Hi all,
Despite the topic title, I'm not trying to use a simple linear regulator to 'step up' voltage
Essentially I have several 'modules' I've made for various microcontroller stuff, and because I wanted to use them 'standalone' on each one I have included a simple 7805 reg circuit, with a DC socket for a plug-in power supply.
This works like a charm, but.... would it be possible to use just one of these regulators, and power the other boards from it? (we're talking <100mA total system current). The reason I ask is because then all the regulators on each of the other boards would then have their outputs at 5v, but their inputs at 0v. Would a simple diode going from Vout to Vin be sufficient? Essentially we are tlaking about having parallel regulators, with their Vout's tied, BUT only one regulator's Vin has voltage.
I haven't implemented 'jumpers' for on board power supplys, or diodes in series with the regulators outputs, so unless the diode thing works, I will have to build a power supply with multiple DC jack cables, one for each board >.<
Sorry for the simple question, hope someone can help, I 'would' test this, but I really don't want to blow any of the regulators, because they are not easy to replace on these PCB's (Dpak, SMT).
Cheers,
Blueteeth
Despite the topic title, I'm not trying to use a simple linear regulator to 'step up' voltage
Essentially I have several 'modules' I've made for various microcontroller stuff, and because I wanted to use them 'standalone' on each one I have included a simple 7805 reg circuit, with a DC socket for a plug-in power supply.
This works like a charm, but.... would it be possible to use just one of these regulators, and power the other boards from it? (we're talking <100mA total system current). The reason I ask is because then all the regulators on each of the other boards would then have their outputs at 5v, but their inputs at 0v. Would a simple diode going from Vout to Vin be sufficient? Essentially we are tlaking about having parallel regulators, with their Vout's tied, BUT only one regulator's Vin has voltage.
I haven't implemented 'jumpers' for on board power supplys, or diodes in series with the regulators outputs, so unless the diode thing works, I will have to build a power supply with multiple DC jack cables, one for each board >.<
Sorry for the simple question, hope someone can help, I 'would' test this, but I really don't want to blow any of the regulators, because they are not easy to replace on these PCB's (Dpak, SMT).
Cheers,
Blueteeth