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My Tai Chi metronome works using a digital10k potentiometer to select and display timings of 2 to 5 seconds beats. My problem is to increase the "sound" output. I have tried OpAmps and Darlington pair with little effect, once using a 100R preset to reduce volume. I looked at using the "sound"...

Having spent hours searching the web for code for a digital variable resistor I came across this 8 pin chip. It appears to do everything I want for up/down push button control with a memory storing the last wiper position. Maxim Integrated. Dallastat. DS1809-010 10k, 4.5 to 5.5v, 64 positions...

One of the problems in trying to do too many code routines at once is that you do not know where are the mistakes. This situation is a case in point. The problem is pressing the button does not initiate the code change immediately. I have tried do: loop until pinC.3 = 1 and while pinC.3 =...

Very odd situation. The following code works but the fist sub code "beat50" reduces the speaker volume Question: Why should the position of the first sub code “beat50” cause the sound output from the speaker to be significantly reduced. INIT: dirsb=%01000000 dirsc=%00000000 main: if...

Metronome for Tai Chi has been prototyped with 6 pole rotary switch for 6 breathing times a variable resistor for volume control. I now want to replace the hardware with push buttons. Below is simple 08m2 circuit to test new codes C.1, 2 & 4 output leds and c.3 switch input full details of...

Output PWM pulse momentarily goes to zero at various joystick positions. A joystick is being used to control a motor via an H-bridge. The motor stutters at repeatable joystick positions. Previous system using a Tx/Rx works OK. See circuit diagram, code and notes at...

Module 8 is part of the control system for my servoless self tailing winch. It counts the number of rotations of the shaft to let the sail sheet out (forwards) and pull it in (reverse). Total sheet travel is seven turns = 7 x 12 slots on the disc = 84 pulses. To set the counter to zero, the...

Never having used a H-Bridge driver before, I produced a circuit diagram from various sources. MFA 919D motor drawing 1.5A @ 6v. 1.2v Voltage drop across L298 Is it correct? Is it necessary to ground both sensor pins 1 and 15? What do you think about Alan Bond's addition of a 220R to reduce...

My black box servo tester was used to see how an 08m would handle inputs from 0 to 2.4ms. Would you be surpresed if I told you I got 9 turns from a Hitec sail drum servo. The box says 3.5 My article gives full details. Tony 9. Input by r/c receiver Marine R/C users will want to control...