12V 50Ω solenoid driver. Can be chained to control more than eight solenoids.
The solenoid driver uses a shift register with a latch to control its outputs such that a singe microcontroller (e.g. Arduino) can control large amounts of solenoids whilst only requiring 3 output pins.
- Too big thermals reliefs on; U1-pin8, R12..R15, R24..R27 (they cool too quickly while solder...
This project is rework Schematics and PCB 3D Wire Bending Machine from [howtomechatronics](https://howtomechatronics.com/projects/arduino-3d-wire-bending-machine/)
- Adding servo connector
- Power regulator is used [Mini DC-DC 4.5-24V To 5V 3A](https://www.aliexpress.com/item/32768078949.html?spm=a2g0o.cart.0.0.10f63c00YJjLX9&mp=1)
This controller is absolutely cold in operation and allows power...
This my first take on an Arduino Nano PLC(ish) device.
It uses standard discrete components and thus is rather cheap to build.
But discrete components do take up a bit more space.
The inputs can accept up to 24v and are connected to the analoge pins, using optocouplers the inputs are electrically isolated
from the Arduino.
The outputs uses relays, the outputs from the relay uses an external sourc...
PCB muon detector
Schematics designed by Robert Hart:
Thanks to Robert Hart for his fantastic ideas, please check his site for further experiments:
This project uses 3 Geiger tubes to create a muon detector, it also uses a step up boost DC-DC to convert from 5V to 400V for Geiger tubes.
This main PCB has...
Connect 2.4Ghz Nordic NRF24L01+ transceiver to Arduino and run the pingpair_ack example sketch from the RF24 library. A pair of these will communicate over a range of approx 10-20m indoors with 2 concrete walls in-between. Range outdoors is approx 20-40m. The scanner sketch is also useful to find free channel in heavy wifi traffic.
Control several FAN(3 pin) via PWM
PWM from motherboard connector (4 pin) or temperature sensor - jumper selection.
-with capacitor: RPM range 50-100%, RPM sensor working;
-without capacitor: RPM range 10-100%, RPM sensor not working.