This is a PC board I made so I can charge a 48V seal lead acid battery from any 12VDC source. This design is simple and uses an off-the-shelf audio crossover coil. It charges my battery from a 12V source that gets switched on once the sun goes down. In the morning my batteries are ready to go and it didn't cost me anything. Energy from the sun. However I can use with and 12V source that can provide 2-3 amps of power. There is a special circuit that will stop the SMPS once the battery level low around 11 volts. Next day the sun comes up and charges the 12V battery.
Showing posts with label Electric. Show all posts
Showing posts with label Electric. Show all posts
Homemade 12V to 48V DC-DC Converter Battery Charger for Electric Scooter/Bike
Saturday, September 8, 2012
Homemade 12V to 48V DC-DC Converter Battery Charger for Electric Scooter/Bike Tube. Duration : 6.07 Mins.
This is a PC board I made so I can charge a 48V seal lead acid battery from any 12VDC source. This design is simple and uses an off-the-shelf audio crossover coil. It charges my battery from a 12V source that gets switched on once the sun goes down. In the morning my batteries are ready to go and it didn't cost me anything. Energy from the sun. However I can use with and 12V source that can provide 2-3 amps of power. There is a special circuit that will stop the SMPS once the battery level low around 11 volts. Next day the sun comes up and charges the 12V battery.
This is a PC board I made so I can charge a 48V seal lead acid battery from any 12VDC source. This design is simple and uses an off-the-shelf audio crossover coil. It charges my battery from a 12V source that gets switched on once the sun goes down. In the morning my batteries are ready to go and it didn't cost me anything. Energy from the sun. However I can use with and 12V source that can provide 2-3 amps of power. There is a special circuit that will stop the SMPS once the battery level low around 11 volts. Next day the sun comes up and charges the 12V battery.
Electric Bike 3-Phase BLDC Hub Motor Controller Home Build Open Source Project Part #1-Prototype PCB
Sunday, August 12, 2012
Electric Bike 3-Phase BLDC Hub Motor Controller Home Build Open Source Project Part #1-Prototype PCB Video Clips. Duration : 9.92 Mins.
I have been very pleased with my DAYMAK AUSTIN electric motor bike. This is the fourth season of riding around the city streets and local highways. I have had a few electrical/electronic issues which I repaired quickly. However as with all new things there is room for improvement. Wouldn't low speed reverse be nice for backing your bike into the shed or garage. How about going FASTER with MORE torque. After all that then there is the sealed lead acid battery pack. Control of the low battery cut off voltage without starting a fire. Maybe regenerative braking to extend battery capacity. A faster, quicker charger would be nice. How about a solar charger. You'll want to checkout my 12V to 48V DC-DC inverter charging circuit that uses solar energy stored in a 12V battery and charges my 48V battery pack for free at the end of this video. I have made a few of these as well as a RV charger that charges the ebike's 48V to 72V battery while the RV is being driven from town to town. I'm not the only crazy eletronics guy who thinks that these new electric vehicles are the way to go. Well I set out to make my own controller with a few improvements. I started by making my own 3-phase brushless DC hub motor controller circuit and board PC board layout. Exposed, developed, etched the PC board from scratch. Drilled out all the holes and assembled the parts into the controller board. Using my in-circuit programmer debugger I wrote up the machine language program and downloaded it. Bingo a ...
I have been very pleased with my DAYMAK AUSTIN electric motor bike. This is the fourth season of riding around the city streets and local highways. I have had a few electrical/electronic issues which I repaired quickly. However as with all new things there is room for improvement. Wouldn't low speed reverse be nice for backing your bike into the shed or garage. How about going FASTER with MORE torque. After all that then there is the sealed lead acid battery pack. Control of the low battery cut off voltage without starting a fire. Maybe regenerative braking to extend battery capacity. A faster, quicker charger would be nice. How about a solar charger. You'll want to checkout my 12V to 48V DC-DC inverter charging circuit that uses solar energy stored in a 12V battery and charges my 48V battery pack for free at the end of this video. I have made a few of these as well as a RV charger that charges the ebike's 48V to 72V battery while the RV is being driven from town to town. I'm not the only crazy eletronics guy who thinks that these new electric vehicles are the way to go. Well I set out to make my own controller with a few improvements. I started by making my own 3-phase brushless DC hub motor controller circuit and board PC board layout. Exposed, developed, etched the PC board from scratch. Drilled out all the holes and assembled the parts into the controller board. Using my in-circuit programmer debugger I wrote up the machine language program and downloaded it. Bingo a ...
Removing an SRAM Powerlink from a bicycle chain
Friday, August 3, 2012
Removing an SRAM Powerlink from a bicycle chain Tube. Duration : 0.48 Mins.
How to remove and attach an SRAM powerlink from a bicycle chain. Filmed by Dave.
How to remove and attach an SRAM powerlink from a bicycle chain. Filmed by Dave.
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