BASIC Stamp. Diagram of a BASIC Stamp 2 Technical specifications[edit] Although the BASIC Stamp has the form of a DIP chip, it is in fact a small printed circuit board (PCB) that contains the essential elements of a microprocessor system: A Microcontroller containing the CPU, a built in ROM containing the BASIC interpreter, and various peripheralsMemory (an i²C EEPROM)A clock, usually in the form of a ceramic resonatorA power supplyExternal input and output The end result is that a hobbyist can connect a 9 V battery to a BASIC Stamp and have a complete system.
A connection to a personal computer allows the programmer to download software to the BASIC Stamp, which is stored in the onboard non-volatile memory device: it remains programmed until it is erased or reprogrammed, even when the power is removed. Playground - SolenoidTutorial. You can not drive a solenoid directly from your Arduino.
It requires more current than you can provide and produces destructive voltages when it is switched off. There is a simple solution. Solenoids take a lot of power. Scooterputer. I spend a fair amount of time zipping around town on my scooter, and thought it would be cool to add a voltage monitor to warn when the battery might need recharging.
Waiting until the electric starter no longer works is somehow lacking. So after an evening with an Arduino Duemilanove, I had a simple programmable voltage divider with 3 LEDs indicating battery low, good, and charging. Done.