Open Gel Box 2.0 conference call 2009-01-30
- notes by *firstname.lastname@example.org 16:54, 30 January 2009 (EST)
Discussion on gel box and p/s design:
Goals for gel box & related:
- standardization; pick what we want, have everyone use it; get everyone on the same page for experimental results, etc.
- safety; pick the best reagents & components for safety
- Compare up front costs -vs- run rate costs
--- "ease of use for hobbyist"; professional equip is meant to run 1000's of times; hobby equipment may run 100 times; different cost model. May want lower up front with higher run rate cost, if it makes sense.
- (Norman) Result of gel box are going into biz plan competition
- (Norman) standardizing the power supply to power multiple components (gel box, thermocycler, etc.)
- (Mac) http://www.ponoko.com/ - open source manufacturing
- (Jonathan) Look at discovery channel dna explorer for business target volumes and costs
Reasons for building a custom supply:
- (norman) wants to supply the illuminator, etc as well; peripheral support (LEDs, peltier device)
- presumed lower cost? TBD.
- (tito) experimenting with different voltages for those designing the gel box (however end user won't need variable voltages?)
- Norman's results show 60v, 90v, 120v
- Norman's results show 100mA is sufficient
Why use a variable supply? Fixed supply is OK.
- (Norman) fixed supply anywhere in the range 90-120 for "FAST RUN"
- (Norman) fixed supply anywhere in the range 60v for "SLOW RUN"
- (Tito) would like to test "better faster gels" (would need 300v) -- wait on the results on this; this will "gel system 3.0", not now
- (Jonathan) philip is building the experimenter-supply for ~300VDC variable output; coming soon
- (Jonathan) try the nixie supply for ~150V-180VDC for experimenting
- (Tito) Where can I buy a supply right now w/o any electronics construction that does this? Only found this one: http://educationalscience.com/merchant.ihtml?merchantid=4&pid=3178&step=4&passwordstatus=:passwordstatus
- (Jonathan) At $100 seems cheap. Price makes sense because of manufacturing volume. Not a lot of volume for this voltage range ~100v supply.
- (Jonathan) closest other method is to use +12V supply into off-the-shelf inverter to 120VAC then use a bridge+RC to filter to ~90VDC.
What other peripherals might need to be connected?
- (Jonathan) Also see, the DIY spectrophotometer; possible "peripheral" to "gel system".
- (Jonathan) customer wants a full set of equipment to use in the lab