Hour counter AC & DC

Description:

When my brother built his EL84 amplifier he wanted to be able to count on/off operations and how long the amplifier had been running, and we came up with this clever on/off and hour counter in both an AC and a DC version based on a PIC16F628A and a seven segment LED display.

Picture gallery AC version:

Click on the picture to enlarge it and read our comments and advice

 

Projects files:

The electronic files

Picture gallery DC version:

Click on the picture to enlarge it and read our comments and advice

 

Projects files:

The electronic files

Project keywords

12au7 12ay7 12f1501 12f675 12f683 16f628 16f628a 16f84 16f877 18f1220 18f1320 18f252 18f2553 18f2620 18f452 18f4620 18f4685 24lc1025 24lc256 2sk170gr 3d print 6922eh 6c33 6c45 6cg7 6h30 6sn7 ams ccs811 arduino audio bme280 bmp805 buf634 class a clock dht22 district heating ds1307 ds1621 ds18b20 ds18s20 ds3231 dtmf ecc83 el84 elektor gnt a f68 goldwave gpo bt 21a heat sink hifi ir jlcpcb kamstrup multical 401 led lego lf353 li ion battery lm723 lr8n3 max038 mosfet mrds192 opa134 opa627 pga2310 pga2311 photo pcb pic programmer raspberry pi rdvv remote rs232 single ended sipura spa 2102 srpp tda1541a tda1543 tda7330b tda7439 test tip162 tl431 tool triode tsa5511 usb weather 18650

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