Hello all
I'm needing to modify the PICAXE 18 pin project board (High power version) to allow me to use a 12v supply to drive the H-Bridge.
I'm looking over the schematics and am aware of the changes from v2 to v3 to allow this kind of modification however I'm finding it bit hazy and am quite paranoid (Blown two PICAXE 18X's so far, don't want a third) about adding the seperate power supply, I'll be using a little 3 x AA battery box to power the PICAXE but i need to drive two gear-head motors with a 12v NiCad Battery, however the documentation states that a maximum of 6v is allowed, and i'm assuming that is because the power to the H-Bridge IC and the PICAXE is shared.
I'm assuming but not sure, there is a small resistor type thing (Single black band, I think its just a link) at the top near the programming jack, is it separating the power supplies the same way that the low power board with the darlingtons does? where you remove this resistor and the power supplies are isolated from each other.
I certainly don't want 12v channeling through my PICAXE and having to replace it again, so is anyone able to confirm this or inform me of the correct way to modify the board? (Again the instructions i found fairly difficult to understand)
I'm needing to modify the PICAXE 18 pin project board (High power version) to allow me to use a 12v supply to drive the H-Bridge.
I'm looking over the schematics and am aware of the changes from v2 to v3 to allow this kind of modification however I'm finding it bit hazy and am quite paranoid (Blown two PICAXE 18X's so far, don't want a third) about adding the seperate power supply, I'll be using a little 3 x AA battery box to power the PICAXE but i need to drive two gear-head motors with a 12v NiCad Battery, however the documentation states that a maximum of 6v is allowed, and i'm assuming that is because the power to the H-Bridge IC and the PICAXE is shared.
I'm assuming but not sure, there is a small resistor type thing (Single black band, I think its just a link) at the top near the programming jack, is it separating the power supplies the same way that the low power board with the darlingtons does? where you remove this resistor and the power supplies are isolated from each other.
I certainly don't want 12v channeling through my PICAXE and having to replace it again, so is anyone able to confirm this or inform me of the correct way to modify the board? (Again the instructions i found fairly difficult to understand)