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| nctnico:
--- Quote from: SilverSolder on March 11, 2021, 10:50:03 pm --- --- Quote from: Anthocyanina on March 11, 2021, 08:26:04 am ---with all the talk about the crowbar circuits in this topic, something i've never heard of before, i wonder why don't they implement a battery charging mode then? push the battery mode button = disconnect the crowbar until the battery mode button is pushed again? can just be a regular latching switch and have the power supply detect if it's closed or not so that it knows it's still in battery mode after turning it off then on again? this doesn't sound too hard to implement i think, maybe would add about 5$ in parts, but when talking about 1k$ power supplies, would that hurt too much? --- End quote --- A crowbar can effectively be disabled by setting its threshold higher than the max output of the supply. That's how the crowbar I have here works, anyway. So you can leave the crowbar "off" (effectively) if you don't need the protection. --- End quote --- Not so fast... a crowbar can also kick in in case the voltage at the output is higher than the setpoint. |
| SilverSolder:
--- Quote from: nctnico on March 11, 2021, 10:54:39 pm --- --- Quote from: SilverSolder on March 11, 2021, 10:50:03 pm --- --- Quote from: Anthocyanina on March 11, 2021, 08:26:04 am ---with all the talk about the crowbar circuits in this topic, something i've never heard of before, i wonder why don't they implement a battery charging mode then? push the battery mode button = disconnect the crowbar until the battery mode button is pushed again? can just be a regular latching switch and have the power supply detect if it's closed or not so that it knows it's still in battery mode after turning it off then on again? this doesn't sound too hard to implement i think, maybe would add about 5$ in parts, but when talking about 1k$ power supplies, would that hurt too much? --- End quote --- A crowbar can effectively be disabled by setting its threshold higher than the max output of the supply. That's how the crowbar I have here works, anyway. So you can leave the crowbar "off" (effectively) if you don't need the protection. --- End quote --- Not so fast... a crowbar can also kick in in case the voltage at the output is higher than the setpoint. --- End quote --- Yes, but if the battery exceeds the max voltage that the supply is capable of... you really are trying to break it! :D I have never managed to trigger the crowbar unintentionally. I very rarely use it... for protection, I just set the CC just over what the DUT normally uses, that is usually good enough protection for Australia. |
| Neganur:
Related to the new EDU-series instruments, I couldn't help but notice the following note in the German Batronix store: "Attention: According to the manufacturer Keysight products may not be sold to private customers. Please contact our sales team" err.......ok? That was unexpected. source |
| Qw3rtzuiop:
--- Quote from: Neganur on March 17, 2021, 01:28:46 pm ---Related to the new EDU-series instruments, I couldn't help but notice the following note in the German Batronix store: --- End quote --- This seems to be some batronix specific restriction. Other distributors will sell to private customers. https://www.eevblog.com/forum/testgear/keysight-products-not-to-be-sold-to-private-customers/ |
| Lowkus:
The dark coloring of the housing might be a functional consideration. Computer software has been moving toward darker themes because it can be more relaxing on the eyes, in particular it lessens the appearance of vitreous floaters. |
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