Timer kit 1 - 8 to 8192sec (2.3h)
A 555 timer IC can be set to 1 second oscillation. The 555 output is fed to a 4020B ripple counter IC. Eleven time outputs from the counter is jumper selectable to an on-board relay. PCB dimensions: 58mm x 53mm. |
Serial Isolated I/O Module
8-Relay Module (mains rated - 110V and 250VAC.) An extension of our Kit CPS74 (see next kit), PC controlled 8-Relay Board with 250V switching relays and added features. It is in a plastic case, latched relay operation, 250V relays switched in safety by using Dinkle connectors, and with 4 external inputs. Uses serial port so it can be located over 100 yards from the PC. Comes with case and end panel pieces as shown in the photos. Requires a center positive 9-to-12V DC power supply, at least 500mA, 2.5mm jack. (CPS108)
120 second Non-volatile multi message recorder kit
| Non-volatile multi message recorder using ISD chips. Just change one resistor for longer duration. Standalone operation using just six onboard bottons. Record via built-in microphone or external line in. Speaker and line out connector. SPI interface. 8-24 VDC. $45.89 |
50 second USB recording module (3.5mm Mod)
Features
Up to 50 seconds of re-recordable voice message (8K sample rate)
Use USB type-A male connector for direct plug into USB port of PC (USB1.1)
Easy to transfer software for windows of MP3 or WAV audio file.
Choice of 8K or 12K sample rate.
50 seconds non-volatile recordable IC.
Operating Voltage 4.5V (3 x AG10 batteries included)
Operating Current < 50 mA
Standby Current < 5 uA
Push switch for playback / stop
$16.75
Power supply voltage adj. 1.5 to 30V kit
This is a basic adjustable voltage power supply using the popular three pin regulator, LM317T. You can select any voltage between 1.5V and 30V using a potentiometer. The LM317T is rated at 1.5A so you must use a larger heat sink when drawing high currents. Unregulated AC or DC input via terminal block or power jack. Requires a suitable transformer.(CPS68)
$16.95
Dual HI / LO Switching Relay Board |
The kit is based around the ULN2003A IC, a 7-channel high voltage, high current relay driver. The inputs are TTL compatible so they can be connected to 5V. LO 0-0.8VDC. HI 2.4V - 12VDC. Operating voltage: 12V DC. The relay will be operated when either the LO input is
low (0 – 0.8V) or the HI input is high (2.4V – 12V.). Two 12V relays, coil resistance 400 ohm are used. It is rated to switch 250VAC at 12A. However, because of the PCB track thickness and width we do not recommend using the relay to switch more than 5A. PCB size: 2 3/4"x1 3/4" (CPS156)
$16.97