Comments on: SuperCap 9V battery http://hackaday.com/2005/12/06/supercap-9v-battery/ Fresh hacks every day Sun, 22 Nov 2009 00:33:45 +0000 http://wordpress.com/ hourly 1 By: Robert http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-105632 Robert Wed, 04 Nov 2009 17:31:43 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-105632 IS THIS YOUR PDF? http://www.scribd.com/doc/17684600/SuperCap-Battery Meh, probably not... Though, the circuit diagram is there... IS THIS YOUR PDF?
http://www.scribd.com/doc/17684600/SuperCap-Battery

Meh, probably not… Though, the circuit diagram is there…

]]> By: Anton http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-103729 Anton Sat, 24 Oct 2009 09:06:31 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-103729 Now that’s what I call a capacitor! Now that’s what I call a capacitor!

]]> By: Anton http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-101474 Anton Thu, 15 Oct 2009 12:37:48 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-101474 The link to the PDF article is a broken link The link to the PDF article is a broken link

]]> By: spuffler http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-89266 spuffler Tue, 25 Aug 2009 00:03:53 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-89266 Maxwell's stuff is quite pricey. The smallest BC series at 350F is $72 today at a popular online distributor..... I can go through an awful lot of alkaline 9V batteries for that. Maxwell’s stuff is quite pricey. The smallest BC series at 350F is $72 today at a popular online distributor….. I can go through an awful lot of alkaline 9V batteries for that.

]]> By: spuffler http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-89265 spuffler Mon, 24 Aug 2009 23:53:14 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-89265 Ah I see yaleman posted the link on Decc 13 2007, use your browser find function. Ah I see yaleman posted the link on Decc 13 2007, use your browser find function.

]]> By: spuffler http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-89264 spuffler Mon, 24 Aug 2009 23:50:51 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-89264 BTW, with SMT PWM and some finagling, you should be able to get 2 of those caps in there, for 2x the run time, which means very close to the same as the 9V battery it is replacing. BTW, with SMT PWM and some finagling, you should be able to get 2 of those caps in there, for 2x the run time, which means very close to the same as the 9V battery it is replacing.

]]> By: spuffler http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-89262 spuffler Mon, 24 Aug 2009 23:49:02 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-89262 The PDF file link is giving an error. The PDF file link is giving an error.

]]> By: tantris http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-75382 tantris Sat, 16 May 2009 15:54:10 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-75382 As mike, "..." and others have already pointed out: the energy a supercap holds is nowhere near that of a battery. You can use it however as backup power for things that use almost no energy (memory, some microchips on standby) or for something that runs intermittent. If parts are matched properly, a cap needs very little (read none) in charging circuits: A small solar cell (6V for a 5V cap) can charge a cap directly. The cap will pull down the voltage and the voltage rises as the cap charges. Once it reaches 5V, you have to start using the cap, so the voltage doesn't rise higher, or have a bypass zener. As mike, “…” and others have already pointed out: the energy a supercap holds is nowhere near that of a battery. You can use it however as backup power for things that use almost no energy (memory, some microchips on standby) or for something that runs intermittent. If parts are matched properly, a cap needs very little (read none) in charging circuits:
A small solar cell (6V for a 5V cap) can charge a cap directly. The cap will pull down the voltage and the voltage rises as the cap charges. Once it reaches 5V, you have to start using the cap, so the voltage doesn’t rise higher, or have a bypass zener.

]]> By: Ed Ianni http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-65809 Ed Ianni Tue, 10 Mar 2009 15:23:08 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-65809 I can't find the schematic for the "Supercap 9v Battery" by Eliot Phillips anywhere. Has it been removed. Thank you. Ed I can’t find the schematic for the “Supercap 9v Battery” by Eliot Phillips anywhere. Has it been removed. Thank you. Ed

]]> By: james http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-51960 james Sat, 22 Nov 2008 02:49:09 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-51960 maganda maganda

]]> By: emmanuel http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-51822 emmanuel Fri, 21 Nov 2008 04:38:50 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-51822 i want to try this but i don't know where to buy i want to try this but i don’t know where to buy

]]> By: Mark http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-42952 Mark Mon, 22 Sep 2008 11:22:01 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-42952 The link to the PDF article is a broken link... The link to the PDF article is a broken link…

]]> By: john mcc http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-15309 john mcc Mon, 04 Aug 2008 18:24:16 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-15309 Great circuit. Remember if you use typical 2N2222's for the transistors, put a 200 volt or greater rated diode across the collector-emitter of the transistors connected to the inductor or you will blow the transistors. Also, you can just use a 9 volt zener in place of the one transistor with no connection to it's collector. Great circuit. Remember if you use typical 2N2222’s for the transistors, put a 200 volt or greater rated diode across the collector-emitter of the transistors connected to the inductor or you will blow the transistors. Also, you can just use a 9 volt zener in place of the one transistor with no connection to it’s collector.

]]> By: yaleman http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-15308 yaleman Fri, 14 Dec 2007 02:36:36 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-15308 Just in case someone's looking for the PDF - I've found it here: <a href="http://www.digitalequilibrium.com/docs/9v_capacitor_battery.pdf" rel="nofollow">http://www.digitalequilibrium.com/docs/9v_capacitor_battery.pdf</a> Just in case someone’s looking for the PDF – I’ve found it here: http://www.digitalequilibrium.com/docs/9v_capacitor_battery.pdf

]]> By: john http://hackaday.com/2005/12/06/supercap-9v-battery/comment-page-3/#comment-15307 john Mon, 22 Oct 2007 05:18:17 +0000 http://hackaday.iheartcashews.com:8181/2005/12/06/supercap-9v-battery/#comment-15307 Hey! where the heck did the .pdf go?! Hey! where the heck did the .pdf go?!

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