A MCU with integrated RS485 PHY
I have never heard of this.
WCH CH563
Cyclone IV?
3D printing.
Ditto for display modules.
Large-value (~10 uF) *medium* ESR ceramic capacitors. Most existing ones have frustratingly low ESR for bypassing applications.
Not if your control loop is properly designed. There are tons of LDO/SMPS controllers that can operate at nearly zero ESR, as long as they're designed properly.
What's that got to do with the price of fish? There are plenty of places one needs some bypassing (with the damping of moderate ESR) that are nowhere near a PSU or its control loop, or a control loop of any kind.
A MCU with integrated true bipolar ADC inputs, say +-10V and 16Bit plus and 500KSPS+ of course single supply device say 3.3V
A MCU with integrated RS485 PHY, with integrated CAN PHY
A MCU with integrated Audio Codec
An ARM Cortex A with integrated DRAM (more than 1GB) and from a know good brand not bullishit parts from Allwinner with out the real good support
technix
Thanks, but did you even read it carefully? STM32F373 it's not bipolar input!
QuoteI have never heard of this.it's a wish list and I'm sure you never heard of it,
QuoteWCH CH563Can we see the datasheet in English?
QuoteCyclone IV?Not affordable enough.
Quote3D printing.a plastic injection is far superior to 3D printing rubbish
QuoteDitto for display modules.what's Ditto? do you have a link? we need image sensors with real datasheet and availability
a plastic injection is far superior to 3D printing rubbishMaking the mold costs a crazy lot of $$$. For one-off products you are more likely than not stuck to CNC and 3D printing.
A MCU with integrated RS485 PHY, with integrated CAN PHY
Electrolytic Capacitors (i.e. low cost, relatively high capacitance value) which DON'T leak and/or significantly deteriorate, over a large number of years.
Tantalum and aluminum capacitors with solid polymer electrolyte are available. Well known types include Sanyo OS-CON and others.
Solid polymer electrolytic capacitors have their own wearout mechanism; the polymer degrades following the usual Arrhenius equation halving their operating lifetime for every 10C temperature rise. Their big advantage is lower ESR yielding lower power dissipation and operating temperature.
The closest thing to an electrolytic capacitor which does not wear out is a solid or wet tantalum capacitor (1) but these have their own issues and high price. In practice an almost arbitrarily long operating life can be gained using normal aluminum electrolytic or polymer electrolytic capacitors with suitable derating.
(1) And niobium oxide capacitors?
I'd like to see a Zynq in a stacked RAM package.
4. CdS cells - Is there really a problem with hermetically sealed CdS?
A few rambling thoughts:
- A runtime-reconfigurable CPLD. It starts up with the image last flashed via a dedicated programming connection (say, JTAG) to its internal flash. Groups of pins and cells can be locked into fixed configurations via security bits in the flash. It is through this initial image and a non-programming connection that you reconfigure the remaining cells (say, via SPI). The locking protects the runtime changes from being destructive, such as outputting on a pin that on your board goes to another output. Specification is open enough that you don't need a specialised tool to make these runtime changes.
- A conductor/insulator/conductor "sandwich" with a module coming out of the side that you could attach two jumper wires to. To use, you desolder an IC lead from its pad, insert the "sandwich", resolder, and now you can insert something in series between the IC lead and the pad (eg. to measure current). Bonus points if it comes with a tiny DIP switch that you can switch to keep it connected when not in use.
- Readily available extremely short 2.54mm female/female headers to adapt male headers/jumpers to male headers/jumpers, as well as allowing you to adapt a through-hole component to a male header pin where distance matters (eg. crystal, cap on a breakout board).
- A Surface mount 2.54mm male/female header that is insulated underneath, with a small side tab that you could solder to an existing populated SMT pad on a PCB, to add jumper-wire-friendly connection to a prototype PCB that you left out. I have no idea how you'd secure it for disconnections though.
- Minimal through-hole breakouts customised for each MCU produced with space to put caps and crystals optimally as standard. The design is released so anyone can make them. Purchasable assembled and unassembled.
- Some of the more interesting battery charger plus voltage regulator ICs with proper leads rather than being mostly leadless.
- Fully-assembled boost converter module as a through-hole component with no layout requirements. Five pins: In, out, ground, enable, and a resistor to set voltage.
- Small breadboard with no valley so that you can plug a two row 2.54mm connector directly into the middle via male headers and have connections heading outward from each individual pin.
- A breadboard that can grasp short pins.
- Jumper wire with small (eg. 22 ohm) series resistors located near either one or both ends.
- A small inexpensive reprogrammable eight-pin device that does nothing but apply a lookup table to a fixed number of input pins to produce output for a fixed number of output pins. Pins might be VCC, GND, three inputs, two outputs, programming pin. Like a small primitive CPLD.
- Power-pooling IC that accepts a few power sources and outputs uninterrupted power even as the sources are connected and disconnected. One source assumes a single-cell Li-Po and minimises the voltage drop. The battery source is isolated if the other sources are providing power. An output pin indicates if we are running from battery or not.
- An external power detect/LED IC for projects that use a battery. Overvoltage-protected input detects external power. Output (eg. to MCU) to indicate when external power is detected. Open drain output to connect to a LED. Input (eg. from MCU) that overrides the LED output, either on or off. IC is ultra-low-power when LED off and no external power.
- Shift register where every two bits controls what is connected to one pin: Either nothing, a weak pullup, or a weak pulldown.
- Inexpensive through-hole P-channel MOSFETS (if it's 6c for SOT-23, why am I paying $1.60 for something comparable through-hole?).
- A micro USB B connector with long leads for hand-soldering that is actually sold anywhere.
- Small SMT crystals with leads or at the very least hand-solderable pads on the side of decent size.
- A small surface-mount component (0603 or much smaller) that conducts as shipped but you can deliberately break the connection with a small tool, magnifier, and steady hand. Essentially a tiny dip switch with default on.
- A module that you can solder on to standard footprints that contains an upper module with the same footprint but with longer pads.
- An adapter that has 2.54mm male header pins on one side (say, 2x5) and individually spring-loaded pins on the other that will make contact with a wide range of PCB hole sizes. The header pins then go to a cable. For testing before soldering real headers on.
- Jumper wire with one end having some kind of connector that lets you make secure, but temporary connections with a plated through-hole of various sizes *vertically* at most points on a PCB.
That was actually quite fun to write up. I'm sure quite a few of these exist already.
An 0805 smd resistor with 2W power handling and an electrolytic cap that doesn't die in any way possible.
- Shift register where every two bits controls what is connected to one pin: Either nothing, a weak pullup, or a weak pulldown.I wonder if the MCP23S17 counts as a shift register with pin I/O controls? It is effectively two PIC16 parallel I/O blocks hooked to a SPI bus.
Just add heatsinks.
- A runtime-reconfigurable CPLD. It starts up with the image last flashed via a dedicated programming connection (say, JTAG) to its internal flash. Groups of pins and cells can be locked into fixed configurations via security bits in the flash. It is through this initial image and a non-programming connection that you reconfigure the remaining cells (say, via SPI). The locking protects the runtime changes from being destructive, such as outputting on a pin that on your board goes to another output. Specification is open enough that you don't need a specialised tool to make these runtime changes.
- An adapter that has 2.54mm male header pins on one side (say, 2x5) and individually spring-loaded pins on the other that will make contact with a wide range of PCB hole sizes. The header pins then go to a cable. For testing before soldering real headers on.
- Jumper wire with one end having some kind of connector that lets you make secure, but temporary connections with a plated through-hole of various sizes *vertically* at most points on a PCB.
- A runtime-reconfigurable CPLD. It starts up with the image last flashed via a dedicated programming connection (say, JTAG) to its internal flash. Groups of pins and cells can be locked into fixed configurations via security bits in the flash. It is through this initial image and a non-programming connection that you reconfigure the remaining cells (say, via SPI). The locking protects the runtime changes from being destructive, such as outputting on a pin that on your board goes to another output. Specification is open enough that you don't need a specialised tool to make these runtime changes.
Something quite close to what you describe could be realised with the 'warmboot' feature of Lattice' iCE40 FPGAs.
- An adapter that has 2.54mm male header pins on one side (say, 2x5) and individually spring-loaded pins on the other that will make contact with a wide range of PCB hole sizes. The header pins then go to a cable. For testing before soldering real headers on.
- Jumper wire with one end having some kind of connector that lets you make secure, but temporary connections with a plated through-hole of various sizes *vertically* at most points on a PCB.
These ideas are similar to the reusable solderless headers that I wish existed.
https://www.eevblog.com/forum/projects/components-you-wish-existed-88167/msg1206329/?topicseen#msg1206329
- A conductor/insulator/conductor "sandwich" with a module coming out of the side that you could attach two jumper wires to. To use, you desolder an IC lead from its pad, insert the "sandwich", resolder, and now you can insert something in series between the IC lead and the pad (eg. to measure current). Bonus points if it comes with a tiny DIP switch that you can switch to keep it connected when not in use.
- Fully-assembled boost converter module as a through-hole component with no layout requirements. Five pins: In, out, ground, enable, and a resistor to set voltage.
- Power-pooling IC that accepts a few power sources and outputs uninterrupted power even as the sources are connected and disconnected. One source assumes a single-cell Li-Po and minimises the voltage drop. The battery source is isolated if the other sources are providing power. An output pin indicates if we are running from battery or not.
- Shift register where every two bits controls what is connected to one pin: Either nothing, a weak pullup, or a weak pulldown.
- A small surface-mount component (0603 or much smaller) that conducts as shipped but you can deliberately break the connection with a small tool, magnifier, and steady hand. Essentially a tiny dip switch with default on.
- An adapter that has 2.54mm male header pins on one side (say, 2x5) and individually spring-loaded pins on the other that will make contact with a wide range of PCB hole sizes. The header pins then go to a cable. For testing before soldering real headers on.
- Jumper wire with one end having some kind of connector that lets you make secure, but temporary connections with a plated through-hole of various sizes *vertically* at most points on a PCB.
- A conductor/insulator/conductor "sandwich" with a module coming out of the side that you could attach two jumper wires to. To use, you desolder an IC lead from its pad, insert the "sandwich", resolder, and now you can insert something in series between the IC lead and the pad (eg. to measure current). Bonus points if it comes with a tiny DIP switch that you can switch to keep it connected when not in use.Are there FFCs with double-sided ends? What I mean by that is that the contacts on one side of the end of the FFC go to different traces than the contacts on the other side of the same end. If those exist, you could cut them up and use them for that purpose.
- Fully-assembled boost converter module as a through-hole component with no layout requirements. Five pins: In, out, ground, enable, and a resistor to set voltage.https://www.digikey.com/products/en/power-supplies-board-mount/dc-dc-converters/922
- Power-pooling IC that accepts a few power sources and outputs uninterrupted power even as the sources are connected and disconnected. One source assumes a single-cell Li-Po and minimises the voltage drop. The battery source is isolated if the other sources are providing power. An output pin indicates if we are running from battery or not.Those are called "power multiplexers", I think. Pololu sells one or two on breakout boards.
- Shift register where every two bits controls what is connected to one pin: Either nothing, a weak pullup, or a weak pulldown.Use a tri-state shift register, and put resistors in series with its outputs?
- A small surface-mount component (0603 or much smaller) that conducts as shipped but you can deliberately break the connection with a small tool, magnifier, and steady hand. Essentially a tiny dip switch with default on.Solder jumper?
- An adapter that has 2.54mm male header pins on one side (say, 2x5) and individually spring-loaded pins on the other that will make contact with a wide range of PCB hole sizes. The header pins then go to a cable. For testing before soldering real headers on.
- Jumper wire with one end having some kind of connector that lets you make secure, but temporary connections with a plated through-hole of various sizes *vertically* at most points on a PCB.Tag Connect or Tag-Connect—seems they can't decide if it should be hyphenated or not—is the closest thing I know of to those ideas.