- Joined
- Dec 29, 2012
- Messages
- 394
After experimenting with a Basic Battery Capacitance Charger (BBCC) I decided to build a better one with more capabilities and options.
Some changes to basic schematic were necessary.
As you can see above, 3 capacitors of values 6, 16 and 20 uF are used in order to have a range of output power.
SW1 SW2 SW3 AMPS
ON OFF OFF 0.2
OFF ON OFF 0.5
ON ON OFF 0.7
OFF OFF ON 1
ON OFF ON 1.2
OFF ON ON 1.5
ON ON ON 2
I have a range of capacitors and high voltage rectifier bridges (removed from computer PSUs)
A dead computer PSU could provide the enclosure for the parts
Guts removed and parts fit nicely inside
Original SPST Switch changed for a DPST so when is OFF both lines (L & N) will be cut off)
I made a rectangle hole for a Voltmeter – Ammeter
This AMMETER can measure up to 300V and 10A, but needs to be powered from 7 to 30 volts DC. So a small transformer 230 to 7,5v AC from an old cell phone PSU had to be modified adding a rectifier and a filter capacitor to provide 12,3V for the AMMETER.
It fits in the box nicely
A metal panel had to be prepared for the 3 rocker switches.
A paper pattern and a few dremel cutting disks later it was ready.
A label will make the box look nicer. It is a printout on special inkjet paper with two coats of clear varnish on top.
And the box is ready
Unfortunately the VOLT-AMMETER I have measures up to 100V so I have to wait for the new one (from ebay) to have the unit fully functional.
Until then I use my multimeter to read the battery voltage.
Thanks for reading
Petros
Some changes to basic schematic were necessary.
![Schem2.jpg Schem2.jpg](https://www.hobby-machinist.com/data/attachments/199/199773-d0cf6c4e46dac992771d4446fa41a5ab.jpg)
As you can see above, 3 capacitors of values 6, 16 and 20 uF are used in order to have a range of output power.
SW1 SW2 SW3 AMPS
ON OFF OFF 0.2
OFF ON OFF 0.5
ON ON OFF 0.7
OFF OFF ON 1
ON OFF ON 1.2
OFF ON ON 1.5
ON ON ON 2
I have a range of capacitors and high voltage rectifier bridges (removed from computer PSUs)
![Caps&Bridges.jpg Caps&Bridges.jpg](https://www.hobby-machinist.com/data/attachments/199/199774-cf7cb5ae0032a2f05d24dd0f6a36897e.jpg)
A dead computer PSU could provide the enclosure for the parts
![BoxPrep.jpg BoxPrep.jpg](https://www.hobby-machinist.com/data/attachments/199/199775-f54fe7f957d214aa9422e597493c2399.jpg)
Guts removed and parts fit nicely inside
![BoxPrep3a.jpg BoxPrep3a.jpg](https://www.hobby-machinist.com/data/attachments/199/199776-1347c016c7b728952530b6e2b7a2937f.jpg)
Original SPST Switch changed for a DPST so when is OFF both lines (L & N) will be cut off)
![BoxPrep4.jpg BoxPrep4.jpg](https://www.hobby-machinist.com/data/attachments/199/199777-7fefeadf702883d135e52dd03ad9c935.jpg)
I made a rectangle hole for a Voltmeter – Ammeter
![BoxPrep2a.jpg BoxPrep2a.jpg](https://www.hobby-machinist.com/data/attachments/199/199778-1f4d7b716e7853fdff30175b8e7c9b36.jpg)
This AMMETER can measure up to 300V and 10A, but needs to be powered from 7 to 30 volts DC. So a small transformer 230 to 7,5v AC from an old cell phone PSU had to be modified adding a rectifier and a filter capacitor to provide 12,3V for the AMMETER.
![TrafoAll.jpg TrafoAll.jpg](https://www.hobby-machinist.com/data/attachments/199/199779-2663de82a7622fb96ba7a8f2ae5ebd9c.jpg)
It fits in the box nicely
![Trafo5.jpg Trafo5.jpg](https://www.hobby-machinist.com/data/attachments/199/199780-d9acc7ada223703a4692f77555064567.jpg)
A metal panel had to be prepared for the 3 rocker switches.
![Panel.jpg Panel.jpg](https://www.hobby-machinist.com/data/attachments/199/199781-289718f5bf56686f6cfbfbb304ef5a26.jpg)
A paper pattern and a few dremel cutting disks later it was ready.
![Front Panel1.jpg Front Panel1.jpg](https://www.hobby-machinist.com/data/attachments/199/199782-798dd40cf99ec7957e17879551d7180d.jpg)
A label will make the box look nicer. It is a printout on special inkjet paper with two coats of clear varnish on top.
![Label2.jpg Label2.jpg](https://www.hobby-machinist.com/data/attachments/199/199783-59f71b387149821985fa43e99fb205a3.jpg)
And the box is ready
![Label4.jpg Label4.jpg](https://www.hobby-machinist.com/data/attachments/199/199784-03db5906768140c3b022e6e6ac13a9bc.jpg)
Unfortunately the VOLT-AMMETER I have measures up to 100V so I have to wait for the new one (from ebay) to have the unit fully functional.
![AMMETER.jpg AMMETER.jpg](https://www.hobby-machinist.com/data/attachments/199/199785-9dfa48ed5c4c24d85bef5ff5eedebfc8.jpg)
Until then I use my multimeter to read the battery voltage.
Thanks for reading
Petros