Ryobi Adapter: Difference between revisions
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The other option I'm considering is a deep cycle battery. The catch is that I can't get one near 20v, so I need a boost converter. But I can just double the voltage. The deep cycle battery would probably be around $25. | The other option I'm considering is a deep cycle battery. The catch is that I can't get one near 20v, so I need a boost converter. But I can just double the voltage. The deep cycle battery would probably be around $25. | ||
http://www. | http://www.electroschematics.com/648/555-voltage-doubler/ | ||
http://www.circuitsgallery.com/2013/04/automatic-battery-charger-controller.html | http://www.circuitsgallery.com/2013/04/automatic-battery-charger-controller.html | ||
Transistors need to be TO-3 packages. | |||
* Battery $25 | |||
* NPN power transistor $2.50 | |||
* PNP power transistor $2.50 | |||
* Heatsink $3 | |||
* Caps $3.75 | |||
Revision as of 16:33, 18 October 2015
They sell these, but they're underpowered. I'm going to build mine at 20V, that's what the 18V battery measures when it's charged.
I'll start with a 24V transformer. I found a MC33167 that might get it down to 20V (rate 5A). LT1270ACT is rated at 10A
this guy used 20 amps. I found this on Amazon, which seems like it would work pretty well.
Deep Cycle
The other option I'm considering is a deep cycle battery. The catch is that I can't get one near 20v, so I need a boost converter. But I can just double the voltage. The deep cycle battery would probably be around $25.
http://www.electroschematics.com/648/555-voltage-doubler/
http://www.circuitsgallery.com/2013/04/automatic-battery-charger-controller.html
Transistors need to be TO-3 packages.
- Battery $25
- NPN power transistor $2.50
- PNP power transistor $2.50
- Heatsink $3
- Caps $3.75