Iot123 - 3.3V Power Brick

Iot123 - 3.3V Power Brick

“The IOT123 BRICKS are DIY modular units that can be mashed up with other IOT123 BRICKS, to add functionality to a node or wearable. They are based on the inch square, double-sided protoboards with interconnected through holes. Although the instructions relate to a semi-permanent bond between the BRICKS, the male pin joiner described here can be swapped for a pair …

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A Discrete Transistor 7400 NAND GATE

A Discrete Transistor 7400 NAND GATE

“If we did not have ICs then this is what a 7400 NAND gate would look like! The 7400 TTL (and LS-TTL) quad NAND gate is one of the most common integrated circuits (IC) around. Here is a discrete transistor version. To show that it works it is used as an LED flasher. “

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IOT123 - 5Pin Attiny85 Nrf24L01 Brick

IOT123 - 5Pin Attiny85 Nrf24L01 Brick

“The IOT123 BRICKS are DIY modular units that can be mashed up with other IOT123 BRICKS, to add functionality to a node or wearable. They are based on the inch square, double-sided protoboards with interconnected through holes. This BRICK adds 2.4GHz RF connectivity to a master for IOT node data aggregation. It is not very flexible as it only …

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IOT123 - HV ATTINY85 Fuse Resetter

IOT123 - HV ATTINY85 Fuse Resetter

“There are many versions of the ATTINY85 Fuse Resetters on the NET. This is based on the work of Arduino (blog, the above schematic) and Ralph Bacon (GIT, Youtube video above). The main benefit of this device is sacrificing the reset pin on an ATTINY85 for use as a GPIO. The main differences with the previous builds are I embed …

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PID Temperature Controller

PID Temperature Controller

“My friend is building a plastic extruder for plastic recycling (https://preciousplastic.com). He needs to control the extrusion temperature. For that purpose he is using a nozzle heater band. In this nozzle, there is a thermocouple and a heating unit which allow us to measure the temperature and finally reach the desired temperature (make a retroaction loop). When I …

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Reflow Soldering Hotplate

Reflow Soldering Hotplate

“Soldering tiny SMD components can be quite challenging, but the process can also be automated. This can be done by applying soldering paste and baking it, either in a (reflow) oven or on a hot plate (like a cooking plate in your kitchen). Around the web, I’ve seen many DIY reflow ovens; in my opinion they have one big …

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Executive Decision Maker

Executive Decision Maker

“Ever had to make a decision by flipping a coin? Well the Executive Decision Maker takes that to another level! Based around the ever popular 555 timer, the Exec Decision Maker will help you make all those tricky decisions with the blink of an LED. Need to decide whether to eat out or just stay in leave it up to …

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