
These parts cost about $2 to $3.
Paul
========================================================================================
===
Version 4
SHEET 1 2552 1624
WIRE 1696 1120 1600 1120
WIRE 1872 1120 1696 1120
WIRE 1920 1120 1872 1120
WIRE 2064 1120 2000 1120
WIRE 1600 1152 1600 1120
WIRE 1872 1184 1872 1120
WIRE 2064 1248 2064 1120
WIRE 2064 1248 2016 1248
WIRE 1600 1264 1600 1232
WIRE 1696 1328 1696 1120
WIRE 1728 1328 1696 1328
WIRE 2080 1328 2016 1328
WIRE 2240 1328 2080 1328
WIRE 2336 1328 2240 1328
WIRE 2336 1344 2336 1328
WIRE 2240 1360 2240 1328
WIRE 2080 1408 2016 1408
WIRE 2080 1424 2080 1408
WIRE 2240 1456 2240 1424
WIRE 2336 1456 2336 1424
WIRE 1872 1488 1872 1472
WIRE 2080 1520 2080 1504
FLAG 1872 1488 0
FLAG 2080 1520 0
FLAG 1600 1264 0
FLAG 2240 1456 0
FLAG 2336 1456 0
FLAG 2336 1328 OUT
FLAG 1600 1120 IN
SYMBOL POWERPRODUCTS\\LTC3400 1872 1328 R0
SYMATTR InstName U1
SYMBOL ind 1904 1136 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 5 56 VBottom 0
SYMATTR InstName L1
SYMATTR Value 4.7µ
SYMATTR SpiceLine Rser=0.1
SYMBOL RES 2064 1312 R0
SYMATTR InstName R1
SYMATTR Value 1.5Meg
SYMBOL res 2064 1408 R0
SYMATTR InstName R2
SYMATTR Value 500k
SYMBOL VOLTAGE 1600 1136 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value .9
SYMBOL cap 2224 1360 R0
SYMATTR InstName C1
SYMATTR Value 4.7µ
SYMBOL res 2320 1328 R0
SYMATTR InstName Rload
SYMATTR Value 100
TEXT 2168 1504 Left 0 !.tran 500u startup
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On Wed, 2 Apr 2008 18:20:27 -0700 (PDT), "David L. Jones"
<altzone@gmail.com> wrote:
>On Apr 3, 11:36 am, a...@you.com wrote:
>> I need to convert 1Vdc to 5Vdc. I can find a lot of circuit for
>> bigger amounts but nothing for the little bit I want. So any help is
>> appreciated.
>>
>> Andy
>
>What sort of load current?
>
>Dave.
I am looking at running a small motor
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Author: John FieldsDate: 18:34 03-04-08
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On Thu, 03 Apr 2008 21:42:16 GMT, a@you.com wrote:
>On Wed, 2 Apr 2008 18:20:27 -0700 (PDT), "David L. Jones"
><altzone@gmail.com> wrote:
>
>>On Apr 3, 11:36 am, a...@you.com wrote:
>>> I need to convert 1Vdc to 5Vdc. I can find a lot of circuit for
>>> bigger amounts but nothing for the little bit I want. So any help is
>>> appreciated.
>>>
>>> Andy
>>
>>What sort of load current?
>>
>>Dave.
>
>I am looking at running a small motor
---
How much current does it need fully loaded?
JF
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Author: JoergDate: 19:13 03-04-08
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a@you.com wrote:
> On Wed, 2 Apr 2008 18:20:27 -0700 (PDT), "David L. Jones"
> <altzone@gmail.com> wrote:
>
>> On Apr 3, 11:36 am, a...@you.com wrote:
>>> I need to convert 1Vdc to 5Vdc. I can find a lot of circuit for
>>> bigger amounts but nothing for the little bit I want. So any help is
>>> appreciated.
>>>
>>> Andy
>> What sort of load current?
>>
>> Dave.
>
> I am looking at running a small motor
Can't you use a low voltage motor? This company has versions down to
1.5V nominal supply:
http://www.micromo.com/uploadpk/0615_S_MME.pdf
Ok, it's kind of the high end but if it has to be cheap there should be
others. There are lots of low cost gizmos that run off a single battery,
such as some of those water-spritz fans on a can. The amount of
electronics in there is zilch.
--
Regards, Joerg
http://www.analogconsultants.com/
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Author: John FieldsDate: 20:46 03-04-08
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On Thu, 03 Apr 2008 23:13:25 GMT, Joerg
<notthisjoergsch@removethispacbell.net> wrote:
>a@you.com wrote:
>> On Wed, 2 Apr 2008 18:20:27 -0700 (PDT), "David L. Jones"
>> <altzone@gmail.com> wrote:
>>
>>> On Apr 3, 11:36 am, a...@you.com wrote:
>>>> I need to convert 1Vdc to 5Vdc. I can find a lot of circuit for
>>>> bigger amounts but nothing for the little bit I want. So any help is
>>>> appreciated.
>>>>
>>>> Andy
>>> What sort of load current?
>>>
>>> Dave.
>>
>> I am looking at running a small motor
>
>
>Can't you use a low voltage motor? This company has versions down to
>1.5V nominal supply:
>
>http://www.micromo.com/uploadpk/0615_S_MME.pdf
>
>Ok, it's kind of the high end...
---
Indeed.
I've used their stuff and it's absolutely gorgeous.
JF
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Author: JoergDate: 20:55 03-04-08
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John Fields wrote:
> On Thu, 03 Apr 2008 23:13:25 GMT, Joerg
> <notthisjoergsch@removethispacbell.net> wrote:
>
>> a@you.com wrote:
>>> On Wed, 2 Apr 2008 18:20:27 -0700 (PDT), "David L. Jones"
>>> <altzone@gmail.com> wrote:
>>>
>>>> On Apr 3, 11:36 am, a...@you.com wrote:
>>>>> I need to convert 1Vdc to 5Vdc. I can find a lot of circuit for
>>>>> bigger amounts but nothing for the little bit I want. So any help
is
>>>>> appreciated.
>>>>>
>>>>> Andy
>>>> What sort of load current?
>>>>
>>>> Dave.
>>> I am looking at running a small motor
>>
>> Can't you use a low voltage motor? This company has versions down to
>> 1.5V nominal supply:
>>
>> http://www.micromo.com/uploadpk/0615_S_MME.pdf
>>
>> Ok, it's kind of the high end...
>
> ---
> Indeed.
>
> I've used their stuff and it's absolutely gorgeous.
>
It sure is. The other end of the price spectrum would be the $4.95
bottles with squirt lever and neoprene-blade fan. Some of those motors
also runs on a single AA cell. When my wife bought one I scoffed but
they really do work when it's north of 100F outside.
--
Regards, Joerg
http://www.analogconsultants.com/
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Author: Lord GarthDate: 22:42 03-04-08
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"Joerg" <notthisjoergsch@removethispacbell.net> wrote in message
news:_%eJj.43$FF6.42@newssvr29.news.prodigy.net...
<snip>
>>
>> I've used their stuff and it's absolutely gorgeous.
>>
>
> It sure is. The other end of the price spectrum would be the $4.95 bottles
> with squirt lever and neoprene-blade fan. Some of those motors also runs
> on a single AA cell. When my wife bought one I scoffed but they really do
> work when it's north of 100F outside.
>
Not around here, the humidity is too high.
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Author: Rich GriseDate: 17:47 04-04-08
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On Fri, 04 Apr 2008 00:55:22 +0000, Joerg wrote:
> John Fields wrote:
>> On Thu, 03 Apr 2008 23:13:25 GMT, Joerg
>>> a@you.com wrote:
>>>> On Wed, 2 Apr 2008 18:20:27 -0700 (PDT), "David L. Jones"
>>>>> On Apr 3, 11:36 am, a...@you.com wrote:
>>>>>> I need to convert 1Vdc to 5Vdc. I can find a lot of circuit
for
>>>>>> bigger amounts but nothing for the little bit I want. So any
help is
>>>>>> appreciated.
>>>>>>
>>>>> What sort of load current?
>>>>>
>>>> I am looking at running a small motor
>>>
>>> Can't you use a low voltage motor? This company has versions down to
>>> 1.5V nominal supply:
>>>
>>> http://www.micromo.com/uploadpk/0615_S_MME.pdf
>>>
>>> Ok, it's kind of the high end...
>>
>> Indeed.
>>
>> I've used their stuff and it's absolutely gorgeous.
>
> It sure is. The other end of the price spectrum would be the $4.95
> bottles with squirt lever and neoprene-blade fan. Some of those motors
> also runs on a single AA cell. When my wife bought one I scoffed but
> they really do work when it's north of 100F outside.
Whatever happened to those "hobby motors" that were about a dime a dozen?
I have a schpritzer as well for the hot weather, and I've been known to
freeze it before I go out - the ambient will start melting the ice as
soon as you get it out, and it'll be ready to spray ice water in a few
minutes. :-)
Cheers!
Rich
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Author: JoergDate: 19:36 04-04-08
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Rich Grise wrote:
> On Fri, 04 Apr 2008 00:55:22 +0000, Joerg wrote:
>> John Fields wrote:
>>> On Thu, 03 Apr 2008 23:13:25 GMT, Joerg
>>>> a@you.com wrote:
>>>>> On Wed, 2 Apr 2008 18:20:27 -0700 (PDT), "David L. Jones"
>>>>>> On Apr 3, 11:36 am, a...@you.com wrote:
>>>>>>> I need to convert 1Vdc to 5Vdc. I can find a lot of
circuit for
>>>>>>> bigger amounts but nothing for the little bit I want. So
any help is
>>>>>>> appreciated.
>>>>>>>
>>>>>> What sort of load current?
>>>>>>
>>>>> I am looking at running a small motor
>>>> Can't you use a low voltage motor? This company has versions down to
>>>> 1.5V nominal supply:
>>>>
>>>> http://www.micromo.com/uploadpk/0615_S_MME.pdf
>>>>
>>>> Ok, it's kind of the high end...
>>> Indeed.
>>>
>>> I've used their stuff and it's absolutely gorgeous.
>> It sure is. The other end of the price spectrum would be the $4.95
>> bottles with squirt lever and neoprene-blade fan. Some of those motors
>> also runs on a single AA cell. When my wife bought one I scoffed but
>> they really do work when it's north of 100F outside.
>
> Whatever happened to those "hobby motors" that were about a dime a dozen?
>
The same that happened to the electronics store down the road: Gone.
Nowadays kids get everything they want. They don't have to tinker and
build stuff. So they don't.
> I have a schpritzer as well for the hot weather, and I've been known to
> freeze it before I go out - the ambient will start melting the ice as
> soon as you get it out, and it'll be ready to spray ice water in a few
> minutes. :-)
>
Take the battery out first ;-)
--
Regards, Joerg
http://www.analogconsultants.com/
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Author: Ken FowlerDate: 17:47 05-04-08
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On 4-Apr-2008, Rich Grise <rich@example.net> wrote:
> > It sure is. The other end of the price spectrum would be the $4.95
> > bottles with squirt lever and neoprene-blade fan. Some of those motors
> > also runs on a single AA cell. When my wife bought one I scoffed but
> > they really do work when it's north of 100F outside.
>
> Whatever happened to those "hobby motors" that were about a dime a dozen?
>
> I
I needed hundreds of 1.5 V hobby motors for a Cub Scout Day Camp project in
2006. Found some at:
http://www.kelvin.com/Merchant2/merchant.mv?Screen=CTGY&Store_Code=K&Category_Co
de=LRPPMO
, not exactly "dime a dozen" but I got them for ~$0.69. I notice that the
price has now gone up.
Kelvin is a reasonable source for hobby parts for schools and kids.
Ken Fowler
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Author: defaultDate: 10:30 06-04-08
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On Fri, 04 Apr 2008 21:47:38 GMT, Rich Grise <rich@example.net> wrote:
>On Fri, 04 Apr 2008 00:55:22 +0000, Joerg wrote:
>> John Fields wrote:
>>> On Thu, 03 Apr 2008 23:13:25 GMT, Joerg
>>>> a@you.com wrote:
>>>>> On Wed, 2 Apr 2008 18:20:27 -0700 (PDT), "David L. Jones"
>>>>>> On Apr 3, 11:36 am, a...@you.com wrote:
>>>>>>> I need to convert 1Vdc to 5Vdc. I can find a lot of
circuit for
>>>>>>> bigger amounts but nothing for the little bit I want. So
any help is
>>>>>>> appreciated.
>>>>>>>
>>>>>> What sort of load current?
>>>>>>
>>>>> I am looking at running a small motor
>>>>
>>>> Can't you use a low voltage motor? This company has versions down to
>>>> 1.5V nominal supply:
>>>>
>>>> http://www.micromo.com/uploadpk/0615_S_MME.pdf
>>>>
>>>> Ok, it's kind of the high end...
>>>
>>> Indeed.
>>>
>>> I've used their stuff and it's absolutely gorgeous.
>>
>> It sure is. The other end of the price spectrum would be the $4.95
>> bottles with squirt lever and neoprene-blade fan. Some of those motors
>> also runs on a single AA cell. When my wife bought one I scoffed but
>> they really do work when it's north of 100F outside.
>
>Whatever happened to those "hobby motors" that were about a dime a dozen?
>
>I have a schpritzer as well for the hot weather, and I've been known to
>freeze it before I go out - the ambient will start melting the ice as
>soon as you get it out, and it'll be ready to spray ice water in a few
>minutes. :-)
>
>Cheers!
>Rich
price is up to $6.95/doz. or $5.95/2 doz.
http://scientificsonline.com/product.asp?pn=3082264&bhcd2=1207494084
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