Content for 74LS145


The SN54 /74LS145, 1-of-10 Decoder/Driver, is designed to accept BCD inputs and provide appropriate outputs to drive 10-digit incandescent displays. All outputs remain off for all invalid binary input conditions. It is designed for use as indicator/relay drivers or as an open-collector logic circuit driver. Each of the high breakdown output transistors will sink up to 80 mA of current. Typical power dissipation is 35 mW. This device is fully compatible with all TTL families.

Nanocomp 6809 8 Bit Retro Computer on Breadboards

“Wireless World Magazine in January and June 1981 published this design. Reproduced on solderless breadboards using the original Monitor ROM The Nanocomp 6809 was a simple microcomputer design published in Wireless World magazine in 1981, with a 25 key keypad …

7400 Series Discrete Logic Word Clock

“Clocks are a problem for me, I keep designing them but I never seem to finish building my designs. I’m not really sure why. Maybe it’s because I limit myself to using only TTL logic, or that my …