You have bought a wrong Type-C plug, a host-simulating plug intended for plugging it into a device, signaling to a device that it can draw the default amount of current.
But what you want to do needs a device-simulating Type-C plug intended for plugging into a host, which signals the host to output 5V to your MicroUSB device.
Fortunately, it looks like you can modify the plug type. It currently has a 56k resistor from VBUS to CC pin.
The photos are poor but the empty resistor pads are for connecting a resistor from GND to CC.
You need to put a 5.1k resistor to the empty place and remove the 56k resistor.
Verify first with multimeter which resistor pads are VBUS, GND and CC to see if modifying is possible or if you must buy another plug.
Answer from Justme on Stack ExchangeConverting MicroUSB to USB-C
Reputable USB C to Micro USB Adapter
soldering - Wiring USB-C connector to micro-USB - Electrical Engineering Stack Exchange
Micro USB to USB-C
Hello,
I'm trying to convert simple devices (earbuds charging case, mouse.. 5V <500mA) to USB C.
So far, I managed to adapt and fit the USB C connector and it works with an USB-A to USB-C cable, however I want to make it work with USB-C chargers.
USB-C chargers don't put out power until it is requested by the device, so it plain simply doesn't work.
I've read for a while and it seems I need to install a 56k Ohm Pull-Up resistor on the CC1 and CC2 lines, but I have no idea where to put this resistor. Do I put the resistor between them? Do I pull from ground or vcc to both? Do I have to use one resistor for each?
I'm kinda lost, and would love to get a simple explanation like "solder it to that".
My USB-C plug has the following pins:
Ground (both sides), VCC (both sides), CC1, CC2.
https://www.amazon.com/Adapter-Convert-Connector-Support-Compatible/dp/B07GH5KJH2/?th=1
https://www.amazon.com/Adapter-KUXIYAN-Connector-Compatible-Devices-Black/dp/B07VBV1PY5/
Been looking at these but no idea if they're reputable and safe to use for charging devices. Cable Matters has a product but it's only a cable, does not look like they sell an adapter.
You have bought a wrong Type-C plug, a host-simulating plug intended for plugging it into a device, signaling to a device that it can draw the default amount of current.
But what you want to do needs a device-simulating Type-C plug intended for plugging into a host, which signals the host to output 5V to your MicroUSB device.
Fortunately, it looks like you can modify the plug type. It currently has a 56k resistor from VBUS to CC pin.
The photos are poor but the empty resistor pads are for connecting a resistor from GND to CC.
You need to put a 5.1k resistor to the empty place and remove the 56k resistor.
Verify first with multimeter which resistor pads are VBUS, GND and CC to see if modifying is possible or if you must buy another plug.
What you are building is a cable assembly fully defined in the USB Type-C spec v2.3. See section 3.5.7 USB Type-C to USB 2.0 Micro-B Cable Assembly on page 87.
Aside from connecting VBus, Ground D+ and D- pins, you need a 5.1kΩ resistor from A5 to Ground (see Table 3-18 note 1). This resistor tells the Type-C receptacle you'll plug into that this cable is meant to connect to a device and port should reconfigure as DFP, then supply VBus.
On the paddle board attached to the Type-C plug, this may be R1 or R2 (cannot tell on the photos). You should probably probe the footprints to see which one is connected to A5.
I have an andriod tablet using micro USB and I have been wondering if there is a way to convert it into USB-C even if only usb 2.0 (since that's the maximum is can handle anyway)