Re: [DIYbio] What's needed in open source PCRs?

On 01/26/2016 10:24 AM, Ujjwal Thaakar wrote:
> I'm also thinking about IoT or control using a mobile app. Not sure if that makes much sense going forward.

I like micropython -- it's ported to the ESP8266 low cost FCC certified wifi/microcontroller...and the new ESP32 will have
bluetooth also for phone app integration.

On 01/26/2016 10:25 AM, Ujjwal Thaakar wrote:
 > Hi John. I didn't understand that.
 >
 > On Tuesday, January 26, 2016 at 6:49:27 AM UTC+5:30, John Griessen wrote:
 >     100 Watts average is plenty for a small sample oven volume.

That means if the mass you are heating is small enough 100 Watts of power flow converted to heat by a resistive heater element is
enough to quickly cycle temperature -- enough to do PCR.

If you wanted a super steep ramp up,  saving some energy in a super cap would let you.

That means using all of the average power flow available (using the 20 Volt 100Watt mode of USB 3.1 type C).  Super caps charge up
quickly and hold energy densely, so they are a small practical component to store some energy between heater on times.
Then the stored energy can be released from the supercap to drive the heater harder when it is on.


and it would let you operate when someone tries powering from  a backward merely 5V USB supply.

This means also using stored energy saved up between heater on cycles, but when the input is from a 5V USB source it could be 1.5A
or 3.0 Amps yielding 7.5 Watts or 15 Watts.  That low power might limit thermocycling speed if cycling much mass in vials.
But, if you wait to charge the supercap for a bit, you could do a quick ramp up powered by the supercap.

--
-- You received this message because you are subscribed to the Google Groups DIYbio group. To post to this group, send email to diybio@googlegroups.com. To unsubscribe from this group, send email to diybio+unsubscribe@googlegroups.com. For more options, visit this group at https://groups.google.com/d/forum/diybio?hl=en
Learn more at www.diybio.org
---
You received this message because you are subscribed to a topic in the Google Groups "DIYbio" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/diybio/euT3tm4fA_g/unsubscribe.
To unsubscribe from this group and all its topics, send an email to diybio+unsubscribe@googlegroups.com.
To post to this group, send email to diybio@googlegroups.com.
Visit this group at https://groups.google.com/group/diybio.
To view this discussion on the web visit https://groups.google.com/d/msgid/diybio/56A7A764.7070901%40industromatic.com.
For more options, visit https://groups.google.com/d/optout.