Nifty mail box delivery this morning, a funny looking drill bit.
Ideally you would use it in conjunction with a pocket hole jig to ensure the correct angle but they are expensive so I’ll have a go at making one.
Nifty mail box delivery this morning, a funny looking drill bit.
Ideally you would use it in conjunction with a pocket hole jig to ensure the correct angle but they are expensive so I’ll have a go at making one.
Purchased one of these off Ebay for around $20 bucks so I can measure the speed of things, in particular the bandsaw.
Been going around measuring stuff that rotates – interesting.
Brought my Makita 6012HD 9.6V battery drill back to life!
As with most NiCad's of this vintage the 9.6V battery pack will not accept a charge.
It sill takes a charge so let's run the Makita off that via clip leads.
Basically we want to end up with a modified battery pack physically the same as before but with a decent figure 8 flex running from the bottom (offset to allow clip to close) and about 2mtrs long with battery terminal size alligator clips at the end.
To drop the voltage down from 12 to 9.6 we can use a few diodes.
We need to loose about 2.4V (12 – 9.6 = 2.4V)
Voltage drop across a silicon junction is 0.7 volts so:
3 diodes = 2.1V
4 diodes = 2.8V
However, we need to make some practical measurements…a full charged lead acid battery in good condition stands at 12.6V but most likely we are going to be using an old 2nd hand one with a lower terminal voltage.
OZCD144V1BK
Batteries starting to show signs of not holding charge. |
GTX1850K / GTX2450K
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