17
votes
How can prevent the source voltage from dropping when using a 555 timer
The root problem is not external inductance, it is an internal design flaw.
The original bipolar 555 design is notorious for output stage cross-conduction. This is a condition where both output ...
- 18.2k
7
votes
Accepted
How can prevent the source voltage from dropping when using a 555 timer
The problem is most likely the lack of a power supply decoupling capacitor. When using a breadboard to prototype analog circuits I always put a 10uF capacitor on the supply rail.
- 1,105
4
votes
Confused about the safe operating area of a MOSFET graph
Please note the test conditions in the upper right corner.
As long as you have a cooling mechanism that manages to keep the case temperature at 25 °C, the die will not go above 175 °C, and it will ...
- 18.8k
3
votes
Microwave output power seems inconsistent with supply voltage
There is an impedance-matching network, presumably from a lower impedance at the die itself (which indeed cannot pull drain voltage below 0V), to the characteristic-impedance ports/pins/traces.
...
- 27.2k
3
votes
Level Shifter design. 0-10vdc to 0-24vdc using pnp transistor
The solution is a circuit similar to the one posted by Jens, but delete one resistor and add one 18 V zener diode. This prevents the transistor from conducting when the input is high.
When the input ...
- 18.2k
2
votes
Level Shifter design. 0-10vdc to 0-24vdc using pnp transistor
Since you've added that you can use NPN transistors, this is a reliable way to do what you request. If you can invert the input by some other means you can eliminate Q1 and R1 (connect R4 to Q2 base).
...
- 384k
1
vote
Level Shifter design. 0-10vdc to 0-24vdc using pnp transistor
With these resistor values the output voltage changes at an input voltage of around 8 V.
If SW1 is open or V1 is at 0 V the base current of Q1 is high enough to provide close to 24 V at the PLC input (...
- 6,162
1
vote
Need cheap variable positive/negative switching bench power supply with CC
To provide a formal answer, here is my take.
For hobby use where noise and minor inconsistencies don't matter, your design will do exactly what you need it to do.
I would suggest connecting a dual-...
- 326
1
vote
Accepted
Relationship Between Current and Power in a Refrigerator
"Defrost Amps: 4.4" means that up to 4.4A are used by the defrost heater, which is a separate thing from the compressor.
7.7A - 4.4A = 3.3A.
3.3A * 115V = 379W, which is quite a nice match ...
- 6,976
1
vote
Best way to go from 5V to .95V to power an FPGA at max 15A
Looking at the Renesas Rad Hard Switching Regulators which has been filtered to select regulators which can supply a maximum of 15 A there are the following which might meet the requirements:
...
- 1,479
1
vote
Best way to go from 5V to .95V to power an FPGA at max 15A
A brief search on TI's website reveals a handful of space-rated buck controllers, several of which are capable of output voltages as low as 0.604 volts. In particular, the TPS7H4003-SEP and TPS7H4001-...
- 30k
1
vote
Best way to go from 5V to .95V to power an FPGA at max 15A
You didn't say what your 5 V current requirement is, apart from your notional concept of generating the 0.95 V 15 A supply from the 5 V supply.
But I think you should generate both your 5 V and 0.95 V ...
- 10.3k
1
vote
Best way to go from 5V to .95V to power an FPGA at max 15A
I think you could coerce the PE99155 into making 0.95V by inserting a voltage divider between EAINP and VREF. Check with the Teledyne apps folks. (You did, they vetoed it.)
It's also possible to ...
- 51.1k
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