Soft and stretchy, this Eeonyx Stretchy Variable Resistance Sensor fabric is great for making soft sensors or wearables that need to adjust and move. This is a bidirectionally stretchy nylon+spandex fabric coated with a long-lasting conductive coating that changes resistance when you pull on it!

It's perfect for making stretch or strain sensors, by measuring the resistance change from one end of the fabric to the other - you'll need a resistive divider and analog-reading microcontroller. Each order comes with one sheet of 12"x13" inch / 33 x 30cm fabric with a nominal 0.5mm thickness. The fabric as a soft hand, and is easy to stitch, sew, or serge. Each sheet has a resting 20K-ohm/square inch surface resistivity and decreases to maybe 1/2 that when stretched. It has been tested up to 30 washes with no appreciable change in resistivity.

The squarish board with two chips on it is the transmitter (power with 9V).  The longer board is the output and you can connect that to the part of your project that needs powering.

Inductive charging is a way of powering a device without a direct wire connection. Most people have seen inductive charging in a rechargable electric toothbrush: you may have noticed that you recharge it by placing it into the holder, but there's no direct plug. These chargers work by taking a power transformer and splitting it in half, an AC waveform is generated into one, and couples into the second coil.

This is a basic charger set, and it does work, providing 3.3V DC output from the output half when the input half is powered with 9V to 12VDC. You can draw as much as 500mA if the coils are 2 or 3 mm apart. If you only need 100 or 200mA you can be up 7mm apart. For 10mA draw, the coils can be up to half an inch (12.5mm) apart. Any non-ferrous/non-conductive material (eg air, wood, leather, plastic, paper, glass) can be used between the two coils. The material doesn't affect the distance or efficiency. The coils do need to be fairly co-axial, try to get them to be parallel and have the circles line up for best power-transfer. (This is why the electric toothbrush must fit into the plastic holder, it's lining up the two coils for best efficiency.)

Because it's an air-core transformer, it's fairly inefficient. Only about 40% of the energy in shows up on the other end, but for low power or charging project. If you draw 5V 100mA on the output side (0.5W), you'll need 0.5W * 2.5 / 9V = ~150mA from the input end. The quiescent current is about 70mA at all time, even when the other coil is not anywhere near by.

These are basic modules, probably used for some low cost toy. We don't have any datasheets or specifications for them. We do see a feedback resistor divider on the output side using 0603 SMT resistors so an advanced user could solder in different values to turn it into a different valued output.

Inductive Charging Set - 3.3V @ 500mA max (0:08)

The squarish board with two chips on it is the transmitter (power with 9V).  The longer board is the output and you can connect that to the part of your project that needs powering.

Inductive charging is a way of powering a device without a direct wire connection. Most people have seen inductive charging in a rechargable electric toothbrush: you may have noticed that you recharge it by placing it into the holder, but there's no direct plug. These chargers work by taking a power transformer and splitting it in half, an AC waveform is generated into one, and couples into the second coil.

This is a basic charger set, and it does work, providing 5V DC output from the output half when the input half is powered with 9V to 12VDC. You can draw as much as ~500mA if the coils are 2 or 3 mm apart. If you only need 100 or 200mA you can be up 7mm apart. For 10mA draw, the coils can be up to half an inch (12.5mm) apart. Any non-ferrous/non-conductive material (eg air, wood, leather, plastic, paper, glass) can be used between the two coils. The material doesn't affect the distance or efficiency. The coils do need to be fairly co-axial, try to get them to be parallel and have the circles line up for best power-transfer. (This is why the electric toothbrush must fit into the plastic holder, it's lining up the two coils for best efficiency)

Because its an air-core transformer, it's fairly inefficient. Only about 40% of the energy in shows up on the other end, but for low power or charging project. If you draw 5V 100mA on the output side (0.5W), you'll need 0.5W * 2.5 / 9V = ~150mA from the input end. The quiescent current is about 70mA at all time, even when the other coil is not anywhere near by.

These are basic modules, probably used for some low cost toy. We don't have any datasheets or specifications for them. We do see a feedback resistor divider on the output side using 0603 SMT resistors so an advanced user could solder in different values to turn it into a 3.3V output.

Inductive Charging Set - 5V @ 500mA max (9:19)

This knit conductive fabric is plated with real Silver and super luxe! Use small pieces on the tips of gloves or in any soft circuit situation where you need a bit of stretch. This highly conductive fabric has a resistance of less than 1 ohm per foot in any direction across the textile. It can be used to make soft keypads and capacitive touch sensors, as well as soft "squeeze" switches. Great for use with FLORA.Sold as a 20cm x 20cm piece (minimum dimension)Use a dry iron on medium. Dry cleaning recommended. Do not use steam! Discoloration can occur.

Knit Conductive Fabric - Silver 20cm square (11:35)

This soft potentiometer is an interesting way to add an adjustable resistor / slide potentiometer to your wearable. You can use it to adjust the brightness of an LED, or as a sensor input to your Flora or Gemma. When the ring slides up and down the ribbon, the resistance from the end of the ribbon to ring will vary from ~100 ohms to about 8Kohm.

To use as a voltage-output potentiometer, connect one end to ground and the other end to 3.3V or so, then measure the voltage on the ring in reference to ground. For an adjustable resistor, connect to one end of the ribbon and the ring, let the other end  hang disconnected.

The kit includes 50cm of specially-woven conductive ribbon and a stainless steel metal ring.